Pneumatic Actuators and Key Components

Industrial Automation
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Pneumatic Actuators and Key Components

Pneumatic actuators employ compressed air to move devices (often linear or rotational) in automated processes.

The pneumatic actuation system consists of many essential components to assure control, safety, & efficiency.

1). Pneumatic Actuator

2). Solenoid Valve

3). Filter/Regulator (FRL Unit)

4). Limit Switch Box

5). Booster (Air Volume Booster)

6). Flow Regulator

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1). Pneumatic Actuator

Converts compressed air to mechanical action.

May be linear (cylinders) (or) rotary (to turn valves, arms, etc.).

2). Solenoid Valve

An electromagnetically controlled valve.

Controls the air flow to extend (or) retract the actuator.

Depending on the actuator design, 3/2 (or) 5/2 valves are commonly used.

3). Filter/Regulator (FRL Unit)

A filter eliminates pollutants from compressed air.

The regulator maintains air pressure at a safe, ideal level.

Frequently paired with a lubricator (FRL unit) to extend component life.

4). Limit Switch Box

Mounted on rotary or valve actuators.

Gives input on the actuator’s position (open/closed).

Sends signals to the control systems and PLCs.

5). Booster (Air Volume Booster)

Increases the flow (or) pressure of the compressed air to actuator.

Aids in faster actuation in situations where long air lines induce pressure loss.

6). Flow Regulator

Regulates the speed of actuator movement by limiting air flow.

Installed on the exhaust ports (or) lines leading into the actuator.

Helps to prevent slamming or jerky action.

Application

  1. A rotary pneumatic actuator opens and shuts the valve.

  2. A solenoid valve causes movement.

  3. A filter-regulator maintains clean and consistent pressure.

  4. A flow regulator regulates motion speed.

  5. A limit switch box provides open/closed feedback.

  6. A booster ensures quick and forceful action as needed.