Patent ID: 9243718
Filing Date: 2016-01-26
CPC Classification: F16K

Claim Text:
1. A weir-type diaphragm valve, comprising: a valve body configured with fluid flow channels for passing fluid through the weir-type diaphragm valve, configured with a weir having a spherically-shaped weir sealing surface, and also configured with a peripheral rim having a spherically-shaped peripheral sealing surface, the spherically-shaped weir sealing surface and spherically-shaped peripheral sealing surface having polish marks that are substantially perpendicular to the flow of fluid passing through the fluid flow channels of the valve body; and a diaphragm configured with a diaphragm weir sealing surface and a diaphragm peripheral sealing surface, and also configured to respond to an applied force, provide sealing contact between the diaphragm weir sealing surface and the spherically-shaped weir sealing surface so as to stop the flow of fluid passing through the fluid flow channels of the valve body, and provide corresponding sealing contact between the diaphragm peripheral sealing surface and the spherically-shaped peripheral sealing surface so as to prevent leaking of the fluid from the valve body via a shell leak path.