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Valve Actuator Bench Set

S Bharadwaj Reddy
Valve actuators provide force to move control valve trim. For precise positioning of a control valve, there must be a calibrated relationship between applied force and valve position. Most pneumatic

Pneumatic Actuators

S Bharadwaj Reddy
Pneumatic actuators use air pressure pushing against either a flexible diaphragm or a piston to move a valve mechanism. The following photograph shows a cut-away control valve, with a pneumatic

What is a Pneumatic Actuator ?

S Bharadwaj Reddy
Actuator : By themselves, valves cannot control a process. Manual valves require an operator to position them to control a process variable. Valves that must be operated remotely and automatically

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

What is Instrumentation and Control ?

S Bharadwaj Reddy
Instrumentation is the branch of engineering that deals with measurement and control. According to ISA or known as Instrumentation and Systems Automation Societyformerly known as Instrument Society of America, the

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