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US 12,253,100 B2Granted
Eliminating bleed on flow controls
AssigneeDresser, Inc.
InventorHarold Randall Smart
Life of this patent
Estimating the term…
Abstract
An amplifier is configured for use in a control valve. These configurations provide a pneumatic signal to an actuator that regulates flow through the device. The amplifier may include a variable orifice, or bleed valve, that moves in response to changes in actuating media around steady state. This bleed valve prevents bleed of actuating media at steady state. This feature reduces energy consumption or emissions from the control valve.
Claims20
A flow control, comprising:
- an actuator;
- a controller coupled with the actuator to deliver an actuator control signal to the actuator;
- an amplifier disposed in the controller and configured to control the actuator control signal, the amplifier comprising:
- a main valve;
- and
- a bleed valve coupled with the main valve,
- wherein the bleed valve opens before the main valve in response to an increase in an amplifier input signal to the main valve, and
- wherein the main valve comprises a plurality of moveable plugs, one of which vents the actuator control signal in response to a decrease in the amplifier input signal.
5 more elements
A flow control, comprising:
- an actuator;
- a controller coupled with the actuator to deliver an actuator control signal to the actuator;
- an amplifier disposed in the controller and configured to control the actuator control signal, the amplifier comprising:
- a main valve;
- and
- a bleed valve coupled with the main valve,
- wherein the bleed valve opens before the main valve in response to an increase in an amplifier input signal to the main valve, and
- wherein the main valve comprises a plurality of moveable plugs, one of which opens to allow the amplifier input signal to increase the actuator control signal.
5 more elements
Dependencies are inferred from the claim text.