What are the common faults when the pressure reducing valve of the hydraulic press is used

In the process of using the hydraulic press, the pressure reducing valve of the hydraulic press often encounters some failures when used in the system. So what are some of these failures? How to fix it? Next, Xiaobian will introduce the common faults and solutions when using the pressure reducing valve of the hydraulic press.

First, the damping hole on the pilot valve of the hydraulic press is blocked. After the hole is blocked, the pilot valve does not control, and the outlet pressure oil fills the upper chamber of the main valve through the damping hole in the main valve, the main valve spool is in the lower position under the action of the spring, the valve port has been wide open, so the valve does not have the decompression effect, the import and export pressure rises or falls simultaneously.

Second, the oil press drain port is blocked. After the port is blocked, the pilot valve can not drain oil, and the consequences of not working are the same as the damping hole on the pilot valve, so the oil pressure of the import and export is also rising or falling simultaneously.

Third, the main valve spool of the hydraulic machine is stuck in the fully open state.

In the one-way pressure reducing valve of the oil press, due to the serious leakage of the check valve, the pressure of the oil inlet is passed to the oil outlet, so the pressure of the oil inlet and the oil outlet also changes synchronously.