Pneumatic Actuator

Parameter range

Adaptive passage: DN8 - DN200

Source pressure: 2.5 - 8 bar

Single-acting and double-acting performer

Application selection

Solenoid valve: double action selects two five-way, single action selects two three-way.

Source Triplex: source pressure stabilization, filtration, cylinder lubrication.

Restricted switch: remote feedback switch signal.

Locator: Enter analog signal, 4 - 20MA or 0 - 10V, adjust valve opening.

Note: The above are not standard accessories, if you need to customize the order to specify, the solenoid valve and limit switch are separated explosion-proof and non-explosion-proof, if explosion-proof is required, specify the level of explosion protection

Pneumatic Actuator - Rack and Pinion Quarter-Turn

Double-acting and spring-return pneumatic actuators for ball and butterfly valves. Anodized aluminium body, ISO 5211 mounting, 90° stroke with Namur solenoid interface.

Model reference: Pneumatic Actuator · size range 10-4000 Nm · connection ISO 5211 / Namur.

Key features

• Every unit air-tested and torque-verified before shipment
• ATEX and SIL-capable versions on request
• Double-acting and spring-return (fail-safe) versions
• Anodized aluminium body with hard-anodized inner bore
• ISO 5211 bottom flange and Namur top interface
• Adjustable travel stops ±5° on both ends
• Operating pressure 2-8 bar, -20 °C to +80 °C standard

Typical applications

• Ball and butterfly valve automation
• Tank-farm manifolds and skids
• Water and wastewater plants
• Food-processing lines with fail-safe requirement
• Remote or hazardous-area installations

Materials and standards

Torque 10-4000 Nm; body: extruded aluminium, anodized; pistons: die-cast aluminium; seals: NBR; ports: G1/4" Namur; rotation 90° ±5°; options: limit switch box, solenoid valve, positioner, handwheel override, ATEX version. All wetted parts are traceable to EN 10204 3.1 mill certificates, and each valve is pressure-tested before packing.

Frequently asked questions

How do I size the actuator?
Take the valve breakaway torque from the datasheet, add 20-30% safety margin, then confirm air supply pressure. Spring-return units need extra margin to close against the spring.

What does fail-safe mean here?
A spring-return actuator closes (or opens) the valve automatically when air pressure is lost, which is essential for safety-critical isolation.

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