Suitable for excavator loader accessories hydraulic proportional valve RE177539

You may not know much about safety valves, but when it comes to overload (overflow) valves, oil port overflow valves or secondary guns, you may have an impression. Some common problems of excavators are caused by the failure of safety valves, such as slow speed, weakness, pipe burst or hydraulic pipe burst, cylinder lever bending and so on. Without much to say, the following digging brother will give you a detailed introduction to the solution of the safety valve and its failure, I believe you will be full of harvest.
The relief valve is mounted on the main control valve (distributor) on the side of the operating stem. In appearance, the relief valve is cylindrical and very similar to the main relief valve. The difference is the adjustment thread on the top. The safety valve has one thread and the main relief valve has two threads. At the pressure setpoint, the pressure setpoint of the safety valve is higher than the pressure setpoint of the main relief valve.
Under normal circumstances, the safety valve does not participate in the work, so the pressure measurement of the safety valve is special and can not be measured directly with the instrument. The pressure of the main relief valve needs to be increased in advance and can be measured only after it is higher than the pressure value of the safety valve.