Loader safety valve, relief valve, pressure reducing valve, pilot valve, unloading valve noise cause:
The relief valve is easy to produce high-frequency noise, mainly the pilot valve performance is not stable, that is, the pilot valve prechamber pressure caused by high-frequency vibration air vibration noise. The main reasons are:
(1) The mixture of air and hydraulic oil produces cavitation in the valve, resulting in high-frequency noise. At this time, the air should be emptied in time to prevent the outside air from re-entering.
(2) When the needle valve is frequently opened and worn in the process of use, the conical surface of the needle valve can not be in close contact with the valve seat, resulting in unstable pilot flow and noise caused by pressure fluctuation. Repair or replace the valve in time.
(3) The pilot valve is unstable due to the fatigue deformation of the spring, which causes the pressure fluctuation to cause noise. At this time, the spring should be replaced.
