Patent ID: 6315212
Filing Date: 2001-11-13
Classification: F16K,F24D,Y10T

Abstract:
An automatic venting device for venting gas from a system containing liquid, comprisinga body defining a connector (1) for connecting to the system, a vent (11), a member (29) defining an orifice (27), and a valve seat (5) on the member (29), the body defining a vent path from the connector (1) through the orifice (27) to the vent (11),a float valve (2) movable between a closed position in which it engages the valve seat (5) to close the vent path, and an open position in which it is spaced away from the valve seat (5) to open the path, wherein the float valve sinks towards the open position in the absence of liquid in the system but is floated towards the closed position when liquid in the system reaches a predetermined level, anda subsidiary valve (21, 39) movable between a vent position leaving the vent path open and an operation position in which the vent path is closed,wherein movement of the subsidiary valve (21, 39) to its operation position from its vent position acts to displace the float valve (2) from its closed position.