The Swagelok (Whitey Co.) Model 151-SR Actuator is a durable pneumatic rotary actuator engineered to operate 2-way and 3-way valves in automated process systems. Featuring a spring-return mechanism, this actuator provides a fail-safe position during air supply loss, making it suitable for safety-critical applications.

Rated for a maximum working pressure of 200 PSI, the 151-SR delivers smooth and repeatable quarter-turn (180°) operation. The rugged housing and reliable internal spring assembly provide long service life, even under vibration and high cycle demands.

This actuator is widely used in analyzer panels, pilot plant skids, chemical process loops, and gas distribution manifolds where dependable remote actuation is required.

✅ Technical Specifications

• Manufacturer: Swagelok / Whitey Co.

• Model: 151-SR

• Actuation Type: Pneumatic rotary

• Action: Spring-return (fail-safe)

• Operating Rotation: 180° turn

• Maximum Pressure: 200 PSI

• Fail Position: Dependent on installation (spring-assisted return)

• Mounting: Inline with Swagelok / Whitey ball valves

🧪 Typical Applications

• Process automation valves

• Analyzer switching systems

• Safety exhaust / isolation logic

• Sample stream control

• Fuel gas and utility service panels

• Remote and hazardous locations

💡 Benefits

• Provides fail-safe spring closure/opening

• Reliable torque output under pressure

• Compact size for panel installations

• Suitable for high cycle duty

• Improves operator safety and process reliability