Common Faults and Preventive Measures of Pressure Reducing Valve
Classification:
Release Time：2017-09-18
1. automatic valve common faults and preventive measures, the valve is blocked. Especially in the transport of some of the more impurities in the fluid, in most cases the transport of the fluid has a certain amount of impurities, in the transport of these fluids must often be filtered to avoid clogging. Failure analysis: 1. The control channel is small and easy to be blocked by debris; 2. The piston is stuck in the highest position due to rust stains; A filter must be installed before the piston pressure relief valve; For newly installed or long-term deactivated pressure relief valves, they must be disassembled for inspection and cleaning. The valve is straight through and does not have a decompression effect. The piston in the 2. valve will often fail,
1. automatic valve common faults and preventive measures, the valve is blocked. Especially in the transport of some of the more impurities in the fluid, in most cases the transport of the fluid has a certain amount of impurities, in the transport of these fluids must often be filtered to avoid clogging.
Failure analysis:
1. The control channel is small and easy to be blocked by debris;
2. The piston is stuck in the highest position due to rust stains; a filter must be installed before the piston pressure relief valve; for newly installed or long-term deactivated pressure relief valve, it must be disassembled for inspection and cleaning. The valve is straight through and does not have a decompression effect.
The piston in the 2. valve will often fail. When the piston is under pressure inside the valve, it will generate downward pressure. If its upper part is under great pressure but cannot exert force down the channel, it will be stuck. Such a failure is mainly due to the adhesion of some rust on the piston, which will be corroded and rusted in a humid environment.
Failure analysis:
1. The piston is stuck in a certain position;
2. The valve handle of the main valve is stuck at a certain position of the guide hole of the cylinder disc;
3, the main valve disc lower spring fracture or failure;
4, pulse valve valve handle in the seat hole a certain position stuck, so that the piston is always under pressure;
5, the main valve and the main valve seat between the two sealing surfaces, there is dirt stuck or scratches;
6. The diaphragm fails due to fatigue or damage. For the pressure reducing valve, special emphasis should be placed on regular inspection.
Solution:
If dirt and rust stains are found, they must be removed in time. Piston ring damage should be updated; Spring failure should be replaced with usable; If the sealing surface is not close, it should be ground again. If the diaphragm is not working, it should be replaced. If it is confirmed that the valve handle is coarse after use, it should be sanded with sandpaper.
The pressure cannot be adjusted after the 3. valve. In addition to the above faults, it also includes:
1. The regulating spring fails;
2. The cap seam leaks and cannot maintain pressure. Need timely inspection and treatment to prevent.
In addition, there is a phenomenon that the pressure pulse after the valve fluctuates and is extremely unstable. This is the input medium and the output medium difference is too large, should re-select the valve diameter equivalent valve. There is also a cause of pressure instability after the valve is that the adjustment spring is not properly selected; different nominal pressure reducing valve, the adjustment spring is also different.
Related News
2026/02/28
Contact Information
+86 27-8970 8339
Address: No.5, Zhengjie, Shuangliu Street, Xinzhou District, Wuhan City, Hubei Province