Fluid handling – Back flow prevention by vacuum breaking – Air vent in liquid flow line
Patent
1993-07-27
1995-02-28
Michalsky, Gerald A.
Fluid handling
Back flow prevention by vacuum breaking
Air vent in liquid flow line
137360, 1373842, 13762531, 251288, F16K 302, F16K 2402, F16K 3506
Patent
active
053928059
ABSTRACT:
A frost-resistant hydrant includes a conduit or body tube connected with a fluid source, a valve, an actuator stem connected with the valve, and a flow-through stem defined by a fluid passage through the valve and the actuator stem. The valve preferably includes a ceramic disk stack rotatable between an open position and a closed position. A combination back-flow preventer and vacuum breaker is positioned in the flow-through stem. The actuator stem has a rotation limit enabling the valve to move between fully open and closed positions within 90 degrees. A cartridge body incorporating the valve includes an anti-rotation key engaging the conduit and fixing the rotational position of the valve cartridge relative to the conduit.
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Amerikam, Inc.
Michalsky Gerald A.
LandOfFree
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