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Morrison Bros 446 Emergency Shut-Off Valve


The 446 normally open valve is designed to shut off liquid flow in the event of a fire or excessive temperatures. This emergency shut-off valve is installed in the fuel line from a storage tank to fuel burning equipment; such as back-up generators, boilers and other flammable liquid burning appliances

Standard Features

  • cULus  listed to ULC/ORD-C842 – Valves for Flammable and Combustible Liquids (See details below in Code Compliance)
  • 165° F fusible link activates spring closure
  • 1/2″, 3/4”, or 1” female NPT threaded connections
  • Compact size reduces operational footprint requirement
  • Easy to install and maintain

Optional Criteria

  • Operating pressure rated at 50 psi
  • Operating temperature range rated at -20° F to 125° F

Construction Details

  • Body: 316 stainless steel
  • Cap, shaft, tail fitting, poppet, and nut: 303 stainless steel
  • Lever arm: 304 stainless steel
  • Handle: 356-T6 aluminum
  • Spring: 17-7 stainless
  • O-ring and disc: FKM

Code Compliance

cULus listed to ULC/ORD-C842

Weight 3.5 lbs
Dimensions 4.5 × 2.5 × 3.5 in

1/2", 3/4", 1"