A valve assembly is provided and includes a poppet disposed to regulate a pressure of a fluid flowing through a pathway defined between the poppet and a valve body, a drive element configured to modulate a pressure of a servo fluid to thereby control a position of the poppet relative to the valve bo
A valve assembly is provided and includes a poppet disposed to regulate a pressure of a fluid flowing through a pathway defined between the poppet and a valve body, a drive element configured to modulate a pressure of a servo fluid to thereby control a position of the poppet relative to the valve body and an actuator body coupled to the poppet and configured to deliver a supply fluid to the drive element from a first cavity defined between the poppet and the actuator body and to deliver the servo fluid from the drive element to a second cavity defined between the actuator body and the poppet. The poppet defines a filter through which fluid flows from the pathway into the first cavity as the supply fluid.
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1. A valve assembly, comprising: a poppet disposed to regulate a pressure of a fluid flowing through a pathway defined between the poppet and a valve body;a drive element configured to modulate a pressure of a servo fluid to thereby control a position of the poppet relative to the valve body; andan
1. A valve assembly, comprising: a poppet disposed to regulate a pressure of a fluid flowing through a pathway defined between the poppet and a valve body;a drive element configured to modulate a pressure of a servo fluid to thereby control a position of the poppet relative to the valve body; andan actuator body coupled to the poppet and configured to deliver a supply fluid to the drive element from a first cavity defined between the poppet and the actuator body and to deliver the servo fluid from the drive element to a second cavity defined between the actuator body and the poppet,the poppet including a conical portion to abut a valve seat and prevent fluid flow through the pathway with the poppet occupying a closed position, the conical portion defining a filter through which fluid flows from the pathway into the first cavity as the supply fluid with the poppet occupying open and intermediate positions at which the poppet is displaced from the valve seat but not with the poppet occupying the closed position. 2. The valve assembly according to claim 1, wherein the drive element is disposed at an exterior of the valve body. 3. The valve assembly according to claim 1, wherein the fluid comprises air and the filter is oriented transversely relative to the pathway. 4. The valve assembly according to claim 1, wherein the valve body includes an inlet, an outlet and a central portion disposed between the inlet and the outlet, the central portion including the valve seat, which has an increasing diameter with increasing distance from the inlet. 5. The valve assembly according to claim 4, wherein the drive element is configured to drive poppet movement such that the poppet occupies at least one of: the open position at which the poppet is displaced from the valve seat and thereby permits fluid flow through the pathway;the closed position at which the poppet abuts the valve seat and thereby prevents fluid flow through the pathway; andthe intermediate position at which the poppet is displaced from the valve seat by a lesser degree than the open position. 6. The valve assembly according to claim 5, wherein the poppet comprises: the conical portion formed to define the filter;a tubular portion coupled to the conical portion;a first flange radially extending from the tubular portion; anda second flange radially extending from the tubular portion downstream from the first flange. 7. The valve assembly according to claim 6, wherein the body comprises a third flange, the first cavity being substantially defined between the conical portion, the tubular portion and the third flange, andthe second cavity being substantially defined between the third flange, the first flange and the tubular portion. 8. The valve assembly according to claim 6, wherein a third cavity is axially defined between the first and second flanges and is fluidly communicative with the outlet. 9. The valve assembly according to claim 1, wherein an operation of the drive element is responsive to fluid pressures in the valve body. 10. The valve assembly according to claim 1, wherein the drive element comprises a torque motor. 11. A valve assembly for a valve body, the valve assembly comprising: a poppet disposed to regulate a pressure of a fluid flowing in a first direction through a pathway defined between the valve body and the poppet;a drive element configured to modulate a pressure of a servo fluid to thereby control a position of the poppet relative to the valve body; andan actuator body coupled to the poppet and configured to deliver a supply fluid to the drive element from a first cavity defined between the poppet and the actuator body and to deliver the servo fluid from the drive element to a second cavity defined between the actuator body and the poppet,the poppet including a conical portion having a tapered surface configured to abut a valve seat of the valve body with the poppet occupying a closed position and thereby preventing fluid flow through the pathway, the tapered surface defining filtering through-holes by which fluid flows in a second direction, which is traverse to the first direction, from the pathway into the first cavity as the supply fluid with the poppet occupying open and intermediate positions at which the poppet is displaced from the valve seat but not with the poppet occupying the closed position. 12. The valve assembly according to claim 11, wherein the drive element is disposed at an exterior of the valve body. 13. The valve assembly according to claim 11, wherein the fluid comprises air and the through-holes are oriented to filter the air flowing into the first cavity. 14. The valve assembly according to claim 11, wherein the valve body includes an inlet, an outlet and a central portion disposed between the inlet and the outlet, the central portion including the valve seat, which has an increasing diameter with increasing distance from the inlet. 15. The valve assembly according to claim 14, wherein the drive element is configured to drive poppet movement such that the poppet occupies at least one of: the open position at which the poppet is displaced from the valve seat and thereby permits fluid flow through the pathway;the closed position at which the poppet abuts the valve seat and thereby prevents fluid flow through the pathway; andthe intermediate position at which the poppet is displaced from the valve seat by a lesser degree than the open position. 16. The valve assembly according to claim 14, wherein the poppet comprises: the conical portion formed to define the through-holes;a tubular portion coupled to the conical portion;a first flange radially extending from the tubular portion; anda second flange radially extending from the tubular portion downstream from the first flange. 17. The valve assembly according to claim 16, wherein the body comprises a third flange, the first cavity being substantially defined between the conical portion, the tubular portion and the third flange, andthe second cavity being substantially defined between the third flange, the first flange and the tubular portion. 18. The valve assembly according to claim 16, wherein a third cavity is axially defined between the first and second flanges and is fluidly communicative with the outlet. 19. The valve assembly according to claim 11, wherein an operation of the drive element is responsive to fluid pressures in the valve body. 20. The valve assembly according to claim 11, wherein the drive element comprises a torque motor.
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