Pneumatic Operated Metal Butterfly Valve
Pneumatic Operated Metal Butterfly Valve - 1260 Series
Pneumatic Operated Butterfly Valves are high-performance, quarter-turn flow control valves designed for fast, reliable ON–OFF and modulating control in industrial and process systems. Actuated by compressed air, these valves provide quick response, high cycle life, and dependable sealing, making them ideal for applications requiring frequent operation and automation.
The valve combines a precision-engineered butterfly body with a pneumatic rotary actuator, delivering smooth 90° operation, low torque requirements, and long service life. Available in double-acting and spring-return (fail-safe) configurations, pneumatic butterfly valves ensure safe operation even during air supply failure.
Technical Specifications
Parameter
Valve Type
Pneumatic Operated Butterfly Valve
Design
Quarter-Turn Rotary
Size Range
DN50 to DN1200 (1″ to 48″)
Pressure Rating
PN10 / PN16 / PN25 / ANSI Class 150 / 300
Body Materials
Cast Iron, SG Iron, Carbon Steel (WCB), Stainless Steel (SS304 / SS316 / SS316L)
Disc Materials
SS CF8 / CF8M, SG Iron (Nylon Coated), Aluminium Bronze
Shaft Material
SS410 / SS304 / SS316
Seat / Liner
EPDM, Nitrile, Viton, PTFE
Mounting
ISO 5211 Direct Mount
Air Pressure
3.5 – 8.5 kg/cm² (depending on size & service)
Double Acting
4-Way 5-Port under Single coil OR double coil and under IP65 or Flame Proof coil construction
Spring Return
3-Way Single Coil / Double Coil
Design & Construction:
The valve combines a precision-engineered butterfly body with a pneumatic rotary actuator, delivering smooth 90° operation, low torque requirements, and long service life suitable for industrial automation.
Working Principle:
Working Principle
Pneumatic butterfly valves operate through a 90° quarter-turn rotation driven by a pneumatic actuator
Open Position
Disc aligns parallel to the flow, allowing full passage
Closed Position
Disc rotates perpendicular to the flow, providing tight shut-off
Modulating Control
With a positioner, the actuator holds intermediate disc positions for controlled flow regulation
Spring-return actuators automatically move the valve to a predefined safe position during air failure.
Spring-return actuators automatically move the valve to a predefined safe position during air failure.
Automation & Control Options:
- Control Modes: On/Off, Modulating (via Positioner), Inching
- Actuator Types: Double Acting (Stay-Put), Spring Return (Fail-Safe)
- Air Control: Solenoid Valves (3/2, 5/2), FRL Unit (Filter Regulator Lubricator)
- Feedback Systems: Limit Switch Box, Proximity Sensors
- Position Control: Pneumatic / Electro-Pneumatic Positioner (with feedback option)
- Position Control: Pneumatic / Electro-Pneumatic Positioner (with feedback option)
- Control Integration: PLC / DCS / SCADA Compatible
Key Features & Advantages
- Fast pneumatic actuation with quick response time
- Compact and lightweight quarter-turn design
- Tight shut-off with excellent sealing performance
- Low torque and smooth disc rotation
- Suitable for frequent cycling
- Automation-ready construction
- Wide range of materials and seat options
Optional Accessories:
- Air Filter Regulator / FRL Unit
- Limit Switch Box / Proximity Sensor (Open / Close indication)
- Valve Positioner (Pneumatic / Electro-Pneumatic)
- Electro Pneumatic Positioner with & without feedback
- Manual Override Gearbox / Handwheel
- Flow control valve with silencer / Volume Booster / Air lock relay
Industries Served
Water supply & wastewater treatment
Chemical & petrochemical plants
HVAC & utility services
Oil, gas & fuel handling
Typical Applications:
Slurries, powders, and bulk handling systems, cooling water lines, chemical pipelines, and industrial utility services.
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