Home » Spring and Diaphragm Pneumatic Actuators
Animation Control Valves

Spring and Diaphragm Pneumatic Actuators

Spring and diaphragm pneumatic actuators can be “direct-acting”, meaning that air to the diaphragm casing pushes the actuator stem downward. This “air-to-close” action compresses the spring, which in turn pushes the actuator stem back up when the supply pressure is decreased or lost.

Additionally, spring and diaphragm pneumatic actuators can be “reverse-acting”, meaning that air to the diaphragm casing causes the actuator stem to move upward. This “air-to-open” action compresses the spring, which in turn causes the actuator stem to move downward when supply pressure is decreased. This is the most common type of diaphragm actuator used, as the spring action results in a valve “fail-closed” position upon loss of supply air.

Valve Diaphragm Actuator

Related Articles

Direct & Reverse Acting Control Valves

S Bharadwaj Reddy

What is Rupture Disk

S Bharadwaj Reddy

Choked Flow of Control Valves

S Bharadwaj Reddy

Area Velocity Flow Meter Principle

S Bharadwaj Reddy

Proximity Switch Working Animation

S Bharadwaj Reddy

Disassembly of a sliding-stem Control Valve

S Bharadwaj Reddy

Leave a Comment

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Accept Read More