Gravity drain valve

摘要

A drain valve device includes a drain valve housing arranged to be located within a drain opening. The housing has a wall structure surrounding an axis so as to define an internal flow passage through the housing and a strut member depending radially inwardly from the wall structure. The device has one or more valve members. A gas vent passage may be provided in the housing and a vent valve or control member may be provided to selectively prevent flow through the gas vent passage.

主权项

1. A drain valve comprising:
a housing defining a drain conduit for the passage of fluids to be drained, said drain conduit having a first rim defining an inlet into the drain conduit opposite a second rim defining an outlet so as to form an internal flow passage between the inlet and the outlet, the first rim being an uppermost surface of the housing; a raised strut with one end connected to the housing at the first rim; a post coupled to the raised strut, wherein the raised strut depends radially inwardly from the housing towards the post and the raised strut extends above the first rim; a first skirt valve extending radially outwardly from the post and toward the second rim; and a first valve seat extending from an inner surface of said housing wherein a radially distal portion of said first skirt valve sits against said first valve seat.