Patent ID: 8851195
Filing Date: 2014-10-07
Classification: A62C,F16K,Y10T

Abstract:
1. A differential dry pipe valve, comprising: a body including an inlet chamber having an inlet port, an exit chamber having an exit port, and a gasket flange attached to the body between the inlet chamber and the exit chamber, the gasket flange having a sealing surface and surrounding a through-opening on the body, the inlet and exit ports being substantially coaxial; a gasket attached to the gasket flange, the gasket having an inner water lip in fluid communication with the inlet chamber and an outer air lip surrounding the water lip, wherein the spacing between the water lip and air lip varies, wherein the gasket has a shape generally matching the gasket flange; and a clapper hingedly attached to the body and pivotally movable between a closed position, in which the clapper is sealed against the water lip and the air lip, and an open position, in which the clapper is not sealed against the water lip and the air lip, the clapper being attached to the body such that the clapper is movable from the closed to the open position based on a differential in pressure between the inlet chamber and the exit chamber.