Dxb Solutions is the leading supplier for Nema pressure tank in UAE .
nema - your smart choice for hydraulic applications.
Durable and reliable: As a manufacturer of high-quality diaphragm pressure expansion vessels, Nema Winkelmann is able to draw on the expertise and optimised processes of the Winkelmann Group.
In its modern factory in the Turkish city of Düzce, the company produces a wide variety of high-performance pressure expansion vessels for heating and cool- ing systems, potable water and sanitary water systems as well as hot water storage systems.
Because Nema Winkelmann concen- trates on what is really important, these products provide the perfect solutions to numerous challenges in building technology applications involving the supply and delivery of water. Our vessels meet the most stringent require- ments not only with regards to quality and reliability but also in terms of increas- ing cost sensitivity and time pressure during installation and assembly.
In accordance to ISO ISO 9001:2015 Quality Management System, all processes have been streamlined with most attention to quality, hence cus- tomer satisfaction. All our products are designed, manufactured andcertified according to EN 13831 and PED 2014/68/EU respectively.
Pressure is created in heating and cooling systems by temperature and process -inherent volume changes in the water system.
The pressure in a systems is maintained by the functional principle of an expansion vessel which absorbs these changes in volume and therefore largely keeps the pressure constant.
SCOPE OF APPLICATIONS
Water Supply Applications
In booster systems, vessels are used as buffer tanks to intermediately store the difference between the pumpedvolume flow and the volume flow actu- ally needed. Vessels are also required to decrease the switching frequency of a pump and reduce peak loads.
The pressurised cushion of air in the gas space is set approximately below the pump’s switch-on pressure. When pressure falls below the switch-on pressure, the pump switches on and pumps water. If consumers remove a relatively small volume of water, the difference in the buffer vessel is stored until the pressurised cushion of air on the switch-off side has compressed and the booster system has switched off. When consumers take water, the interim water is taken from the buffer vessel until the pres- surised cushion of air has fallen to the switch-on pressure and the booster system switches on again.
Sanitary Hot Water Applications
When heating sanitary water, pressure rises as the water expands. In the worst case, the excess pressure is decreased by a safety valve, losing valuable heated potable water. The use of a Nema expansion vessel remedies this situation by preventing the unnecessary opening of the safety valve and providing for a moreefficient, resource-conserving opera- tion of the system.
In closed heating-cooling systems, the water expands or contracts as the system is heated up or cooled down. Expansion vessels are used
to compensate for the fluctuations involume between maximum and minimum temperature within a
Nema expansion vessels are used to maintain pressure in heating, cooling and solar power systems. The pres- surised cushion of gas supports the water column within the system and is set before a reserve of water is poured into the vessel. When the sys- tem heats up, the pressure rises andexpansion water flows from the exter- nal system into the water space: the pressurised cushion of air in the gas space is compressed. When the system cools down and its pressure drops, this counter pressure pushes water from the membrane back into the system. This releases the pressur- ised cushion of air in the gas space.