EXCESS PRESSURE CLAIBRATED GUAGE

摘要

A valve assembly having a housing, and a valve portion disposed in the housing, where the valve is able to change between an open position and a closed position. The valve assembly also includes a variable pneumatic device disposed in the housing, which is able to change between a first configuration and a second configuration, and an inner cavity in fluid communication with the housing. An exhaust aperture is formed as part of the housing, and as pressure builds in the variable pneumatic device, the variable pneumatic device changes from the first configuration to the second configuration such that air is prevented from flowing around the variable pneumatic device, and air flowing through the valve body passes through the exhaust aperture.

主权项

1. An apparatus, comprising:
a valve assembly, including:
a housing;a valve portion disposed in the housing, the valve portion having an open position and a closed position; anda variable pneumatic device located in the housing;wherein air is allowed to pass through the valve portion when the valve portion is in the open position and at last partially flows into the variable pneumatic device to change the variable pneumatic device between a first configuration and a second configuration.