Pneumatic Actuated Butterfly Valve

African Valve, a Pneumatic Actuated Butterfly Valve Supplier in Egypt, supplies pneumatic actuated butterfly valves for applications that require quick, reliable and remotely controlled valve operation. The combination of a compact butterfly valve and pneumatic actuator makes these valves suitable for automated isolation and flow control across industrial piping systems.

The valves are available in wafer, lug and flanged configurations, with concentric, double-eccentric and triple-offset designs selected according to the service conditions. They are used across oil & gas, petrochemical, chemical, water treatment, power generation, mining and other industrial applications.

Engineering Design & Operation

A butterfly valve controls flow using a disc mounted on a rotating shaft. The disc turns through approximately 90° between the open and closed positions. Concentric, double-eccentric and triple-offset designs provide different sealing and operating characteristics for different pressure and temperature conditions.

The pneumatic actuator uses compressed air to generate the torque required to rotate the valve shaft. Double-acting actuators use air to open and close the valve, while spring-return actuators use air in one direction and spring force in the other. This arrangement can provide a defined fail-open or fail-closed position when required.

Actuator selection considers the valve operating torque, differential pressure, seat friction, temperature and process conditions. Solenoid valves, limit switches, positioners and air filter regulators can be added for automated control and feedback. ISO 5211 may be used for the actuator mounting interface where applicable.

Key Features

• Pneumatic quarter-turn operation
• Fast opening and closing
• Double-acting or spring-return actuators
• PLC, DCS and SCADA integration
• On/off or modulating control where required
• Wafer, lug and flanged configurations
• Concentric, double-eccentric and triple-offset designs
• Position feedback and limit switches
• Manual override options
• Compact construction

Technical Specifications

Materials & Components

• Body: Cast Iron, Ductile Iron, Carbon Steel or Stainless Steel
• Disc: Stainless Steel, Duplex, Ductile Iron or Alloy Steel
• Stem: Stainless Steel or Alloy Steel
• Seat: EPDM, NBR, FKM, PTFE or Metal
• Actuator: Aluminium Alloy, Carbon Steel or Stainless Steel
• Accessories: Solenoid Valve, Limit Switch, Positioner and Air Filter Regulator

Applications

• Oil & Gas
• Refineries
• Petrochemical Plants
• Chemical Processing
• Water Treatment
• Wastewater Treatment
• Power Generation
• Desalination
• Mining
• Industrial Utilities
• Cooling Water Systems
• Firewater Systems

Testing & Standards

Depending on the valve design and project requirements, applicable standards may include API 609, EN 593, ASME B16.34, API 598, ISO 5208 and EN 12266. ISO 5211 may apply to the rotary actuator mounting interface.