Skip to content
SHE / VALVES & ACTUATORS

Three-Position Pneumatic Actuator

Pneumatic Actuators

Three-Position Pneumatic Actuator

A three-position pneumatic actuator provides two end positions and a mechanically controlled intermediate position.

Operating energy
Compressed air
Position count
Three discrete positions
Reference travel options
0-45-90 degrees or 0-90-180 degrees
Intermediate setting
Mechanical adjustment within the selected design
Sizing basis
Valve torque at minimum available supply pressure
Control package
Position sequence and feedback to be specified

Send your requirements for the proposed configuration.

01 / OVERVIEW

Product Description

Product construction and operation

A three-position pneumatic actuator provides two end positions and a mechanically controlled intermediate position. Auxiliary pistons and travel adjustment components create the intermediate stop, while a coordinated pneumatic circuit determines which position is selected.

Configuration features

  • Reference travel arrangements include 0-45-90 degrees and 0-90-180 degrees.
  • An intermediate position is mechanically defined rather than inferred from a timed air pulse.
  • Requires a matching solenoid and air-circuit sequence for repeatable positioning.

Selection and installation details

The intermediate stop is useful when a process needs a repeatable partial opening or a defined port-routing position. It is not a substitute for a continuously modulating positioner. Specify the required angle at all three positions, the valve port arrangement and the movement sequence. The response to air loss depends on the actuator and spring arrangement; it must be confirmed for the exact version rather than assumed from the number of positions.

Review supply pressure at the equipment while it is operating, not only the compressor setting. Select accessories and the loss-of-air response for the complete assembly.

Application fit

Three-way valve routing, staged filling and processes requiring a repeatable intermediate valve position.

Information to include in your enquiry

Include the medium, normal and maximum pressure and temperature, connection dimensions, required operating time and quantity. For an existing installation, add identification photographs and the current assembly drawing.

Confirm the final assembly drawing, materials, ratings and control documentation for the proposed configuration before ordering. Product photographs show representative configurations.

Browse Pneumatic Actuators, use the actuator sizing checklist, or send your application requirements.

Need mounting dimensions? Request the drawing for your proposed configuration.

02 / TECHNICAL DATA

Specifications

Product specifications
Operating energyCompressed air
Position countThree discrete positions
Reference travel options0-45-90 degrees or 0-90-180 degrees
Intermediate settingMechanical adjustment within the selected design
Sizing basisValve torque at minimum available supply pressure
Control packagePosition sequence and feedback to be specified

Confirm the final ratings and dimensions against the documentation for your selected model.

03 / RESOURCES

Product Documentation

Request the current datasheet, dimensional drawing and wiring or air-circuit information for the proposed product or assembly. Include your valve type and supply requirements so the documents match the configuration under discussion.

EXPLORE MORE

Related Products

PRODUCT ENQUIRY

Discuss your product configuration.

Include the valve type, operating load, supply and control requirements.

Request a Quote

Your process. Your requirements.
Let’s find the right configuration.

Send your valve details and operating conditions to SHE.

Request a Quote
Request a Quote