Metering valve
AssigneeGas Research Institute
InventorsSteven R. King, James J. Cole, Kennon H. Guglielmo, John P. Latusek
Life of this patent
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Abstract
A method and a metering valve for metering a fluid by incrementally adjusting a position of a flow control element that directly varies a flow area of a flow port opening in a valve housing. The flow control element is adjustably mounted with respect to the valve housing. The metering valve maintains an approximately constant percentage variation of a mass flow rate of a fluid with respect to the current total flow rate flowing through the flow port opening, for each incremental adjustment of the flow control element position, throughout the metering range of the metering valve yielding an exponentially varying mass flow rate as a result of linearly varying the flow control element position.
Claims17
A metering valve comprising:
- a valve housing, said valve housing forming a flow port;
- a flow control element adjustably mounted to move with respect to said valve housing;
- adjustment means for incrementally adjusting a position of said flow control element and varying a flow area of said flow port;
- and
- flow control means for maintaining at each fixed incremental position of said flow control element an approximately constant percentage of set point variation in mass flow rate of a fluid flowing through said flow port throughout a metering range of said metering valve, said constant percentage of set point variation being a difference between an incremented mass flow rate at an incremented position of said flow control element and a set mass flow rate at a set point previous to said incremented position, divided by said set mass flow rate.
A metering valve comprising:
- a valve housing, said valve housing forming a flow port;
- a flow control element adjustably mounted to move with respect to said valve housing;
- adjustment means for incrementally adjusting a position of said flow control element and varying a flow area of said flow port;
- and
- flow control means for maintaining an exponentially varying mass flow rate of fluid flowing through the metering valve while linearly varying a position of said flow control element.
A method for metering a fluid comprising the steps of:
- incrementally adjusting a position of a flow control element of a metering valve and varying an area of a flow port;
- and
- maintaining at each fixed incremental position of said flow control element an approximately constant percentage of set point variation in mass flow rate of a fluid flowing through said flow port throughout a metering range of said metering valve, said constant percentage of set point variation being a difference between an incremented mass flow rate at an incremented position of said flow control element and a set mass flow rate at a set point previous to said incremented position, divided by said set mass flow rate.
A method for metering a fluid comprising the steps of:
- incrementally adjusting a position of a flow control element of a metering valve and varying an area of a flow port;
- and
- maintaining an exponentially varying mass flow rate of fluid flowing through the metering valve while linearly varying said position of said flow control element.
Dependencies are inferred from the claim text.