Contoured check valve disc for low cracking pressure

摘要

A contoured check valve disc features a pivot portion and a check valve portion. The check valve portion is attached to the pivot portion. The check valve portion has a near-sloped portion formed nearest to the pivot portion and a contoured surface curving away from the pivot point to a first point of inflection with a first curvature. The check valve also has a far-sloped portion formed farthest from the pivot portion and a contoured surface curving away from the point of inflection towards a farthest point away from the pivot portion with a second curvature that is less curved or bent than the first curvature. The near-sloped portion and the far-sloped portion combining to form a surface having a contoured pressure/force distribution on the first side to respond to the fluid flow and move the check valve portion away from the fluid opening.