| CPC F16K 1/385 (2013.01) [F16K 1/46 (2013.01); F16K 15/063 (2013.01); F16K 27/0254 (2013.01)] | 13 Claims |
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1. A fluid metering valve, comprising:
a valve body having an inlet opening and an outlet opening; and
a valve assembly arranged at least partially within the valve body between the inlet opening and outlet opening to adjust the flow-rate of a fluid provided to the outlet opening, the valve body further includes a valve opening receiving at least a portion of the valve assembly, a bonnet selectively attached to the valve body within the valve opening, the valve assembly having
a seal ring enclosed within the valve body and defining an opening in communication with the inlet opening and the outlet opening, the seal ring having an internal tapered sealing surface; and
a valve stem; and
a piston with conical profile with a tapering annular sidewall moveably mounted to the valve stem, a lantern arranged within the housing, the lantern defining a generally hollow body configured to guide the movement of the piston therethrough, the body defined by at least one sidewall having at least one flow stabilizing opening formed therethrough in selective communication with the inlet opening, a compression spring arranged between the bonnet and the lantern for maintaining the position of the lantern within the valve body in an axial direction of the stem, the valve stem and piston moveable into and out of sealing contact with the internal tapered sealing surface of the seal ring for selectively receiving and engaging with a corresponding exterior tapered sealing surface of the piston for selectively permitting fluid flow between the inlet opening and the outlet opening through the opening in the seal ring.
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