Scotch yoke pneumatic actuator

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JSW Scotch Yoke Pneumatic Actuator - High Torque Modular Series

Product Overview

JSW scotch yoke pneumatic actuator is a high-performance industrial actuating device designed for 90-degree rotating mechanisms such as ball valves, butterfly valves, and plug valves. It adopts a unique scotch yoke structure, which delivers exceptional torque output—double-acting models can reach over 240,000 N.m, while spring-return models exceed 110,000 N.m, making it ideal for high-load industrial scenarios.
The product features a modular design: the center body offers six sizes, with pneumatic cylinders and spring cartridges attachable to either side, supporting ESD (emergency shut down) applications. A reliable manual override facility (including gear reducer, de-clutch gear box, and hydraulic options) ensures operational flexibility in special situations. Made of high-quality materials such as aluminum alloy, stainless steel, and engineering plastics, it boasts excellent corrosion resistance and wear resistance, withstanding harsh environments like high temperature (-15℃ to +150℃) and low temperature (-40℃ to +80℃). Fully compliant with ISO 5211 and NAMUR standards, the pinion and mounting flange ensure strong compatibility with global industrial equipment.

What is a Pneumatic Actuator?

Pneumatic actuator is an actuating device that uses pneumatic pressure to drive the opening, closing or regulating of valves. Pneumatic actuators can also be divided into two types: single acting and double acting: the switching action of the actuator is driven by a gas source, which is called Double Acting. The switch action of Spring Return (single acting) is only driven by the air source when it is turned on, and the spring returns when it is turned off.

Pneumatic actuators operate within standard industrial pressure ranges, typically 80 to 100 psi. The common applications: valve and damper control, turbine governors and fluid drives, louvers and inlet vane control.

JSW Actuator Core Advantages

Super High Torque Output: Scotch yoke structure provides superior torque performance, double-acting models up to 240,000 N.m, suitable for high-load valve actuation.
Modular Construction: Interchangeable center body, cylinders, and spring cartridges enable quick assembly and delivery, supporting customized ESD solutions.
Multi-Environment Adaptability: Operating temperature ranges from -40℃ to +150℃, with optional stainless steel materials for corrosion-resistant needs.
Reliable Manual Override: Multiple override options (gear reducer, hydraulic) ensure operation under abnormal air supply conditions.
International Standard Compliance: Conforms to ISO 5211 and NAMUR standards, compatible with solenoid valves, positioners, and other accessories.
Low Maintenance Cost: Wear-resistant compound materials avoid metal-to-metal contact, reducing maintenance frequency and extending service life.

Application

Oil & Gas Industry: For pipeline valves and ESD systems, with high torque to handle high-pressure media control.

Chemical Industry: Resists corrosive environments, suitable for reaction vessel and pipeline valve actuation.

Power Generation: Controls turbine governors and boiler dampers, adapting to high-temperature working conditions.

Water Treatment: Drives large-diameter butterfly valves and gate valves, ensuring stable flow regulation.

Marine & Offshore: Optional stainless steel material resists saltwater corrosion, for shipboard and offshore platform valves.

General Industrial ESD: Emergency shut-down applications in petrochemical, pharmaceutical, and other safety-critical industries.

Technical Specifications

Parts and Materials

DIMENSION OF JSW-B/C SERIES DOUBLE ACTING ACTUATOR

OUTPUT TORQUE OF JSW-B SERIES DOUBLE ACTING ACTUATOR

OUTPUT TORQUE OF JSW-C SERIES DOUBLE ACTING ACTUATOR

DIMENSION OF JSW-B(FO/FC) SERIES SPRING RETURN ACTUATOR

DIMENSIONOFJSW-C(FC) SERIES SPRINGRETURN ACTUATOR

DIMENSION OF JSW-C(FO) SERIES SPRING RETURN ACTUATOR

FAQ

Questions	Answers
What is the advantage of scotch yoke structure compared to rack and pinion?	Scotch yoke structure provides higher torque output and more stable force transmission, ideal for high-load and large-diameter valve applications; rack and pinion is more compact for general-load scenarios.
Does JSW scotch yoke actuator support ESD applications?	Yes. It offers spring cartridges for emergency shut-down, with modular design enabling quick integration into ESD systems.
What manual override options are available?	Options include open/enclosed screw gear reducers, de-clutch override gear boxes, and hydraulic override solutions, meeting diverse operational needs.
What standards do these actuators comply with?	They conform to ISO 5211 and NAMUR standards, ensuring compatibility with global valves, positioners, and limit switch boxes.