The reason why the pressure reducing valve can not be depressurized or depressurized

The regulator reduces the inlet pressure to a desired outlet pressure and relies on the energy of the medium itself to keep the outlet pressure automatically stable. If the pressure relief two way solenoid valve does not decompress or depressurizes and leads, it may be due to one of the following reasons:
1. Main valve or valve sealing surface with dirt;
2. The main valve or valve sealing surface damage;
3. The main or the china steam solenoid valve spring is tired or broken;
4. The feedback channel 3 hole is blocked;
5. Fatigue or damage to the diaphragm;
6. Piston cylinder wear or corrosion;
7. Piston ring groove and piston ring stuck;
8. Body cavity filled with condensate.