Page 318 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

Types of pneumatic actuators
Pneumatic linear actuator

When a pneumatic actuator provides linear motion in response to controlled air pressure applied to it, it is called
a pneumatic linear actuator. Mostly such actuators are used for fluid flow applications in globe valves and also to
precisely regulate gate valves. The diagram of linear actuator with globe valve application is shown below-
Pneumatic linear actuator

Pneumatic rotary actuator
When pneumatic actuators provide rotary motion in response to controlled air pressure applied to it, it is called
pneumatic rotary actuator. Typically the rotary actuator can turn 90 degrees (quarter turn) during full scale move-
ment. These are used to operate ball valve, butterfly valve. A diagram for pneumatic actuator with ball valve and
butterfly valve application is shown below-

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CITS : E & H - Electronics Mechanic - Lesson 188 - 198