Structural features of pneumatic diaphragm valves

A pneumatic diaphragm valve is a special valve that uses compressed gas as the driving force to isolate the fluid from the valve body and actuator through an elastic diaphragm. Its main features are simple structure, safe operation, easy maintenance, and can effectively prevent fluid contamination and leakage, especially suitable for use in piping systems containing particles, viscous, corrosive or high-purity media. As a moving part, the diaphragm not only acts as a shut-off, but also prevents the fluid from coming into contact with the metal parts of the valve, thus protecting the fluid from contamination and the valve itself from erosion.

 

Various diaphragm materials: Commonly used diaphragm materials are rubber, polytetrafluoroethylene (PTFE), neoprene (CR), etc., each of which has its own scope of application.

No dead zone design: The diaphragm covers a wide area, which can almost completely close the flow channel and avoid the accumulation of materials in dead corners.

Quick opening and closing: quick response, suitable for high-frequency opening and closing operations.

Self-cleaning: In some designs, the movement of the diaphragm helps to remove impurities that adhere to the valve body.

The core of the pneumatic diaphragm valve is the elastic diaphragm, which is located in the valve body and moves up and down to control the opening and closing of the valve. When the compressed air is fed into the actuator, the air pressure causes the diaphragm to deform and the flow channel opens; Otherwise, the runner is closed. This process relies entirely on the operation of pneumatic actuators, which enables fluid control.