The Characteristics Of The Check Valve

The check valve is that the fluid can only flow along the inlet, and the outlet medium can not return, commonly known as the check valve. Check valve is also called check valve or check valve. Used to prevent the reverse flow of oil in hydraulic systems, or to prevent the reverse flow of compressed air in pneumatic systems. There are two kinds of one-way valves: straight through and right Angle. The straight-through check valve is installed in the pipe with a threaded connection. The right Angle check valve has three forms of threaded connection, plate connection and flange connection. Let's look at the details below.
First, the characteristics of the check valve
A check valve is a directional control valve in which the air flow can only flow in one direction and not in the opposite direction. Its working principle is the same as the hydraulic check valve. The compressed air enters from P port, overcomes the spring force and friction force to open the check valve port, and the compressed air flows from P to A; When there is no compressed air at P port, under the action of spring force and residual air at A port (cavity); The valve port is closed, so that the air flow from A to P is blocked. The check valve is used in situations where the air flow is not allowed to reverse, such as when the air compressor is charged to the air tank, a check valve is set between the air compressor and the air tank, and when the air compressor stops working, the compressed air in the air tank can be prevented from returning to the air compressor. Check valves are also often combined with throttle valves and sequence valves to form one-way throttle valves and one-way sequence valves.