Valve-Ex Flo 1-1/4Mptx1-1/4Fpt 33 Gpm Br

Excess flow check valves are intended to close upon excessive discharge of vapor or liquid resulting from a break in the hose or piping system. They are used to protect cylinder, tank, and piping systems, and the valves are available in a large variety of sizes and body configurations. When flow exceeds the valve's setting, the valve remains closed until the system equalizes. A built-in equalizing passage automatically opens the valve once pressure on both sides of the poppet are equal. Valves larger than 1/2" threaded NPT have a drill size number 60. Valves with 1/2" threaded NPT and smaller have a limited bypass to comply with NFPA 58. NOTE: A break or leak downstream of an excess flow valve, that does not allow a flow equal to the valve flow rating, will not actuate the valve and could cause a hazardous condition. For this reason, system operators should be familiar with the shutoff valves in the system so that necessary precautions can be taken in an emergency. Care must be taken to be sure the valve's closing rate is less than the capacity of the LP gas or NH3 system in which the valve is installed. Brass valves are not suitable for NH3 applications.