Designed for use on portable systems with vapor or liquid including torches, heaters, lead melting burners, tar and asphalt burners, wallpaper steamers and other applications involving portable DOT cylinders. The POL inlet attaches directly to the cylinder valve and the outlet mounts to the regulator.
Unit of Measure



  • Integral ball check design.
  • Machined groove designed to break-off and allow excess flow valve ball to close.


Body Material

N/A Brass

Nut Material

N/A Brass

Bell Material

N/A Stainless Steel

Spring Material

N/A Stainless Steel

Retainer Spring Material

N/A Stainless Steel

Retainer Material

N/A Brass


A. Inlet Connection

N/A Male POL

B. Outlet Connection NPT

N/A 1/4 in

C. Wrench Hex Flats

N/A 7/8 in

D. Effective Length (Approx.)

N/A 1-1/16 in

Approximate Closing Liquid Flows

N/A 0.95 gpm/propane

Approximate Closing Vapor Flows at 25 psig Inlet

N/A 265 SCFH/Propane

Approximate Closing Vapor Flows at 100 psig Inlet

N/A 500 SCFH/Propane

Product Type

N/A Excess Flow Valves


N/A RegO


N/A No protection is afforded should break-off occur downstream of the groove. Also, restrictions introduced by the regulator may prevent closing of the valve due to limited flow capacity. The valve’s purpose is to protect the cylinder valve outlet should the regulator be broken off of its connection (at the groove), in which case it will close. It must not be depended upon to protect against breaks downstream of the regulator.

Multiply flow rate by 0.94 to determine liquid butane flow.