Overview

The Single Acting Pneumatic Actuator is one of the safest actuation solutions for industrial automation systems. It uses compressed air to drive the actuator in one direction, while an internal spring return automatically returns it to its default position.

This design provides a Fail Safe function, ensuring automatic valve opening or closing in the event of air supply or power loss, making it the ideal choice for applications requiring the highest levels of safety and reliability.

UNOX Single Acting Pneumatic Actuators are manufactured to the highest quality standards for operating 90° quarter-turn valves, including butterfly valves, ball valves, and dampers, delivering reliable performance and long service life across a wide range of industrial applications.

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Features

* Pneumatic operation in one direction with automatic spring return.
* Fail Safe function for automatic opening or closing upon loss of air supply or power.
* Lower compressed air consumption compared to double acting actuators.
* Fast response and reliable performance.
* Lightweight, high-strength aluminum housing.
* Excellent corrosion resistance for harsh industrial environments.
* Long service life with minimal maintenance requirements.
* Easy installation and compatibility with industrial automation systems.

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Applications

Single Acting Pneumatic Actuators are widely used in industrial applications requiring safe operation, including:

* Chemical processing
* Petrochemical plants
* Water and wastewater treatment plants
* Power generation facilities
* Gas distribution systems
* Steam systems
* Fire protection systems
* HVAC systems
* Food and pharmaceutical industries
* Automated production lines and industrial processes

They are the ideal solution for applications requiring automatic valve opening or closing during emergencies or in the event of power or air supply failure.

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Operating Principle

Pneumatic Operation

The actuator is powered by compressed air, which rotates the output shaft to open or close the valve.

Spring Return

When the air supply is lost, the internal spring automatically returns the actuator to its predetermined fail-safe position (open or closed), ensuring system safety and continuous protection.

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Design Features

* Lightweight extruded aluminum body with excellent corrosion resistance.
* Low-friction internal surfaces for smooth operation and extended service life.
* High-strength aluminum alloy pistons.
* High-performance steel springs for reliable operation.
* Corrosion-resistant coated output shaft for harsh operating conditions.
* NBR (Nitrile Rubber) seals provide reliable sealing and leak prevention.
* Compatible with standard accessories, including:
* Solenoid Valve
* Limit Switch Box
* Positioner
* NAMUR standard accessories
* Fully compliant with ISO 5211, DIN 3337, and VDI/VDE 3845 (NAMUR) standards for easy mounting to a wide range of valves.

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Why Choose UNOX Pneumatic Actuators?

UNOX Single Acting Pneumatic Actuators provide maximum safety and reliability through their Spring Return design, which automatically returns the actuator to its fail-safe position when air supply or power is lost. Combined with high-quality manufacturing, long service life, and low air consumption, they are the ideal choice for a wide range of industrial automation applications.

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Compatible Products

The Single Acting Pneumatic Actuator is compatible with a wide range of quarter-turn valves, including:

* Butterfly Valves
* Ball Valves
* Dampers