Pneumatic Actuated Valves

Pneumatic actuated valves are devices that use pressurised air to automatically open and close a valve, enabling fast and reliable flow control without manual intervention.

Depending on the design, the pressurised air drives either a linear motion, moving a piston back and forth, or a rotary motion, turning the valve element through an arc. This range makes them well-suited to remote or automated systems where speed and precision are essential.

Common configurations include double-acting units and spring-return designs.

At RS Australia, we supply a comprehensive range of pneumatic actuated valves, from pneumatic ball valves to air-operated diaphragm valves, to suit diverse industrial applications.

Key Benefits of Pneumatic Actuated Valves

Pneumatic actuator valves offer a range of operational and safety advantages that make them a preferred choice across many industrial applications.

• Automated Operation: By using a pneumatic valve actuator to open and close valves automatically, these units eliminate the need for manual intervention, reducing operator risk in demanding environments.
• Fast Response: A pneumatic actuator delivers rapid open and close actions upon receiving a signal, ensuring quick and dependable flow control in time-sensitive process systems.
• Hazardous Environment Suitability: Air-operated valves can be controlled from a safe distance, making them ideal for deployment in hazardous or hard-to-reach locations.
• Consistent Flow Control: Actuated ball valves provide precise, repeatable performance in process pipelines, helping to maintain stable operating conditions throughout continuous production.
• Failsafe Configurations: Double-acting designs offer accurate bidirectional control, while spring-return units default to a safe open or closed position in the event of air supply failure.
• Wide Material Compatibility: Available in brass and stainless steel, pneumatic valves and actuators can be matched to the specific demands of various industries, from food processing to chemical handling.

Types of Air-Operated Valves

Air-operated valves vary by motion type and operation, ensuring that the right actuator and valve combination can be matched to the demands of any application.

By Motion Type

The motion type of an air-actuated control valve determines which valve designs it is compatible with and how it performs in a given pipeline system.

• Linear Actuators: These actuators produce straight-line movement, making them suitable for use with gate and globe valves. Diaphragm and piston actuator designs fall into this category, with piston types handling higher operating pressures.
• Rotary Actuators: Producing turning motion, rotary pneumatic actuators are used with ball, butterfly, and plug valves. Rack-and-pinion designs are common for lighter-duty applications, while scotch-yoke actuators are preferred where higher torque output is required.

By Operation

The operating mechanism of a pneumatic valve actuator directly influences how the valve responds under normal conditions and how it behaves in the event of a system failure.

• Double-Acting Pneumatic Actuators: These actuators use air pressure to drive movement in both directions, providing precise and responsive control. They are well-suited to applications where active positioning in both open and closed states is required.
• Spring-Return Pneumatic Actuators: Using air pressure to move in one direction and a spring to return to a default position, these failsafe units automatically revert to either a normally open or normally closed state if the air supply is interrupted.

How to Choose the Right Pneumatic Valve Actuator

Choosing the correct pneumatic valve actuator ensures reliable performance, compatibility with your system, and long-term operational safety. Consider the following factors before making your selection:

• Valve Type: Identify the valve your actuator will control. For instance, ball valves suit on/off applications, butterfly valves handle high-flow systems, and quarter-turn designs work well in compact spaces.
• Actuator Type: Double-acting actuators require air to open and close, offering precise control, whilst spring-return units provide a failsafe default position when air supply is lost.
• Default Position: Determine whether your application requires a normally closed or normally open configuration based on your system's safety requirements and process conditions.
• Pipe Connection: Ensure the thread size and standard of your pneumatic actuator valve matches your pipework, whether that is BSP, Rc, or NPT.
• Pressure Rating: Match the actuator and valve pressure rating to your system's operating pressure, measured in bar or psi, to prevent premature failure or leakage.
• Body Material: Brass suits general-purpose applications, whilst stainless steel 316 is recommended for corrosive media, hygienic environments, and food grade processing requirements.

Common Industry Applications

Pneumatic actuated valves are widely used across industries where automated, reliable flow control is essential to operational safety and efficiency.

• Water and Wastewater Treatment: Air-operated valves automate flow isolation and control across treatment plants, ensuring consistent and precise management of water distribution and waste processing systems.
• Oil and Gas: In hazardous areas where manual operation is unsafe, pneumatic actuators enable remote valve actuation, keeping operators at a safe distance from high-risk environments.
• Food and Beverage: Stainless steel pneumatic ball valves meet strict hygienic standards, making them ideal for controlling the flow of consumable liquids and ingredients throughout processing lines.
• Chemical Processing: Corrosion-resistant valves with pneumatic actuators handle aggressive media safely, whilst spring-return failsafe configurations ensure valves default to a safe position during unexpected system interruptions.
• HVAC: Pneumatic actuator valves provide automated control of heating and cooling fluid circuits, helping to maintain consistent temperatures and improve overall energy efficiency across commercial buildings.
• Manufacturing and Process Automation: Ball valves with pneumatic actuators integrate seamlessly with flow switches, PLCs and SCADA systems, enabling centralised, programmable control of fluid flow across complex production environments.

Shop Pneumatic Actuated Valves at RS Australia

RS Australia is a trusted supplier and distributor of plumbing and pipeline components, including a wide selection of pneumatic actuator valves. Our items are sourced from leading brands, including Festo, EMERSON - ASCO, SMC, and Siemens, chosen for their reliability and performance across demanding industrial environments.

Alongside our pneumatic actuated ball valves, we also carry other components, such as solenoid valve coils and check valves, for all fluid control and pipeline management needs.

Explore the full range on our user-friendly online store and have your items delivered directly to your door. With our swift and flexible delivery options, we ensure your items arrive when your project needs them.

For more details on delivery times and fees, please visit our delivery information page.