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Is it true or false the electronic controllers cannot modulate a pneumatic actuator?

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Question added by Basharat Ali , Mechanical supervisor , FCC
Date Posted: 2015/09/05
Shilpa Joshi
by Shilpa Joshi , Instrumentation and Control Engineer , Thermax

False. 

 

Let us take example of a Control Valve with Pneumatic actuator. The electronic controller O/P is 4-20mA & it is given to E/P converter & positioner which actuates the valve. 

Sherif Mohammed Ibrahim
by Sherif Mohammed Ibrahim , Senior Mechanical Technical engineer , Al-Latifia Trading & Contracting Company

wikipedia

(Greek:which means "breath") is a branch of physics applied to technology that makes use of gas or pressurized air.

Pneumatic systems used extensively in industry are commonly powered by compressed air or compressed inert gases. A centrally located and electrically powered compressor powers cylinders, air motors, and other pneumatic devices. A pneumatic system controlled through manual or automatic solenoid valves is selected when it provides a lower cost, more flexible, or safer alternative to electric motors and actuators.

so answer is false