Patent ID: 6109289
Filing Date: 2000-08-29
Classification: B01D,B60T,F16T,Y10T

Abstract:
A drain valve comprising a housing defining a chamber, a flow inlet and a flow outlet opening into the chamber, a flow path defined in the chamber and providing fluid communication between the flow inlet and the flow outlet, a closure member arranged to move in use within the housing between a first position wherein the flow path is occluded and a second position wherein the flow path is unobstructed, the drain valve further comprising a signal port, and movement of the closure member being effected in use by the presence or absence of a signal pressure at said signal port, and a sump adapted to collect liquid in the drain valve, wherein the sump is in fluid communication with said signal port and comprises discharge means adapted to discharge liquid collected in the sump to the exterior of the valve, the discharge means being activated in use by a predetermined variation in pressure at the signal port.