One way valve, also known as check valve or check valve. Used to prevent reverse flow of oil in hydraulic systems, or to prevent reverse flow of compressed air in pneumatic systems.

There are two types of one-way valves: straight through and right angle. The straight through one-way valve is installed on the pipeline with threaded connections. There are three forms of right angle one-way valves: threaded connection, plate connection, and flange connection. Hydraulic control one-way valve, also known as blocking valve or pressure maintaining valve, is the same as one-way valve, used to prevent reverse flow of oil. But when reverse oil flow is required in the hydraulic circuit, the control oil pressure can be used to open the one-way valve, allowing oil flow in both directions. The hydraulic control one-way valve adopts a conical valve core, so it has good sealing performance. When a closed oil circuit is required, this valve can be used as a one-way locking mechanism to maintain pressure in the oil circuit. There are two types of oil leakage control methods for hydraulic check valves: internal leakage and external leakage. Internal leakage type can be used in oil circuits where there is no back pressure at the reverse outlet of the oil flow; Otherwise, an external leakage type is required to reduce the control oil pressure.