Type P539A pneumatic actuator permits opening and closing Fisher N550/N551 Series Snappy Joe emergency shutoff valves (ESVs) both at the valve with the use of a pneumatic 4-way valve and from a remote location. The actuator opens the valve when pressure is applied. Upon loss of pressure, the N550/N551 Series closes, assisted by the spring in the pneumatic actuator.
Features
- Remotely Operate Emergency Shutoff Valves on Stationary Storage Tanks at Bulk Plants
- Fusible Element Provides Thermal Release
- Return Mechanism: Spring only?no air required
- Emergency Shutoff Valve End Connection Size and Style
- 1-1/4, 2 and 3-inch NPT
- Actuator Pressure Limits
- Minimum: 20 psig / 1,4 bar
Maximum: 40 psig / 2,8 bar
Recommended Operating Pressure: 20 to 25 psig / 1,4 to 1,7 bar
- Temperature Capabilities
- -40° to 150°F / -40° to 66°C
- Approximate Weight
- 4.8 Pounds / 2 kg
- Thermal Release Melt Point
- 212°F / 100°C
