PLATES FOR DUAL PLATE CHECK VALVES

摘要

A metal plate (20) for a dual plate check valve. A central portio n (36) of a D-shaped plate (20) is reinforced such as by means of a raised area (36) on either or both sides of the plate to resist deformation when subjected to reverse pressure in the valve closed p osition, while the ends (35) of the plate are not reinforced. This enables the valve plate to deform in a controlled manner to maintain or i mprove sealing engagement with a valve seat when the valve is subjected to reverse pressure in the valve closed position.