The role of one-way valve in hydraulic cylinder

First, the first function of the check valve is to keep the pressure in the system stable. For hydraulic cylinders, if a spool valve is used, there may be a problem of gap leakage. In this case, it can only temporarily maintain pressure. And if there is a requirement for pressure maintenance, then a hydraulic control check valve needs to be added in the oil circuit, so that the oil circuit can be maintained for a long time by virtue of the tightness of the poppet valve closure.

Second, the one-way valve can be regarded as the "support" of the hydraulic cylinder. Especially in vertical oil cylinders, if other types of valves are used, there may be leakage problems, which may cause the piston and piston rod to slide down. The third function is to realize the locking of the oil cylinder. Because it can tightly seal the oil in the two chambers of the oil cylinder, in this case, the piston will not move due to the influence of external force.

Third, the check valve can help achieve quick oil drain. We know that when the hydraulic cylinder is working, the effective working areas of the two chambers are very different. Therefore, in order to prevent the backward movement of the piston from being restricted, then we can set a hydraulic control check valve, so that the oil in the right chamber can be discharged smoothly.

Fourth, the one-way valve can also be used instead of the oil filling valve. For example, in a vertical hydraulic cylinder, when the piston descends at high speed, due to the action of high-pressure oil and self-weight, its descending speed will be very fast, and it is prone to air suction and negative pressure, so a supplementary oil should be added device.