Pilot valve for pneumatic control systems with improved poppet
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United States of America Patent
Stats
-
Oct 27, 1992
Grant Date -
N/A
app pub date -
Dec 13, 1991
filing date -
Dec 13, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An improved mechanically actuated pilot valve is shown in which the output pressure from the valve is dependent upon a flapper position rather than upon force is applied to the flapper. The pilot valve has a valve body with a gas inlet chamber, a gas outlet chamber and an inner connecting gas passage for controlling the flow of gas through the valve. An improved poppet having primary and secondary sealing regions cooperates with a valve seat provided in the gas passage and with a hollow actuating stem which protrudes from the valve body to control the flow of control gas through the valve when the actuating stem is contacted by an external actuator, such as a flapper element.
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