Pressure equalizing valve

Details Pressure equalizing valve Pressure equalizing valve

B - Operations, Transporting

60

C

137/88

B60C 23/04 (2006.01) B60C 23/00 (2006.01) F16K 37/00 (2006.01)

Patent

CA 1105355

Abstract A pressure equalizing valve is disclosed which has a housing defining a chamber. The housing has first and second passages therethrough opening into the chamber. A valve seat in the chamber surrounds the opening of the second passage thereinto. A diaphragm has its periphery sealed to the housing and forms a wall of the chamber adjacent to the valve seat. A spring on the side of the diaphragm opposite the valve seat urges the diaphragm against the seat with a predetermined force, to seal the second passage from the chamber, and hence from the first passage. An indicator is mounted on the housing and has a pressure responsive portion in communication with the chamber for indicating when the air pressure therein is below a predetermined value just sufficient to overcome the predetermined force and unseal the second passage.

333098

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