What are the reasons for the poor or non-pressure holding performance of the 315-ton hydraulic press?

保压具体来说就是当315吨液压机作业时，由液压油泵供油到油缸，利用单向阀来进行保压，调节阀来控制油压。当超过设定的数值后，并门进行卸油，同时，来保持设定的压力。保压的主要作用就是低于设定的压力，通过油液在自行调节油泵油量来保持压力的稳定，调压阀是用来限制高压力，以免压力太高损坏设备。
If in the use of 315 tons of hydraulic press, the pressure holding performance is poor, or not, the specific reasons are as follows:

1, the solenoid valve internal serious wear, resulting in one-way performance deterioration, resulting in pressure holding performance is not good.
2, the filling valve is also a one-way valve, if the internal wear, or even deformation, the pressure holding performance will deteriorate.
3. The sealing ring in the hydraulic oil cylinder is seriously worn and aged, which is also one of the reasons for the deterioration of the pressure holding performance.
4. The hydraulic joint of the oil pipeline has oil leakage, which will also cause the pressure holding performance to deteriorate.