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A pressure switch is most often used to turn a water pump on and off by sensing a change in system pressure. A pressure switch will sense when a predetermined pressure point is reached and will open or close an electrical switching element.
In addition, switches can be used to control air compressor pumps. They are commonly used to make or break electrical circuits at selected pressures or other devices such as alarms used in many industrial applications.
Pressure switches are rated under NEMA, the National Electrical Manufacturers Association, ranging from 1-13 for different uses.
All pressure switches have two operating points known as the cut-in and cut-out. The cut-in point, also known as the reset point, is a result of falling pressure and starts the pump. The cut-out point, also known as the trip point, is a result of rising pressure and stops the pump.
Turn the nut on the large spring clockwise to raise both the cut-in and cut-out pressure. Turn the nut counterclockwise to lower both the cut-in and cut-out pressure settings.
For accuracy and to optimize the life of the switch, the cut-in and cut-out set points should be in the middle of the operating pressure range.
Following the presentation, this technical sheet outlining the minimum and maximum cut-in and cut-out ranges will be available for download for your reference.
Differential, also known as the dead-band, is the difference or spread between the cut-in and cut-out points. On most switches, the differential between the cut-in and cut-out can be adjusted, however, some switches have fixed, non-adjustable differentials. Some applications require a wider or narrower spread between the pump-on and pump-off set-points. To adjust, turn the nut on the small spring clockwise to raise only the cut-out pressure. Turning it counterclockwise will lower the cut-out pressure only.
Now, we will look at connection types.
¼” FPT connections are the most common and are ideal for installing on tank tees. They typically use 3” nipples to lift the switch up high enough to allow the replacement of the pressure gauge without removing the switch. They can also be easily adapted to connect to tubing using barbed tube, compression or quick connects for any pressure connection desired.
For more info contact booster pump suppliers in uae or call us at +971 4 252 2966
In addition, switches can be used to control air compressor pumps. They are commonly used to make or break electrical circuits at selected pressures or other devices such as alarms used in many industrial applications.
Pressure switches are rated under NEMA, the National Electrical Manufacturers Association, ranging from 1-13 for different uses.
All pressure switches have two operating points known as the cut-in and cut-out. The cut-in point, also known as the reset point, is a result of falling pressure and starts the pump. The cut-out point, also known as the trip point, is a result of rising pressure and stops the pump.
Turn the nut on the large spring clockwise to raise both the cut-in and cut-out pressure. Turn the nut counterclockwise to lower both the cut-in and cut-out pressure settings.
For accuracy and to optimize the life of the switch, the cut-in and cut-out set points should be in the middle of the operating pressure range.
Following the presentation, this technical sheet outlining the minimum and maximum cut-in and cut-out ranges will be available for download for your reference.
Differential, also known as the dead-band, is the difference or spread between the cut-in and cut-out points. On most switches, the differential between the cut-in and cut-out can be adjusted, however, some switches have fixed, non-adjustable differentials. Some applications require a wider or narrower spread between the pump-on and pump-off set-points. To adjust, turn the nut on the small spring clockwise to raise only the cut-out pressure. Turning it counterclockwise will lower the cut-out pressure only.
Now, we will look at connection types.
¼” FPT connections are the most common and are ideal for installing on tank tees. They typically use 3” nipples to lift the switch up high enough to allow the replacement of the pressure gauge without removing the switch. They can also be easily adapted to connect to tubing using barbed tube, compression or quick connects for any pressure connection desired.
For more info contact booster pump suppliers in uae or call us at +971 4 252 2966
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