Combination excess-flow/back-flow valve

Details Combination excess-flow/back-flow valve Combination excess-flow/back-flow valve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 17/30 (2006.01) F16K 15/02 (2006.01)

Patent

CA 2534468

A combination valve includes a valve body having a valve body passageway with an inlet and an outlet opposite the inlet. An excess-flow seat is positioned within the valve body passageway approximate the outlet. A back-flow seat is positioned within the valve body passageway approximate the inlet. The valve includes a slug positioned within the valve body passageway, between the excess-flow and back-flow seats. A spring is positioned within the valve body passageway to bias the slug away from the excess-flow seat toward the back-flow seat. The excess-flow seat includes a bypass passageway that allows a predetermined amount of flow, when the slug is seated in the excess- flow seat. The slug prevents back-flow when the slug is seated in the back-flow seat.

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