Common faults and troubleshooting methods for pressure reducing valves/pressure regulators Fault phenomenon: unstable pressure fluctuation analysis:
1. Air in the oil
2. Damping holes are sometimes blocked
3. The roundness of the spool and the valve body exceeds the specified limit, causing the valve to become stuck
4. The spring is deformed or stuck in the spool, making the slide move difficult or the spring is too soft
5. The steel ball is not round, the steel ball is not well matched with the valve seat or the cone valve is not installed correctly.
1. Eliminate air in oil
2. Clear the orifice
3. Grinding valve hole and slide valve
4. Replacement spring
5. Replace the steel ball or disassemble the cone valve to adjust the fault phenomenon: the secondary pressure rise is not high. Fault analysis:
1. External leakage
2. Poor contact method between cone valve and valve seat:
1. Replace seals, tighten screws, and ensure torque uniformity
2. Repair or replacement failure phenomenon: failure to reduce pressure action failure analysis:
1. The drain port is blocked; the drain pipe is connected to the return pipe and has a return pressure
2. Card removal method when the main spool is in the fully open position:
1. The drain pipe must be separated from the return pipe and returned to the tank separately
2. Repair and replace parts. Check the oil quality.
(From Hebei Zhenxing Gas Pressure Regulator Co., Ltd. ** http://)
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