Heavy-Duty Pneumatic Actuator IS & IC Series

The IS & IC series of heavy duty scotch yoke actuators are designed suitable for general purpose of valves and damper automation and offer a wide range of torques enable to operate ball, butterfly, plug valves, dampers or any device that requires a quarter-turn operation for on-off or modulating service.

IS series is the symmetrical design yoke that produces maximum torque at both ends of the 90º cycle providing travel stops.

IC series is the canted design yoke that max produces torque at either close or open end.

Both series actuators come along with a complete line of controls and monitoring accessories including Manual Handwheel (jackscrew), hydraulic overrides, limit switches, solenoid valves, positioners and other controls accessories.

Its modular design and construction provides maximized convenience during installation, maintenance and storage.

Standard IS & IC series actuator are provided with below features.
  • Two years standard warranty.
  • IP66 for water ingress protection and corrosion resistance.
  • Interchangeable modular construction - an advantage for inventory, service, maintenance.
  • Standard operating pressure: 40 to 100 PSIG (2.8 to 7 Bar)
  • Standard operating temperature: -20oC to +80oC with high and low temperature optional trims available.
  • Mounting dimension is to meet with ISO5211
  • Different temperature range : -30oC to 100oC
  • Different pressure range: Max. 10 Bar
  • Manual operation : Hydraulic or Handwheel (jackscrew), Declutchable gear box
  • Different mounting dimension: (MSS-SP101 or others on request)


Guide Bar for Safety Increased

Provided two piston guide (Up & down) bars preventing piston's droop due to abrasion after a long time of use, and engineering Plastic Bush for the pistons with good durability of abrasion and lubricative characteristic enable to keep smooth operation at low pressure as well.

Travel Stop / Adjustment And Indicator

Travel stop/adjustment can be set in the range of -5° ~ +95° of stroke and the stoppers are designed in vertical touch in order to bear big shock.Indicator with pointer & angle meter for easy and convenient use

Piston Guide Ring

High quality Back-up Ring prevent-ing any possible leakage and ensure long lifespan.

Replaceable Bearing

Surface heat-treated Slide Pin, Slide Bearing, and Yoke Slide provides semi-permanent lifespan with strong durability of abrasion.

Spring Rod Guide

Hard anodized Aluminum casting and external epoxy powder coated against severe industrial environment.


In order for direct mounting valve and actuator without separate coupler and bracket, bore diameter for valve shaft is increased, so that it can accept thicker diameter shaft rather than standard. Mounting flange as per ISO5211