Intermittent pilot ignition gas valve having protection against negative pressure for internal diaphragms
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United States of America Patent
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-
Nov 7, 2023
Grant Date -
Jan 21, 2021
app pub date -
Jul 17, 2020
filing date -
Jul 19, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
Provided are embodiments of a gas valve for an intermittent pilot ignition system. The gas valve includes features designed to address the buildup of negative pressure in a fuel line connected to the gas valve that could cause internal valve diaphragms to open, drawing fuel from the gas valve. In embodiments, the gas valve includes a system of check valves designed to seal off the gas valve when a negative pressure develops. In other embodiments, the gas valve includes a relief valve having a relief port so that air is able to enter the valve proximate to the inlet port so as to avoid building a negative pressure sufficient to open the diaphragms. In both cases, the valve remains primed with fuel for subsequent ignition. The gas valve is envisioned to be useful for a variety of pilot operated systems.
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