Metering valve
First Claim
1. An axial flow metering valve comprising a valve body having an inlet, an outlet and a valve chamber between said inlet and outlet, said valve body including first and second body parts, said first body part having a passage for fluid between said inlet and said valve chamber and at least two axially extending guide slots spaced radially from said fluid passage, a valve seat in said valve chamber, said valve seat being formed in said second body part, a valve member in said valve chamber movable toward and away from said valve seat, said valve member having a body portion with at least two guide pins extending axially from said body portion through said guide slots, the number of said guide pins corresponding to the number of said guide slots, each guide pin having a continuing segment of an encompassing thread, and an actuating member surrounding and threadedly engaging said guide pins, whereby said actuating member while being axially restrained is rotatable to move said valve member toward and away from said valve seat.
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Accused Products
Abstract
An axial flow metering valve includes a valve body having an inlet, an outlet, a valve chamber therebetween and a passage for fluid between the inlet and the valve chamber. A valve member is movable in the valve chamber and includes a number of guide pins which extend axially through guide slots and into grooves in the valve body. The guide pins are threadedly engaged with a rotatable actuating member which encircles them. Rotation of the actuating member moves the valve member toward and away from the valve seat to regulate fluid flow. The valve member may carry a check valve member which checks reverse flow or may carry an inner bypass valve member which permits full unregulated reverse flow.
373 Citations
23 Claims
- 1. An axial flow metering valve comprising a valve body having an inlet, an outlet and a valve chamber between said inlet and outlet, said valve body including first and second body parts, said first body part having a passage for fluid between said inlet and said valve chamber and at least two axially extending guide slots spaced radially from said fluid passage, a valve seat in said valve chamber, said valve seat being formed in said second body part, a valve member in said valve chamber movable toward and away from said valve seat, said valve member having a body portion with at least two guide pins extending axially from said body portion through said guide slots, the number of said guide pins corresponding to the number of said guide slots, each guide pin having a continuing segment of an encompassing thread, and an actuating member surrounding and threadedly engaging said guide pins, whereby said actuating member while being axially restrained is rotatable to move said valve member toward and away from said valve seat.
- 18. An axial flow metering valve comprising a valve body having an inlet, an outlet, a valve chamber between said inlet and outlet, a passage for fluid between said inlet and said valve chamber, and a valve seat in said valve chamber, at least two axially extending guide slots in said valve body spaced radially from said fluid passage, a valve member in said valve chamber movable toward and away from said valve seat, said valve member having a body portion of substantially the same diameter as said valve chamber, a plurality of fluid passages extending through said valve member body portion and oriented to direct fluid into said valve chamber upstream of said valve seat, said valve member body portion having at least two guide pins extending axially from said body portion through said guide slots, the number of said guide pins corresponding to the number of said guide slots, each guide pin having a continuing segment of an encompassing thread, and an actuating member surrounding and threadedly engaging said guide pins, whereby said actuating member while being axially restrained is rotatable to move said valve member toward and away from said valve seat.
Specification