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Adjustable pressure reducing valve stringing problem is not a common phenomenon, but it is also possible failure problems, as a user, we still need to understand, and to grasp the reasons for analysis and resolution: In the course of the use of Why is the pressure regulator valve stringing problems? Due to the rupture of the pipe network at the back of the pressure reducing valve and the closing of the valve at P1 or the overhaul of the pump at the pump station A, the water pressure at the pipe section downstream of the valve is very low or even empty. When the normal water supply is restored, when the valve at the front of the pressure reducing valve suddenly opens or the pump of the pump station A is turned on, the pressure at the front pipe section of the pressure reducing valve rapidly increases, and there is a short period of time between the front pipe section and the rear pipe section of the adjustable pressure reducing valve Large pressure differential, the valve too late to work, pressure relief valve on the cavity pressure is very small, in this larger pressure-driven, the pressure relief valve is forced to open, leading to pressure reducing valve before and after the pressure tends to balance, decompression Short-term valve failure, that string pressure. Since it has appeared, and when to solve it? The following summarizes the three: 1, based on the working principle of the valve, the valve installed after a relief valve, when the pressure after the valve when the pressure is higher than P2, the pressure relief valve opens the pressure relief to protect the A Village The normal water pressure. 2, by other means to shorten the string pressure of time, so close to 0. 3, according to the working principle of the adjustable pressure reducing valve, appropriately increase the diameter of the pilot valve and the conduit to reduce the pressure on the upper and lower chamber to balance the time, or even tend to 0 time difference. Through practical verification, the second scheme described above is the most economical and practical, and can be rapidly opened by the drain valve to make the pressure in the cavity of the diaphragm larger than the pressure in the lower chamber to prompt the rapid recovery of the adjustable pressure relief valve normal. Stringing time is basically 0.
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