Structural principle of one-way valve（1）

Compressed air enters from port P, overcomes spring force and friction to open the one-way valve port, and compressed air flows from port P to port A; When there is no compressed air at port P, under the action of spring force and residual air force at port A (chamber), the valve port is in a closed state, making the airflow from A to P unobstructed. A one-way valve should be used in situations where reverse airflow is not allowed, such as when the air compressor is inflating the air tank, a one-way valve should be installed between the air compressor and the air tank. When the air compressor stops working, it can prevent the compressed air in the air tank from flowing back to the air compressor. At the same time, one-way valves can also be used to supply pipelines to auxiliary systems whose pressure may rise above the system pressure.