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Working Principle of Pneumatic Actuators

S Bharadwaj Reddy
Pneumatic actuators use instrument air pressure to apply force on the diaphragm to move the valve actuator and then to position valve stem. The following photograph shows a cut-away control...

Spring and Diaphragm Pneumatic Actuators

S Bharadwaj Reddy
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...

How to Select an Actuator for Valve

S Bharadwaj Reddy
As the process industry continues to achieve more efficient and productive plant design, plant engineers and technicians are faced, almost daily, with new equipment designs and applications. One product, a...

Basics of Actuators

S Bharadwaj Reddy
A valve actuator is a device that produces force to open or close the valve utilizing a power source. This source of power can be manual (hand, gear, chain-wheel, lever,...

Types of Pneumatic Actuators Animation

S Bharadwaj Reddy
A pneumatic control valve actuator converts energy (typically in the form of compressed air) into mechanical motion. The motion can be rotary or linear, depending on the type of actuator....

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