System for controlling the delivery of a fuel gas to a burner apparatus
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United States of America Patent
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N/A
Issued Date -
Dec 28, 2006
app pub date -
Sep 8, 2003
filing date -
Sep 8, 2003
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A system for controlling the delivery of a fuel gas to a burner apparatus includes a gas-delivery duct extending between an inlet opening and an outlet opening, a pressure-regulator device including a servo-valve in the duct, having a closure member with diaphragm control, the diaphragm being subjected, on one side, to the pressure regulated by the pressure-regulator device and, on the other side, to a calibration pressure established in a calibration chamber of the regulator device, as well as a calibration spring provided in the calibration chamber and acting on the diaphragm. The system also includes a delivery-pressure modulator unit including a modulation valve with a valve seat disposed in the duct downstream of the pressure-regulator device and cooperating with a respective closure member operatively connected to an actuator device arranged for the modulation control of the delivery pressure, as well as a flow communication device between the calibration chamber of the pressure-regulator device and the modulator unit, for bringing into the calibration chamber a pressure signal that is correlated proportionally with the gas-delivery pressure so that the pressure regulated by the pressure-regulator device is in turn correlated with the pressure signal.
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