Emerson Fisher Snappy Joe Type N551 Emergency Shutoff Valve

Type N551 Snappy Joe Emergency Shutoff Valves are intended for in-line use on LP-Gas or Anhydrous Ammonia (NH3) service. The valves may be installed on both ends of transfer hoses where the hose connects the bulk plant piping to the bobtail, transport, or tank car. They provide a quick way of automatically shutting off gas flow in the event of a hose rupture. A fusible element in the latch melts if the temperature reaches 212°F / 100°C, allowing the valve to self-close.

This product is backed by a 10 year warranty.

Features

• High Flow Capacity: The main poppet moves completely out of the flow stream for extremely low restriction to flow
• Operational Ease: Moving the operating lever to the vertical position opens the valve, making it simple to tell if the unit is open or closed
• Fusible Element: The fusible element is located at the hub of the operating lever and stub shaft - when exposed to fire, the element melts allowing valve to self close
• Rugged Construction: Heavy duty construction makes the Snappy Joe suitable for use transfer area, even under frequent use
• Ease of Service: Serviceable without removal from the pipeline - parts that wear are external and can be changed in a matter of minutes
• UL Listed: All seats and seals use UL approved materials rated for -40°F and have metal back up seals for extended fire resistance

Specifications

• Type: N551
• Style: Emergency Shutoff Valve
• Size: 2 and 3 in. FNPT
• Material: Ductile Iron
• Propane Flow at 2 psid (0.14 bar):
• 2 in: 295 GPM (1117 LPM)
• 3 in: 850 GPM (3127 LPM)
• Maximum Operating Inlet Pressure: 400 PSI (27.6 bar)
• Temperature Range: -20° to 160°F (-29° to 71°C)
• Warranty: 10 Years

Downloads

N551 - N851 Snappy Joe Shutoff Valve Manual (PDF Download)

N551 - N851 Snappy Joe Packing Replacement Manual (PDF Download)