Valve unit for modulating the delivery pressure of a gas
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United States of America Patent
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N/A
Issued Date -
Apr 21, 2005
app pub date -
Jul 27, 2004
filing date -
Jan 29, 2002
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A valve unit for modulating the delivery pressure of a gas. The valve unit delivers a gas flow and has a servo-valve with a first closure element and a tapping duct. The valve unit further has a pressure regulator associated with the servo-valve and including a valve seat mounted in the tapping duct and a respective second closure element associated with the seat, as well as an actuator associated with the second closure element, and a control circuit for generating a control signal for the actuator. The movement of the second closure element relative to the corresponding valve seat is correlated proportionally with the actuator-control signal so that, for a pre-selected signal value, a corresponding control-pressure value is generated so as to modulate the delivery pressure in a proportionally correlated manner.
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