How should the water treatment reverse osmosis pressure switch be debugged?
Low pressure switch has two adjustable screws, one is to adjust the base pressure, generally 0-6bar, one is to adjust the return pressure, generally 0-2bar, can be adjusted against the screwdriver. Common low-pressure switch is always jumping there are two possibilities, one is the raw water pressure fluctuations in large changes, the other is the base pressure in the raw water pressure value of the neighborhood and back to the differential pressure is small.
Raw water pressure fluctuations solution to the pretreatment equipment exhaust, increase the opening of the raw water pump outlet valve, so that the pressure of raw water is relatively large, it is not easy to jump.
Differential pressure is small solution
1, first observe the normal operation of the equipment pressure, the base pressure adjustment than it is slightly lower, such as pretreatment water pressure is 2.5bar, then the base pressure can be adjusted to 2bar;
2, set the pressure value of low-pressure jump, for example, when the raw water pressure is lower than 1.5bar when the pressure switch starts to jump, then the differential pressure adjustment to 0.5bar;
3, although after adjustment, but the accuracy of the adjustment is also a difference, so, according to the actual pressure with the situation to adjust, until it reaches their requirements, such as 2bar pressure when the pressure is suction, 1.5bar pressure when the jump open (this time you can adjust the high pressure pump valve or raw water pump outlet valve to pressure adjustment).
4, if you want to make the pressure differential amplitude, you can also adjust the differential pressure to 0.8-1.0bar, so that the pressure reaches 2bar when the suction, and in the pressure is lower than 1bar when the jump open.