Rubber lined pneumatic actuated diaphragm valve

Pneumatic diaphragm valves are a type of valve that uses a flexible diaphragm to control the flow of fluids or gases. The diaphragm is mounted to a valve body, creating a barrier between the actuating components and the process medium. Pneumatic actuators, which use pressurized air or gas to create linear or rotational motion, control the diaphragm’s movement.

Structure and Mechanism

A typical pneumatic actuated diaphragm valve comprises the following components:

• Valve body: Made from materials such as WCB, SS316, or SS316L, the valve body acts as the housing for the diaphragm and other components.
• Diaphragm: A flexible membrane, commonly made from EPDM or EPDM+PTFE materials, separates the actuator from the process medium, eliminating the need for additional sealing elements.
• Pneumatic actuator: Using a double-acting, single-acting normally closed, or single-acting normally open control system, the actuator applies force to the diaphragm, controlling the valve’s opening and closing.
• Ends: The inlet and outlet flange connections that mechanically and pressure seal with pipelines. These are available in standard designations such as ASME B16.34 class 150/300, DIN PN16/20, or JIS 10K/20K.
• Pneumatic accessories: Solenoid valves, limit switch boxes, filters, E/P positioners, and handwheels are used for additional control and functionality.

Applications Across Industries

Pneumatic diaphragm valve are widely used across various sectors, including:

• Chemical processing: These valves are well-suited for handling corrosive and aggressive media due to their rubber-lined body and diaphragm materials, which provide chemical resistance.
• Pharmaceutical and biotech: Their ability to maintain sterility and provide leak-tight seals make them ideal for use in hygienic applications and clean-room environments.
• Water and wastewater: These valves are commonly used for controlling flow in water treatment plants and other related applications.
• Food and beverage: They are suitable for hygienic requirements and are often used for controlling flow in processes such as pasteurization and ingredient dosing.

Size: 1/2″ – 10″ (15mm – 250mm)
Body: WCB, SS316,SS316L
Body+Rubber: Lined PFA or PTFE
Diaphragm Material : EPDM,EPDM+PTFE
Pressure supply: 5.5bar
Pneumatic Actuator: Double acting,Single acting
Ends: Flange
End connections:
ASME B16.34 class 150、ASME B16.34 class 300
DIN PN16、PN20
JIS 10K、20K

Pneumatic Actuator
Control: Double acting,
Single acting normally closed
Single acting normally open
Pneumatic accessories: Solenoid valve, limit switch box , filter, E/P positioner, hand wheel