Pneumatic Actuator Valves
Pneumatic actuated valves are among the most reliable and widely used equipment for fluid control in industrial facilities. These systems allow for precise regulation of fluid flow within pipelines, ensuring optimal performance, efficiency, and safety. They can be configured with different valve types, such as butterfly valves or ball valves, and can operate in single-acting or double-acting modes depending on the process requirements.
Actuation Types
Pneumatic Actuator valves come with different actuation types to suit operational needs:
- Double-Acting Pneumatic Actuators: Air pressure is used to open and close the valve, providing precise control. These actuators are preferred for applications that require accurate positioning.
- Single-Acting Pneumatic Actuators: Air pressure is applied in only one direction, and a spring provides return movement. These actuators save energy and allow automatic closure in emergency situations.
Supply Air Pressure
Correct supply air pressure is crucial for proper actuator operation. Typically, pneumatic actuators require a pressure of 3–7 bar. Too low pressure may prevent the actuator from fully opening or closing the valve, while too high pressure can reduce the actuator and valve lifespan.
Proportional Control and Positioning
In industrial automation, precise control is critical. Pneumatic actuators can achieve 0°–90° positioning with a 4–20 mA analog signal. If a positioner is installed, the valve position can be continuously monitored via feedback signals, ensuring high accuracy and reliability in process control.
Switches and Limit Switches
Actuators may include integrated mechanical limit switches. Typically, two switches are used in combination with a positioner or limit switch box. Limit switches verify the valve’s open/close position and enhance system safety.
Operating Pressure and Temperature
Valve operating pressures can be selected according to system requirements, commonly PN10 or PN16. Additionally, these valves can safely operate in temperatures ranging from -30°C to 130°C, making them suitable for a wide range of industrial applications.
Material Specifications
Material selection is important for durability and chemical resistance:
- Body Material: GG25 cast iron with epoxy coating
- Disc Material: Epoxy-coated GG25 cast iron or stainless steel
These materials ensure corrosion resistance and compatibility with different types of fluids.
Product Description and Applications
Pneumatic actuator valves are designed to control fluid flow accurately. They are available in various types, including butterfly and ball valves, and can be fitted with optional components such as limit switch boxes, positioners, or Namur solenoid valves. For single-acting operation, a spring is directly coupled to the Kinetrol actuator.
Valve selection is based on customer requirements and the type of fluid in the line. After selecting the appropriate valve, the required torque is calculated, and the corresponding actuator model is chosen. This allows both on/off and proportional control functionality.
Kinetrol offers over 50 years of experience in valve automation, providing SIL-rated, ATEX, NEC, or IEC-compliant assemblies. Modular control units can be easily integrated into Kinetrol actuators for seamless installation and commissioning. Typically, actuated valves consist of a valve and actuator from different manufacturers, mounted together using brackets and couplings. Proper installation is critical for performance and safety.
For professional support and guidance, Mor Endüstri Ltd. – Kinetrol Turkey provides expertise in selecting, supplying, and commissioning pneumatic actuated valves for industrial facilities.
Industrial Applications
Pneumatic actuated valves are used in various industries:
- Petrochemical and chemical plants
- Food and beverage production facilities
- Water and wastewater treatment plants
- Power generation plants
- HVAC systems and process control applications
In these industries, the reliability, durability, and precise control of valves increase production efficiency and reduce operating costs.
Proportional and On/Off Control
Pneumatic actuated valves can operate in both on/off and proportional control modes, depending on process requirements. Proportional control uses a 4–20 mA signal to regulate flow and achieves precise positioning with a positioner. On/off control fully opens or closes the valve and is typically used in simpler applications.
Installation and Commissioning
Installation should be performed by trained technicians. The valve and actuator must be properly matched, and brackets and couplings must be securely mounted. Air supply and electrical connections should be verified, and the functionality of limit switches and positioners should be tested. Mor Endüstri Ltd. – Kinetrol Turkey provides technical support to ensure safe, efficient, and reliable system commissioning.
Advantages
- Precise fluid flow control
- Energy-saving single-acting models
- Wide pressure and temperature ranges
- Durable and corrosion-resistant materials
- Proportional and on/off control options
- Easy installation and commissioning
- Compliance with SIL, ATEX, NEC, and IEC standards
Maintenance and Lifespan
Pneumatic actuated valves can operate for long periods with proper maintenance. Regular checks should include air lines, actuator condition, and cleaning of the valve body and disc. Limit switches and positioners should also be tested periodically to maintain optimal performance and reliability.
Support from Mor Endüstri Ltd. – Kinetrol Turkey
Mor Endüstri Ltd., in collaboration with Kinetrol, offers full support for selecting, supplying, installing, and commissioning pneumatic actuated valves. They provide expert solutions for fluid control needs and ensure safe, efficient, and long-lasting operation of industrial systems.
FAQ (Frequently Asked Questions)
Q1: What is a pneumatic actuated valve?
A: A pneumatic actuated valve is a valve system controlled by air pressure to regulate the flow of fluid in a pipeline. It can be single-acting or double-acting and works with various valve types, including butterfly and ball valves.
Q2: What is the required supply air pressure for the actuator?
A: Recommended supply air pressure for pneumatic actuators is 3–7 bar. This ensures correct and safe operation.
Q3: How is proportional control achieved?
A: Proportional control is achieved using a 4–20 mA analog signal. When a positioner is installed, the valve can be precisely positioned between 0°–90°, and continuous feedback ensures accuracy.
Q4: What is the difference between single-acting and double-acting actuators?
A: Single-acting actuators use air pressure in one direction and a spring for return movement. Double-acting actuators use air pressure to both open and close the valve.
Q5: What materials are used for the valve?
A: The valve body is made of GG25 cast iron with epoxy coating, and the disc is epoxy-coated GG25 cast iron or stainless steel, providing corrosion resistance and compatibility with various fluids.
Q6: What support does Mor Endüstri Ltd. – Kinetrol Turkey provide?
A: They offer guidance for selection, supply, installation, and commissioning of pneumatic actuated valves, including SIL/ATEX/NEC/IEC-compliant systems.
