Relief valve for gas flow rate regulator
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United States of America Patent
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-
Jun 24, 1997
Issued Date -
N/A
app pub date -
Jun 8, 1995
filing date -
Aug 5, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An improved rotor retainer housing for a rotatable rotor body and a relief sealing mechanism for a gas flow rate regulator. The retainer housing having structural features equivalent to the essential corresponding features of a conventional metal part is formed of molded plastic. A thin metallic layer is provided on the exposed surfaces of the molded plastic part to enhance surface conditions for maintaining an effective seal between the retainer housing and associated parts. The relief sealing mechanism utilizes a separate relief valve and relief valve seal to prevent premature failure of the seal during normal operating pressures. The seal is a metal retaining ring having a polymer O-ring integrally formed within the retaining ring. The O-ring provides sealing surfaces between the relief valve and the gas inlet on the regulator.
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