FLUIDYNE Make Excess Flow Check Valve Model: EFCV-100 are water type or sandwitch type and designed to fit inside schedule 40 and 80 pipes. The Teleflo Excess Flow Check Valve are suitable for 300# flange as standard. Models for 150#,600#,900# and 1500# also available on request. The Valves can be mounted in any orientation pressure equalization orifice is provided in all models, and the valve re-open after repairs are made. Imaterials of constructions nclude C.S, SS 304, SS 316, BRONZE and listed for AIR, WATER, METHANE, LPG, CNG, BUTANE, PROPANE, AMMONIA and other fluid.