Patent ID: 8991427
Filing Date: 2015-03-31
Classification: F16K,Y10T

Abstract:
1. A high pressure fluid control device, comprising: a valve body defining a first port, a second port, and a third port; a throat disposed within the valve body and in fluid communication with each of the first, second, and third ports; first and second valve seats mounted in the throat of the valve body; a control element disposed within the throat of the valve body and having a first tapered seating surface and a second tapered seating surface, the control element movable between a first position in which the first tapered seating surface is seated against the first valve seat and a second position in which the second tapered seating surface is seated against the second valve seat; the first and second ports in fluid communication with one another via the throat along a second flow path when the control element is in the second position; and the first and third ports in fluid communication with one another via the throat along a first flow path when the control element is in the first position, and wherein the control element includes a first tapered portion formed opposite the first tapered seating surface and a second tapered portion formed opposite the second tapered seating surface, wherein an exposed area of the first tapered seating surface equals an exposed area of the first tapered portion when the control element is in the first position, and wherein an exposed area of the second tapered seating surface equals an exposed area of the second tapered portion when the control element is in the second position, allowing the control element to be balanced.