Flow lines should be as short and as free from bends and other flow restrictions as possible. Lines and fittings should not be reduced to smaller size than the size of the line for which the valve is intended as indicated by the last size code letter in the valve number. Whenever a spring setting or spring design is changed, this abrogates Underwriters' Laboratories approval. Valve stem, valve head, spring, and cotter pin are made of stainless steel. Guide, nut, and body are made of carbon steel.
Body is cadmium plated.
Valves made entirely of stainless steel, monel, or other materials can be furnished. Size designation is by code following the basic item number and separated from it by a colon. See Price Sheet for list of sizes. Flow is toward the female thread. MGM Excess Check Flow Valves, but have been designed to provide an extra female pipe thread in the inlet end.