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The condenser water pumps take hot water from the condenser to the cooling tower, and the chilled water pumps take cold water from the chiller to your AC unit.
When the pump fails, water is not circulated as efficiently or at all, compromising the performance of your entire system. Thankfully, pumps often signal that there is something wrong, and these signals usually come in the form of odd and loud pump noises.
Loud and unusual sounds emanating from circulating pumps are always a red flag, a sign that something is wrong either with the pump or in the water lines.
Let’s take a look at a few problems in a building system that are commonly the cause of pump noises, and how to fix them.
1. Air in The System
If you don’t have an air separator installed, you will most likely have to deal with air in your system at some point. When this happens, it’s important to inspect the water lines and bleed the system.
Modern pumps have bleeder valves that make the process very easy. Slowly open the valve until you start hearing a hissing noise. Once the hissing ceases, you will see a slight dribble of water, indicating that the pump no longer has air. At this point, you can close the valve.
After doing this, make sure that the pump has been installed correctly. Even a few degrees of inclination or misalignment will allow air to get locked in the pump.
2. Incorrect Pump Size
Both oversized and undersized pumps can lead to noises in the system, but the solution to deal with each case is different.
Pumps can be oversized for several reasons. It could happen due to a degree of error in the planning and design stage when engineers need to “guesstimate” piping length and fittings, or it could be purposely designed this way so the system can expand in the future and the “right-size” pump today would not be able to meet the future demand of tomorrow.
Sometimes a pump replacement is needed right away, and the supplier didn’t have the perfect replacement in stock, or the engineers choose an oversized pump already considering an expected build-up of corrosion in the pipes that require more pump head.
Regardless of the reason that led to an oversized pump, having one can always cause excessive noise and vibration, loosing up connections and joints and causing piping fatigue.
To solve the issue, you can take the following actions:
If the system is undersized, it can’t provide the duty needed, it can also lead to deadheading - when a pump’s discharge is closed because of a blockage in the line or an unintentional closed valve. When this happens, the fluid churns inside the pump until it heats up into a vapor, causing noise and damage. Deadheaded pumps can lead to motor burn out, a damaged impeller, seal leakage, cracked bushings, and compromised elastomers, ultimately killing the pump.
In systems with undersized pumps, you can verify if the existing pump can handle a larger motor to avoid dead head. Even though it may be the cheapest way to handle the problem, it is not the best and the solution would just be temporary.
3. Excessive Wear of Bearings
Only some pumps have bearing assemblies, not all. However, all electric pump motors have bearings, and the excessive wear of bearings – whether on the assembly or inside the motor - can cause pump noise.
The good news is that pump models with bearing assemblies usually have the components available for purchase, and they are inexpensive and easy to replace.
The bad news is that motor bearings are not sold as components, and when the bearings wear out in the motor, you need to replace the entire part.
The life of a bearing is determined by how many hours it takes for the metal to “fatigue,” but many factors can affect this, such as static overload, corrosion, lack of excess of lubricant, overheat, misalignment, and contamination. So, the best way to avoid bearings from wearing out too fast is via preventive maintenance and a comprehensive inspection of your system.
4. Clogged System
Water with rust and other sediments can wear out the circulating pump and clog the impeller. When this happens, noise is a consequence. To get rid of it, there is no magic bullet: the solution is in cleaning the system.
Many HVAC systems have dedicated filtration systems and dirt separators to prevent clogging from happening. Sediments can be easily removed from the system through water blowdown.
These systems protect not only pumps but all the other HVAC units in the system.
5. Incorrect Speed Setting
High-quality and modern pumps usually have 3 flow settings, while older pumps may have only one or two. That’s why older pumps are typically noisier than others. They are less efficient, and the energy loss is usually translated into a humming noise.
If your pump is making this noise and you have more than one option of flow setting to work with, locate the flow switch and turn it down one level. Then check the radiators and tower rails to verify if they are still getting up to the temperature they should. If so, then leave it this way.
If you operate with a VFD and your pump is still making a humming noise, check to see if you have a correct grounding of the motor to the VFD. In many cases, incorrect grounding allows the system to act as a noise transmitter.
6. Lack of NPSHa or Incorrect Install Causing Lack of NPSHa
To understand this, we need to take a step back and take a quick look at pump operation. Bernoulli's principle shows us that fluid flows from areas of high pressure to areas of low pressure.
HVAC pumps operate by creating low pressure at the inlet, allowing the water to be pushed into the pump. As the fluid flows through the pump, the pressure decreases. If the pressure at the inlet happens to fall below the vapor pressure of the fluid, air bubbles form at the inlet. These bubbles can cause cavitation, leading to pump noise, damage, and lower capacity.
Net Positive Suction Head or NPSH is the difference between liquid pressure at the pump suction and liquid vapor pressure and is expressed in terms of the height of the liquid column. NPSH needs to be usually 3 to 5 feet to avoid cavitation.
If detected in an inspection that there’s a problem with the NPSH, basically two things can be done: first, there’s the option to choose a more appropriate pump for the application (our recommendation if the pump has already suffered irreparable damage due to cavitation). Second, the system can be reevaluated to see if elevating the cooling tower can increase NPSHa (the absolute pressure at the suction port of the pump) or if fittings that rob current NPSHa can be reduced.
If you need assistance with anything related to circulating pumps, contact water pump dubai. we can go wherever you are to inspect your pump if you are experiencing loud and unusual noises.
When the pump fails, water is not circulated as efficiently or at all, compromising the performance of your entire system. Thankfully, pumps often signal that there is something wrong, and these signals usually come in the form of odd and loud pump noises.
Loud and unusual sounds emanating from circulating pumps are always a red flag, a sign that something is wrong either with the pump or in the water lines.
Let’s take a look at a few problems in a building system that are commonly the cause of pump noises, and how to fix them.
1. Air in The System
If you don’t have an air separator installed, you will most likely have to deal with air in your system at some point. When this happens, it’s important to inspect the water lines and bleed the system.
Modern pumps have bleeder valves that make the process very easy. Slowly open the valve until you start hearing a hissing noise. Once the hissing ceases, you will see a slight dribble of water, indicating that the pump no longer has air. At this point, you can close the valve.
After doing this, make sure that the pump has been installed correctly. Even a few degrees of inclination or misalignment will allow air to get locked in the pump.
2. Incorrect Pump Size
Both oversized and undersized pumps can lead to noises in the system, but the solution to deal with each case is different.
Pumps can be oversized for several reasons. It could happen due to a degree of error in the planning and design stage when engineers need to “guesstimate” piping length and fittings, or it could be purposely designed this way so the system can expand in the future and the “right-size” pump today would not be able to meet the future demand of tomorrow.
Sometimes a pump replacement is needed right away, and the supplier didn’t have the perfect replacement in stock, or the engineers choose an oversized pump already considering an expected build-up of corrosion in the pipes that require more pump head.
Regardless of the reason that led to an oversized pump, having one can always cause excessive noise and vibration, loosing up connections and joints and causing piping fatigue.
To solve the issue, you can take the following actions:
- Throttle the pressure-side valves until the noises are eliminated
- Trim the impeller diameter
- Reduce pump speed
- Add a flow recirculation line
- Install a variable frequency drive and remove control valves
If the system is undersized, it can’t provide the duty needed, it can also lead to deadheading - when a pump’s discharge is closed because of a blockage in the line or an unintentional closed valve. When this happens, the fluid churns inside the pump until it heats up into a vapor, causing noise and damage. Deadheaded pumps can lead to motor burn out, a damaged impeller, seal leakage, cracked bushings, and compromised elastomers, ultimately killing the pump.
In systems with undersized pumps, you can verify if the existing pump can handle a larger motor to avoid dead head. Even though it may be the cheapest way to handle the problem, it is not the best and the solution would just be temporary.
3. Excessive Wear of Bearings
Only some pumps have bearing assemblies, not all. However, all electric pump motors have bearings, and the excessive wear of bearings – whether on the assembly or inside the motor - can cause pump noise.
The good news is that pump models with bearing assemblies usually have the components available for purchase, and they are inexpensive and easy to replace.
The bad news is that motor bearings are not sold as components, and when the bearings wear out in the motor, you need to replace the entire part.
The life of a bearing is determined by how many hours it takes for the metal to “fatigue,” but many factors can affect this, such as static overload, corrosion, lack of excess of lubricant, overheat, misalignment, and contamination. So, the best way to avoid bearings from wearing out too fast is via preventive maintenance and a comprehensive inspection of your system.
4. Clogged System
Water with rust and other sediments can wear out the circulating pump and clog the impeller. When this happens, noise is a consequence. To get rid of it, there is no magic bullet: the solution is in cleaning the system.
Many HVAC systems have dedicated filtration systems and dirt separators to prevent clogging from happening. Sediments can be easily removed from the system through water blowdown.
These systems protect not only pumps but all the other HVAC units in the system.
5. Incorrect Speed Setting
High-quality and modern pumps usually have 3 flow settings, while older pumps may have only one or two. That’s why older pumps are typically noisier than others. They are less efficient, and the energy loss is usually translated into a humming noise.
If your pump is making this noise and you have more than one option of flow setting to work with, locate the flow switch and turn it down one level. Then check the radiators and tower rails to verify if they are still getting up to the temperature they should. If so, then leave it this way.
If you operate with a VFD and your pump is still making a humming noise, check to see if you have a correct grounding of the motor to the VFD. In many cases, incorrect grounding allows the system to act as a noise transmitter.
6. Lack of NPSHa or Incorrect Install Causing Lack of NPSHa
To understand this, we need to take a step back and take a quick look at pump operation. Bernoulli's principle shows us that fluid flows from areas of high pressure to areas of low pressure.
HVAC pumps operate by creating low pressure at the inlet, allowing the water to be pushed into the pump. As the fluid flows through the pump, the pressure decreases. If the pressure at the inlet happens to fall below the vapor pressure of the fluid, air bubbles form at the inlet. These bubbles can cause cavitation, leading to pump noise, damage, and lower capacity.
Net Positive Suction Head or NPSH is the difference between liquid pressure at the pump suction and liquid vapor pressure and is expressed in terms of the height of the liquid column. NPSH needs to be usually 3 to 5 feet to avoid cavitation.
If detected in an inspection that there’s a problem with the NPSH, basically two things can be done: first, there’s the option to choose a more appropriate pump for the application (our recommendation if the pump has already suffered irreparable damage due to cavitation). Second, the system can be reevaluated to see if elevating the cooling tower can increase NPSHa (the absolute pressure at the suction port of the pump) or if fittings that rob current NPSHa can be reduced.
If you need assistance with anything related to circulating pumps, contact water pump dubai. we can go wherever you are to inspect your pump if you are experiencing loud and unusual noises.
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Types of Chillers:
As described, two different cooling mediums (air or water) can facilitate the transfer of the latent heat given up as the refrigerant changes from vapor to liquid. Thus, chillers can use two different types of condensers, air-cooled and water-cooled.
Water-cooled chillers feature a water-cooled condenser connected with a cooling tower. They have commonly been used for medium and large installations that have a sufficient water supply. Water-cooled chillers can produce more constant performance for commercial and industrial air conditioning because of the relative independence to fluctuations of the ambient temperature. Water-cooled chillers range in size from small 20-ton capacity models to several thousand-ton models that cool the world’s largest facilities such as airports, shopping malls and other facilities.
A typical water-cooled chiller uses recirculating condenser water from a cooling tower to condense the refrigerant. A water-cooled chiller contains a refrigerant dependent on the entering condenser water temperature (and flow rate), which functions in relation to the ambient wet-bulb temperature. Since the wet-bulb temperature is always lower than the dry-bulb temperature, the refrigerant condensing temperature (and pressure) in a water-cooled chiller can often operate significantly lower than an air-cooled chiller. Thus, water-cooled chillers can operate more efficiently.
Water-cooled chillers typically reside indoors in an environment protected from the elements. Hence, water-cooled chiller can offer a longer lifespan. Water-cooled chillers typically represent the only option for larger installations. The additional cooling tower system will require additional installation expense and maintenance as compared to air-cooled chillers.
Air-Cooled Chillers:
Air-cooled chillers rely on a condenser cooled by the environment air. Thus, air-cooled chillers may find common application in smaller or medium installations where space constraints may exist. An air-cooled chiller can represent the most practical choice in scenarios where water represents a scarce resource.
A typical air-cooled chiller can feature propeller fans or mechanical refrigeration cycles to draw ambient air over a finned coil to condense the refrigerant. The condensation of the refrigerant vapor in the air-cooled condenser enables the transfer of heat to the atmosphere.
Air-cooled chillers offer the significant advantage of lower installation costs. Simpler maintenance also results due to their relative simplicity as compared to water-cooled chillers. Air-cooled chillers will occupy less space, but will mostly reside outside a facility. Thus, the outdoor elements will compromise their functional lifespan.
The all-inclusive nature of air-cooled chillers reduces maintenance costs. Their relative simplicity coupled with reduced space requirements produces great advantages in many types of installations.
For more info contact water pump dubai or call us at +971 4 252 2966
As described, two different cooling mediums (air or water) can facilitate the transfer of the latent heat given up as the refrigerant changes from vapor to liquid. Thus, chillers can use two different types of condensers, air-cooled and water-cooled.
- Air-cooled condensers resemble the “radiators” that cool automobile engines. They use a motorized blower to force air across a grid of refrigerant lines. Unless they are specially designed for high-ambient conditions, air-cooled condensers require ambient temperatures of 95°F (35°C) or below to operate effectively.
- Water-cooled condensers perform the same function as air-cooled condensers, but require two steps to complete the heat transfer. First, heat moves from refrigerant vapor into the condenser water. Then, the warm condenser water is pumped to a cooling tower where the process heat is ultimately discharged to the atmosphere.
Water-cooled chillers feature a water-cooled condenser connected with a cooling tower. They have commonly been used for medium and large installations that have a sufficient water supply. Water-cooled chillers can produce more constant performance for commercial and industrial air conditioning because of the relative independence to fluctuations of the ambient temperature. Water-cooled chillers range in size from small 20-ton capacity models to several thousand-ton models that cool the world’s largest facilities such as airports, shopping malls and other facilities.
A typical water-cooled chiller uses recirculating condenser water from a cooling tower to condense the refrigerant. A water-cooled chiller contains a refrigerant dependent on the entering condenser water temperature (and flow rate), which functions in relation to the ambient wet-bulb temperature. Since the wet-bulb temperature is always lower than the dry-bulb temperature, the refrigerant condensing temperature (and pressure) in a water-cooled chiller can often operate significantly lower than an air-cooled chiller. Thus, water-cooled chillers can operate more efficiently.
Water-cooled chillers typically reside indoors in an environment protected from the elements. Hence, water-cooled chiller can offer a longer lifespan. Water-cooled chillers typically represent the only option for larger installations. The additional cooling tower system will require additional installation expense and maintenance as compared to air-cooled chillers.
Air-Cooled Chillers:
Air-cooled chillers rely on a condenser cooled by the environment air. Thus, air-cooled chillers may find common application in smaller or medium installations where space constraints may exist. An air-cooled chiller can represent the most practical choice in scenarios where water represents a scarce resource.
A typical air-cooled chiller can feature propeller fans or mechanical refrigeration cycles to draw ambient air over a finned coil to condense the refrigerant. The condensation of the refrigerant vapor in the air-cooled condenser enables the transfer of heat to the atmosphere.
Air-cooled chillers offer the significant advantage of lower installation costs. Simpler maintenance also results due to their relative simplicity as compared to water-cooled chillers. Air-cooled chillers will occupy less space, but will mostly reside outside a facility. Thus, the outdoor elements will compromise their functional lifespan.
The all-inclusive nature of air-cooled chillers reduces maintenance costs. Their relative simplicity coupled with reduced space requirements produces great advantages in many types of installations.
For more info contact water pump dubai or call us at +971 4 252 2966
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When purchasing a new water pump for slurry pumping applications, it's important to consider what else will be in your fluid – which can be everything from dirt and sand to bigger rocks, and even larger debris both natural and manmade. If you're pumping out of a natural body of water, you might even have a fish wander a little too close to your pump intake.
The term "slurry" can refer to a wide variety of pumping situations, but most generally the term refers to dissolved or pulverized solids suspended in a liquid. Different materials can behave in very different ways depending on what you're pumping. If you are running a pump on your pond, you may need to plan primarily for mud, while making sure you know the consistency of the soil so you can plan for the right size pump for such a job.
There are many industrial applications for slurry pumping, as well. Mining and construction operations may often need to drain areas filled with water or other liquids and may require special planning to ensure the right equipment is on site to get the pumping job done. The oil and gas drilling method known as "fracking" also uses this quite a bit, both in the drilling itself as well as recovering the slurry after drilling.
If you use the wrong equipment in slurry pumping, you run the risk of damage to the pump interior from everything ranging from larger objects becoming jammed, to solid particles creating impact damage on the pump walls and impeller, to abrasion and erosion damage from particles corroding over time. If you are choosing a pump for a smaller application, it's important to know the size and consistency of particulate that may be coming into the pump. If you are choosing a pump for an industrial application, consulting a qualified engineer may be necessary to ensure you are buying equipment that will be up to the task at hand.
For more info contact pump suppliers in uae or call us at +971 4 252 2966
The term "slurry" can refer to a wide variety of pumping situations, but most generally the term refers to dissolved or pulverized solids suspended in a liquid. Different materials can behave in very different ways depending on what you're pumping. If you are running a pump on your pond, you may need to plan primarily for mud, while making sure you know the consistency of the soil so you can plan for the right size pump for such a job.
There are many industrial applications for slurry pumping, as well. Mining and construction operations may often need to drain areas filled with water or other liquids and may require special planning to ensure the right equipment is on site to get the pumping job done. The oil and gas drilling method known as "fracking" also uses this quite a bit, both in the drilling itself as well as recovering the slurry after drilling.
If you use the wrong equipment in slurry pumping, you run the risk of damage to the pump interior from everything ranging from larger objects becoming jammed, to solid particles creating impact damage on the pump walls and impeller, to abrasion and erosion damage from particles corroding over time. If you are choosing a pump for a smaller application, it's important to know the size and consistency of particulate that may be coming into the pump. If you are choosing a pump for an industrial application, consulting a qualified engineer may be necessary to ensure you are buying equipment that will be up to the task at hand.
For more info contact pump suppliers in uae or call us at +971 4 252 2966
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A centrifugal water pump is one of the most common types of water pumps available, but how does it work? What are the different parts and what do they do?
How a centrifugal water pump works:
The first thing you need to know is the purpose of a centrifugal water pump. A centrifugal pump is very versatile, and can be used for agriculture, industrial, and many other applications. Their main job is to transport liquid from one place to another.
Some centrifugal water pumps have solids handling capabilities, which means they can move liquids that have solids in them (up to a certain extent), as well as chemicals, making these pumps very popular. Centrifugal pumps are classified as kinetic pumps, and the way centrifugal pumps move a substance is through kinetic energy (motion). This is done through a part called the impeller, which is a large, usually metal rotor, that spins very quickly.
The basic parts of a centrifugal water pump:
Pump Body/Casing
The pump body, or casing, is the external case of a water pump. It’s what houses the impeller, the volute, and all the other internal parts. The pump body is most commonly made of cast iron, due to more economical manufacturing costs, but can also be made of stainless steel, bronze, plastic or other materials. Its main purpose is to house all the internal working parts of the pump. It’s like the case of a computer, in that it keeps all the parts in, and helps protect them.
Volute
A water pump volute is a kind of curved funnel leading to the discharge port that widens out the farther it goes. It is a casing around the impeller that the liquid comes into contact with as it enters the pump. As the water enters the volute, the volute helps decrease the speed/flow of the water or liquid, while increasing the pressure, which helps to balance the pressure on the impeller shaft. The volute can be made of either cast iron, steel, plastic, or bronze.
Some centrifugal pumps incorporate the pump body and volute as one piece, thus the pump body/casing also functions as the volute.
Impeller
The impeller can be made of a variety of materials. The most common are cast iron, bronze, brass, stainless steel and plastic. Bronze and stainless steel are mostly used for ocean water, while temperature resistant steel can be used for hot or cold water. Plastic is most commonly used for chemicals and other caustic and corrosive liquids.
The liquid comes in through the suction port (inlet), which then pushes it towards the pump impeller. As the impeller spins very quickly, it forces the liquid out of the discharge port (outlet). It works much like a vacuum cleaner, in that the energy from the impeller sucks the liquid in, spins it around, and pushes it back out the discharge port at a high rate of speed.
Power
A centrifugal pump can be powered from a variety of power sources. Most commonly, they are powered by an electric motor, a gas or diesel-powered engine, or a hydraulic motor, all which power the pump by driving the shaft that spins the impeller.
Pump Shaft
Another important part of a centrifugal pump is the pump shaft, which is what the impeller is mounted to. The pump shaft connects to the motor or engine, which then powers the impeller and makes it spin. An important part of the shaft is the shaft sleeve, often made of cast iron, stainless steel or bronze which helps to better fit the impeller onto the shaft, as well as protecting the shaft from damage and wear and tear.
For more info contact pump suppliers in uae or call us at +971 4 252 2966
How a centrifugal water pump works:
The first thing you need to know is the purpose of a centrifugal water pump. A centrifugal pump is very versatile, and can be used for agriculture, industrial, and many other applications. Their main job is to transport liquid from one place to another.
Some centrifugal water pumps have solids handling capabilities, which means they can move liquids that have solids in them (up to a certain extent), as well as chemicals, making these pumps very popular. Centrifugal pumps are classified as kinetic pumps, and the way centrifugal pumps move a substance is through kinetic energy (motion). This is done through a part called the impeller, which is a large, usually metal rotor, that spins very quickly.
The basic parts of a centrifugal water pump:
Pump Body/Casing
The pump body, or casing, is the external case of a water pump. It’s what houses the impeller, the volute, and all the other internal parts. The pump body is most commonly made of cast iron, due to more economical manufacturing costs, but can also be made of stainless steel, bronze, plastic or other materials. Its main purpose is to house all the internal working parts of the pump. It’s like the case of a computer, in that it keeps all the parts in, and helps protect them.
Volute
A water pump volute is a kind of curved funnel leading to the discharge port that widens out the farther it goes. It is a casing around the impeller that the liquid comes into contact with as it enters the pump. As the water enters the volute, the volute helps decrease the speed/flow of the water or liquid, while increasing the pressure, which helps to balance the pressure on the impeller shaft. The volute can be made of either cast iron, steel, plastic, or bronze.
Some centrifugal pumps incorporate the pump body and volute as one piece, thus the pump body/casing also functions as the volute.
Impeller
The impeller can be made of a variety of materials. The most common are cast iron, bronze, brass, stainless steel and plastic. Bronze and stainless steel are mostly used for ocean water, while temperature resistant steel can be used for hot or cold water. Plastic is most commonly used for chemicals and other caustic and corrosive liquids.
The liquid comes in through the suction port (inlet), which then pushes it towards the pump impeller. As the impeller spins very quickly, it forces the liquid out of the discharge port (outlet). It works much like a vacuum cleaner, in that the energy from the impeller sucks the liquid in, spins it around, and pushes it back out the discharge port at a high rate of speed.
Power
A centrifugal pump can be powered from a variety of power sources. Most commonly, they are powered by an electric motor, a gas or diesel-powered engine, or a hydraulic motor, all which power the pump by driving the shaft that spins the impeller.
Pump Shaft
Another important part of a centrifugal pump is the pump shaft, which is what the impeller is mounted to. The pump shaft connects to the motor or engine, which then powers the impeller and makes it spin. An important part of the shaft is the shaft sleeve, often made of cast iron, stainless steel or bronze which helps to better fit the impeller onto the shaft, as well as protecting the shaft from damage and wear and tear.
For more info contact pump suppliers in uae or call us at +971 4 252 2966
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When your water pump trying to transport liquids with fibrous, high solid content, or sludge type materials through pipes or hoses. Solid content or sewage waste can wear down or erode normal pumps and get stuck in the discharge apparatuses. Materials need to be filtered or ground with a shredder sewage pump to ensure no damage to the pump which could result in potentially hazardous leaks or spills.
If the materials coming through a water pump can’t be ground up and pipes are continually ground upon, manual cleaning is needed. This takes away from valuable production time, ultimately costing you money. Leaks can also end up costing you money when you must replace your pump prematurely. When it comes to pumping of animal waste or other hazardous materials, a leaky pump could face EPA violations which could lead to significant fines.
Water pump dubai have worked with farmers and municipalities to design products that are durable, reliable, and safe. These pumps are manufactured for applications including, but not exclusive to: dirty water drainage, sewage pumping stations, septic tanks, flood relief, and sludge removal. These submersible shredder sewage pumps include a number of special features to ensure proper processing and discharge of materials:
For more info contact pump suppliers in uae or call us at +971 4 252 2966
If the materials coming through a water pump can’t be ground up and pipes are continually ground upon, manual cleaning is needed. This takes away from valuable production time, ultimately costing you money. Leaks can also end up costing you money when you must replace your pump prematurely. When it comes to pumping of animal waste or other hazardous materials, a leaky pump could face EPA violations which could lead to significant fines.
Water pump dubai have worked with farmers and municipalities to design products that are durable, reliable, and safe. These pumps are manufactured for applications including, but not exclusive to: dirty water drainage, sewage pumping stations, septic tanks, flood relief, and sludge removal. These submersible shredder sewage pumps include a number of special features to ensure proper processing and discharge of materials:
- Durable cast iron construction with stainless steel motor housing - ensures dependable function and worry-free operation
- Carbide tipped shredder impeller - prevents clogging and reduces maintenance when cutting through stringy, fibrous and sludgy type waste
- Spiral shredder plate with hardened surface - enhanced cutting ability
- Double mechanical seals plus shaft seal - upper: carbon/ceramic with Buna-N elastomers, lower: silicon carbide with elastomers, prevents unnecessary leakage
For more info contact pump suppliers in uae or call us at +971 4 252 2966
- Published on
The right irrigation pump ensures that the water requirements are met for your crops as well as provides the best efficiency to get the most out of the layout of your field.
Understanding the Basics
Though there are several types of irrigation techniques in practice, the goal is the same – to pump water from the source and to distribute it evenly within the field. The aim here is to keep the energy requirements low while ensuring that all plants receive adequate amounts of water – neither too low nor too high.
Modern irrigation techniques can meet these goals with the help of the right water pumps. To ensure uniform irrigation of a field, the entire cultivable area is divided into smaller regions called as zones. Zones can be segregated based on soil types, crops cultivated, and irrigation requirements and so on. Each zone is watered with the help of pipes, tubes, sprinklers, and valves, which are connected to a pump.
The entire field is divided into zones because a single sprinkler doesn’t have the required pressure and flow to irrigate the whole area at a time. An irrigation controller (it can either be mechanical, electrical, or digital) is responsible for turning on and off the sprinklers in a particular zone at a specific time.
Step 1 – Choose your Irrigation Equipment
Different equipment requires different amounts of water and pressure. Hence, it’s vital that you choose the equipment first before selecting your pump. While choosing irrigation equipment, make sure to consider the controller.
The controller plays a crucial role in turning off and on water supply at specified periods, or during rains, heavy winds, direct sunlight, etc. The controller is responsible for water conservation, as it turns off the pump at a pre-set time, so that water seeps adequately into the soil. This reduces runoff and infiltration.
Today, smart pump controllers are gaining popularity. These devices use plenty of data like soil humidity, weather, moisture and rain sensors to determine optimal water requirements for your crops.
Step 2 – Consider the Water Source Type
The rule of thumb for successful irrigation is adequate access to water. Just a few decades ago, water was considered as an infinite resource. Sadly, the situation is reversed today, and there is an acute shortage of water in all regions of the country. This means you need to take the right steps to ensure that water is managed efficiently in your field.
The general sources of irrigation water include groundwater from wells, springs or bore wells, surface water from lakes, rivers, reservoirs and other non-conventional sources of water like reclaimed water, drainage water, desalinated water, wastewater and so on.
Step 3 – Determining the Irrigation Pump Type
The location of the water source plays a crucial role in determining the type of pump. Here’s a general guide on what pump works well for different water sources:
While choosing water pumps, it’s considered a best practice to use more than one pump. Instead, of a single large pump, using several small pumps offers various benefits like – reduced aquifer drawdown, decreased energy consumption, easy cut in/cut off pumps based on varying requirements, etc.
Step 4 – Figuring out the Right Pump Size
Generally, irrigation pump used in irrigation are either over-sized or under-sized. Choosing the correct pump size is essential for the success of your irrigation system.
Some factors to consider while deciding on the pump size are:
Step 5 – Calculate the Efficiency of the Pump
Calculating the overall efficiency of the system is a must before the final irrigation pump selection is made. The electricity costs depend on how many kW the motor runs on. The pumps and the motors in the system have varying efficiencies.
Here’s a simple formula to calculate the efficiency:
Efficiency% = Q * H / 3.67 * P1
Step 6 – Don’t forget System Integration
Today, pumps are no longer stand-alone devices. They have to be integrated with the rest of the irrigation system. This means the pump you choose must match the irrigation equipment perfectly for the best results.
All the elements listed above must be integrated to provide the maximum cost savings to the modern farmer. You can reduce operational costs by ensuring that the water pressure is not higher than required and by using the right controls. Similarly, maintaining the correct water flow and pressure translates to more energy savings.
Water delivered at the right precision and at the right time to the crops results in higher yields, better harvests, thereby increasing profitability. Apart from profits, the right pump also ensures better water management, thus making sustainable agricultural practices a possibility.
For more info contact water pump dubai or call us at +971 4 252 2966
Understanding the Basics
Though there are several types of irrigation techniques in practice, the goal is the same – to pump water from the source and to distribute it evenly within the field. The aim here is to keep the energy requirements low while ensuring that all plants receive adequate amounts of water – neither too low nor too high.
Modern irrigation techniques can meet these goals with the help of the right water pumps. To ensure uniform irrigation of a field, the entire cultivable area is divided into smaller regions called as zones. Zones can be segregated based on soil types, crops cultivated, and irrigation requirements and so on. Each zone is watered with the help of pipes, tubes, sprinklers, and valves, which are connected to a pump.
The entire field is divided into zones because a single sprinkler doesn’t have the required pressure and flow to irrigate the whole area at a time. An irrigation controller (it can either be mechanical, electrical, or digital) is responsible for turning on and off the sprinklers in a particular zone at a specific time.
Step 1 – Choose your Irrigation Equipment
Different equipment requires different amounts of water and pressure. Hence, it’s vital that you choose the equipment first before selecting your pump. While choosing irrigation equipment, make sure to consider the controller.
The controller plays a crucial role in turning off and on water supply at specified periods, or during rains, heavy winds, direct sunlight, etc. The controller is responsible for water conservation, as it turns off the pump at a pre-set time, so that water seeps adequately into the soil. This reduces runoff and infiltration.
Today, smart pump controllers are gaining popularity. These devices use plenty of data like soil humidity, weather, moisture and rain sensors to determine optimal water requirements for your crops.
Step 2 – Consider the Water Source Type
The rule of thumb for successful irrigation is adequate access to water. Just a few decades ago, water was considered as an infinite resource. Sadly, the situation is reversed today, and there is an acute shortage of water in all regions of the country. This means you need to take the right steps to ensure that water is managed efficiently in your field.
The general sources of irrigation water include groundwater from wells, springs or bore wells, surface water from lakes, rivers, reservoirs and other non-conventional sources of water like reclaimed water, drainage water, desalinated water, wastewater and so on.
Step 3 – Determining the Irrigation Pump Type
The location of the water source plays a crucial role in determining the type of pump. Here’s a general guide on what pump works well for different water sources:
- Turbine pumps and deep-well submersible pumps are suitable to draw water from deep underground, think wells, bore-wells, etc.
- When it comes to surface water, you can use several different types of pumps. One advantage of using submersible pumps with groundwater is that the pump is not visible, thereby reducing chances of theft and reduced pump operation noise.
While choosing water pumps, it’s considered a best practice to use more than one pump. Instead, of a single large pump, using several small pumps offers various benefits like – reduced aquifer drawdown, decreased energy consumption, easy cut in/cut off pumps based on varying requirements, etc.
Step 4 – Figuring out the Right Pump Size
Generally, irrigation pump used in irrigation are either over-sized or under-sized. Choosing the correct pump size is essential for the success of your irrigation system.
Some factors to consider while deciding on the pump size are:
- Power consumption
- System pressure
- Variable speed controls
- Motor protection
Step 5 – Calculate the Efficiency of the Pump
Calculating the overall efficiency of the system is a must before the final irrigation pump selection is made. The electricity costs depend on how many kW the motor runs on. The pumps and the motors in the system have varying efficiencies.
Here’s a simple formula to calculate the efficiency:
Efficiency% = Q * H / 3.67 * P1
- Here, Q = water flow measured in m3/h
- H = head pressure measured in meters
- P1 = the kW of the motor
Step 6 – Don’t forget System Integration
Today, pumps are no longer stand-alone devices. They have to be integrated with the rest of the irrigation system. This means the pump you choose must match the irrigation equipment perfectly for the best results.
All the elements listed above must be integrated to provide the maximum cost savings to the modern farmer. You can reduce operational costs by ensuring that the water pressure is not higher than required and by using the right controls. Similarly, maintaining the correct water flow and pressure translates to more energy savings.
Water delivered at the right precision and at the right time to the crops results in higher yields, better harvests, thereby increasing profitability. Apart from profits, the right pump also ensures better water management, thus making sustainable agricultural practices a possibility.
For more info contact water pump dubai or call us at +971 4 252 2966
- Published on
Slurry pumps works in series are widely used to match some requirements. It will supply higher head to the pump system. First pump outlet connect to next pump inlet, this is how it works.
Bellow we will talk what conditions need the pumps work in this way and the things we should know as they working in series.
Some conditions need slurry pump work in series
1.One slurry pump can not match the work head requirement.
2.Higher head and larger flow need to rise at the same time.
3.Too long transport distance
4.Change the followed slurry pump cavitation performance in series
Things you should know`to deal with slurry pump in series
1.Choose the same pump in series working, avoid one pump over work or low efficiency
2.Thinking the followed Slurry pumps Max pressure strength can handle
3.High pressure for followed pumps make it should be care for bearings and seal
4.Closed the outlet valves before starting, and the open it from first to end
For more info contact water pump dubai or call us at +971 4 252 2966
Bellow we will talk what conditions need the pumps work in this way and the things we should know as they working in series.
Some conditions need slurry pump work in series
1.One slurry pump can not match the work head requirement.
2.Higher head and larger flow need to rise at the same time.
3.Too long transport distance
4.Change the followed slurry pump cavitation performance in series
Things you should know`to deal with slurry pump in series
1.Choose the same pump in series working, avoid one pump over work or low efficiency
2.Thinking the followed Slurry pumps Max pressure strength can handle
3.High pressure for followed pumps make it should be care for bearings and seal
4.Closed the outlet valves before starting, and the open it from first to end
For more info contact water pump dubai or call us at +971 4 252 2966
- Published on
If you use a well for drinking or irrigation or you’ve needed to remove standing water, you’ve probably used a submersible pump. Submersible pumps are a type of centrifugal pump designed to operate while fully submerged. They are also referred to as sub pumps or electric submersible pumps (ESP).
A wide variety of submersible pumps are available for various applications. Regardless of the pump type, there are some features they all share. In order to operate, they must be completely submerged in the pumped media and the pump motor must be completely sealed.
Submersible Pump Types
Well water pumps are a variation of well pumps first used in the oil industry in the 1920s. They are cylindrical in shape so that they can easily be lowered down a well and are typically 3” - 4” in diameter. Compared to depth limitations of other types of pumps, submersible well water pumps can operate at depths up to 400 feet. There are two types of potable water pumps, shallow-well and deep-well.
Well Pump; Source: Goulds Water Technology
Dewatering pumps are used to remove standing water in construction, mining and sump applications. Dewatering pumps are designed for water or water with light suspended solids.
Sand, sludge and slurry pumps are heavy-duty pumps designed for the demanding application of removing large, stringy, fibrous or abrasive solids.
Solids-handling pumps are designed for handling materials such as mud, raw sewage, viscous liquids, wood chips, wastewater and other solids. Shredder pumps, also referred to as cutter pumps, cut or shear the material prior to pumping.
Submersible pumps for use in oil wells are typically electrical submersible pumps, driven by electric power. ESPs are multistage centrifugal pumps with a three-phase induction motor and a sealed chamber section. They also have a surface power control system that supplies electricity to the pump through a power cable.
Operating Principal
In submersible pumps, the sealed motor turns an impeller, which is enclosed in the pump housing. The pump may include an intake screen, which filters out anything that is too large to pump. As the impeller rotates, pressure pushes the media into the pump inlet and the impeller accelerates the fluid and forces it into the discharge line. It is important to keep submersible pumps fully submerged while operating as they are not designed to work in air. As the pump is submerged, it eliminates the need for priming the pump and prevents cavitation.
Submersible pumps should not be confused with jet pumps, which are also used in well applications. Jet pumps are centrifugal pumps with a venturi nozzle attached at the discharge outlet. They operate based on Bernoulli's principle, using constriction to reduce pressure and provide suction. After the pump is primed a motive fluid is pumped through a standard centrifugal pump and enters an ejector. At the throat of the converging section of the ejector, the pressurized fluid is ejected at high velocity. This creates a low pressure (vacuum) at the throat, drawing the target fluid (from a well or other source) up into the nozzle.
Submersible pumps should be used for wells with depths of 25 feet to 400 feet. Shallow well jet pumps should be used for wells 25 feet or less and deep well jet pumps can be used for depths between 25 feet and 110 feet.
For more info visit water pump dubai or call us at +971 4 252 2966.
For pump service and repair contact us today
- Published on
Chilled Water System Basics - Chilled water systems work much the same way as direct expansion systems work. The exception is they use water in the coil rather than refrigerant. Technically speaking, water can be classified as a refrigerant. Chilled Water systems can be rather complex and many chilled water systems are found in commercial and industrial applications. There are some chilled water systems used in residential applications.
Chilled Water System BasicsHowever, chilled water systems in residential HVAC systems are extremely rare. A typical chiller uses the process of refrigeration to chill water in a chiller barrel. This water is pumped through chilled water piping throughout the building where it will pass through a coil. Air is passed over this coil and the heat exchange process takes place. The heat in the air is absorbed into the coils and then into the water. The water is pumped back to the chiller to have the heat removed. It then makes the trip back through the building and the coils all over again.
How a Chilled Water System Works - Chilled Water System Basics
Residential Chiller
The chiller basically removes heat from the water. It is used as a refrigerant to remove heat from the building. The chilled water circulates through a chilled water loop and through coils located in air handlers. Chilled water systems include other HVAC equipment designed to exchange heat such as computer room air conditioners. The chilled water absorbs the heat from the building. It then returns to the chiller where the chiller removes the heat from the water using the refrigeration process. Some chilled water loop arrangements are very complex while others are simple. Control of the chilled water from pressure to velocity, to volume, is up to the control system controlling the pumps and valve actuators in the system.
Chillers range in size from smaller than 5 tons all the way up to several hundred tons. Chillers can be found in residential applications, commercial buildings, and industrial process applications.
Chillers and Cooling Towers - Chilled Water System BasicsMany chillers have cooling towers where the heat removed in the chiller barrel is transferred to another barrel. It is the condenser barrel where the refrigerant is condensed and sent back to the evaporator barrel to remove the heat. The process is in reverse in the condenser barrel. The water absorbs heat from the refrigerant and allows it to condense.
The water is then transferred to a cooling tower where the heat in this water is removed to the atmosphere. Once the heat is removed from the water it is pumped back to the chiller barrel to absorb more heat from the refrigerant. Some chillers do not have a condenser barrel to remove the heat. The refrigerant is pumped into a condenser coil where a fan blows across the coil and removes the heat. These chillers are cheaper to purchase upfront but not as efficient to run as those with the condenser barrels. The upfront costs are less but the energy costs are more over the long run. One bonus to an air cooled chiller is that it does not require a cooling tower and therefore the maintenance costs associated with maintaining a cooling tower.
Chilled Water System Basics - Chilled Water and Direct Expansion
Modular Chillers
Chilled water systems provide comfort to mainly commercial buildings and are typically cheaper to operate than Direct Expansion (DX) systems. While many buildings have DX systems in the way of large rooftop units, the cost of installation is generally cheap for the DX systems because all that is required to install them is ductwork and electrical service to the unit. With chilled water systems, chilled water piping must be installed throughout the building and this can be far more expensive to install over the plain old DX rooftop units which supply conditioned air to a VAV system that has electric reheat in them.
Of course, adding state of the art controls like direct digital controls can improve any system and take energy management to a whole new level of control and savings. So whether your building utilizes chilled water or DX systems it will save energy dollars by adding a state of the control system like DDC or direct digital controls to make it work as efficiently as possible. In the picture, below left, a chilled water pipe had to be relocated. The gate valve that shut the water off to that section of the loop was broken and could not be closed.
Pipe Freeze Machine
Cooling Tower for Chilled Water System
To prevent water from flooding all over the floor and in the space where the relocation of the chilled water piping was necessary, a piping freeze machine was used to stop the flow of water so that the chilled water pipe could be cut and re-soldered to accommodate its new location. Pipe freezing also allows the new piping to be soldered into place because it prevents water flow inside the pipe. Copper pipe cannot be soldered if it has water inside it. For years plumbers and HVAC technicians used bread or a mechanical stop to keep water out of the pipe so it can be soldered. The bread rolled into a ball and inserted into the pipe, would prevent the water from forming around the solder joint allowing it to be soldered.
Later, when full flow is restored, the bread breaks up and is caught in a strainer where it can be removed from the system. With the freeze machine, once the water thaws, there is no bread to contaminate the system or plug the strainers.
For more info visit water pump dubai or call us at +971 4 252 2966
For pump repair and service or call us +971 4 252 2966
Chilled Water System BasicsHowever, chilled water systems in residential HVAC systems are extremely rare. A typical chiller uses the process of refrigeration to chill water in a chiller barrel. This water is pumped through chilled water piping throughout the building where it will pass through a coil. Air is passed over this coil and the heat exchange process takes place. The heat in the air is absorbed into the coils and then into the water. The water is pumped back to the chiller to have the heat removed. It then makes the trip back through the building and the coils all over again.
How a Chilled Water System Works - Chilled Water System Basics
Residential Chiller
The chiller basically removes heat from the water. It is used as a refrigerant to remove heat from the building. The chilled water circulates through a chilled water loop and through coils located in air handlers. Chilled water systems include other HVAC equipment designed to exchange heat such as computer room air conditioners. The chilled water absorbs the heat from the building. It then returns to the chiller where the chiller removes the heat from the water using the refrigeration process. Some chilled water loop arrangements are very complex while others are simple. Control of the chilled water from pressure to velocity, to volume, is up to the control system controlling the pumps and valve actuators in the system.
Chillers range in size from smaller than 5 tons all the way up to several hundred tons. Chillers can be found in residential applications, commercial buildings, and industrial process applications.
Chillers and Cooling Towers - Chilled Water System BasicsMany chillers have cooling towers where the heat removed in the chiller barrel is transferred to another barrel. It is the condenser barrel where the refrigerant is condensed and sent back to the evaporator barrel to remove the heat. The process is in reverse in the condenser barrel. The water absorbs heat from the refrigerant and allows it to condense.
The water is then transferred to a cooling tower where the heat in this water is removed to the atmosphere. Once the heat is removed from the water it is pumped back to the chiller barrel to absorb more heat from the refrigerant. Some chillers do not have a condenser barrel to remove the heat. The refrigerant is pumped into a condenser coil where a fan blows across the coil and removes the heat. These chillers are cheaper to purchase upfront but not as efficient to run as those with the condenser barrels. The upfront costs are less but the energy costs are more over the long run. One bonus to an air cooled chiller is that it does not require a cooling tower and therefore the maintenance costs associated with maintaining a cooling tower.
Chilled Water System Basics - Chilled Water and Direct Expansion
Modular Chillers
Chilled water systems provide comfort to mainly commercial buildings and are typically cheaper to operate than Direct Expansion (DX) systems. While many buildings have DX systems in the way of large rooftop units, the cost of installation is generally cheap for the DX systems because all that is required to install them is ductwork and electrical service to the unit. With chilled water systems, chilled water piping must be installed throughout the building and this can be far more expensive to install over the plain old DX rooftop units which supply conditioned air to a VAV system that has electric reheat in them.
Of course, adding state of the art controls like direct digital controls can improve any system and take energy management to a whole new level of control and savings. So whether your building utilizes chilled water or DX systems it will save energy dollars by adding a state of the control system like DDC or direct digital controls to make it work as efficiently as possible. In the picture, below left, a chilled water pipe had to be relocated. The gate valve that shut the water off to that section of the loop was broken and could not be closed.
Pipe Freeze Machine
Cooling Tower for Chilled Water System
To prevent water from flooding all over the floor and in the space where the relocation of the chilled water piping was necessary, a piping freeze machine was used to stop the flow of water so that the chilled water pipe could be cut and re-soldered to accommodate its new location. Pipe freezing also allows the new piping to be soldered into place because it prevents water flow inside the pipe. Copper pipe cannot be soldered if it has water inside it. For years plumbers and HVAC technicians used bread or a mechanical stop to keep water out of the pipe so it can be soldered. The bread rolled into a ball and inserted into the pipe, would prevent the water from forming around the solder joint allowing it to be soldered.
Later, when full flow is restored, the bread breaks up and is caught in a strainer where it can be removed from the system. With the freeze machine, once the water thaws, there is no bread to contaminate the system or plug the strainers.
For more info visit water pump dubai or call us at +971 4 252 2966
For pump repair and service or call us +971 4 252 2966
- Published on
Horizontal multistage pumps are some of the best and most popular pumps on the market. They are energy efficient and come with a flexible range of flow and head, which makes them very useful for a variety of projects. We want to look at little closer at how the pumps work and operate and what types of applications are most commonly used with these pumps.
More about Centrifugal multistage pumps
These types of pumps have multiple stages or liquid chambers that are all connected together in a series. Every time the fluid (typically water) enters a chamber, the suction line pressure goes up. Then when the fluid leaves the first chamber and enters the second chamber the pressure goes up again. As you can see, if the fluid follows this pattern then the more stages it passes through, the higher the pressure will be. Even though the pressure goes up, the flow range remains relatively constant for the given rpm. These pumps are designed to enable the liquid to travel longer distances with more pressure.
Horizontal Centrifugal Multistage Pumps
When you choose to use a horizontal multistage pump you may find that they handle higher flow rates than their sibling, the vertical multistage pump (except for vertical turbine pumps). The horizontal one has modular interstate components that are segmented in the casing. High pressures commonly use this type of assembly because the rotating assembly is held between bearing housings. In applications where liquids need to be transported with high levels of pressure, these pumps are perfect for the job. Multiple stages or impellers in the body of the pump, make it possible to transport the liquid at high pressures. If you think a horizontal multistage pump is the one you need for your job, be sure to utilize a qualified engineer to give you the green light to proceed.
Pressure boosting systems commonly employ these pumps. These circumstances usually demand a constant flow and pressure. Some of the most common projects that will use a horizontal multistage pump are:
These pumps can all be run and driven by a few different options. You can use motor options, diesel motor options, or solar powered electric motor options. You will have to be aware that these pumps take a high skill level to maintain and work on them. You can’t just take them apart without knowing how to put them back together correctly. They also can be pretty costly upfront depending on what you want them made out of and how specialized you want them. However, they are well worth the investment.
For more info visit water pump dubai or call us at +971 4 252 2966
For pump repair and service contact us today or call us at +971 4 252 2966.
More about Centrifugal multistage pumps
These types of pumps have multiple stages or liquid chambers that are all connected together in a series. Every time the fluid (typically water) enters a chamber, the suction line pressure goes up. Then when the fluid leaves the first chamber and enters the second chamber the pressure goes up again. As you can see, if the fluid follows this pattern then the more stages it passes through, the higher the pressure will be. Even though the pressure goes up, the flow range remains relatively constant for the given rpm. These pumps are designed to enable the liquid to travel longer distances with more pressure.
Horizontal Centrifugal Multistage Pumps
When you choose to use a horizontal multistage pump you may find that they handle higher flow rates than their sibling, the vertical multistage pump (except for vertical turbine pumps). The horizontal one has modular interstate components that are segmented in the casing. High pressures commonly use this type of assembly because the rotating assembly is held between bearing housings. In applications where liquids need to be transported with high levels of pressure, these pumps are perfect for the job. Multiple stages or impellers in the body of the pump, make it possible to transport the liquid at high pressures. If you think a horizontal multistage pump is the one you need for your job, be sure to utilize a qualified engineer to give you the green light to proceed.
Pressure boosting systems commonly employ these pumps. These circumstances usually demand a constant flow and pressure. Some of the most common projects that will use a horizontal multistage pump are:
- Dewatering
- Boiler feed systems
- Reverse Osmosis
- Industrial applications
- Condensate
- High pressure cleaning/wash down facilities
- Irrigation and fire hose feel supply
- Showers
- Spray
- Pressure Boosting
These pumps can all be run and driven by a few different options. You can use motor options, diesel motor options, or solar powered electric motor options. You will have to be aware that these pumps take a high skill level to maintain and work on them. You can’t just take them apart without knowing how to put them back together correctly. They also can be pretty costly upfront depending on what you want them made out of and how specialized you want them. However, they are well worth the investment.
For more info visit water pump dubai or call us at +971 4 252 2966
For pump repair and service contact us today or call us at +971 4 252 2966.
