Proportional poppet valve with integral check valves

摘要

A poppet valve assembly includes a body and first and second check valves. The body includes opposing first and second axial end portions. The first end portion has a first circumferential surface, a first end surface, and a tapered surface, which seals with a main valve seat. The second axial end portion defines at least one metering slot. The body defines first and second internal passages. The first internal passage includes an opening in the first end surface, is in fluid communication with one of the metering slots, and has a first check valve seat. The second internal passage includes an opening in the first circumferential surface, is in fluid communication with one of the metering slot, and has a second check valve seat. The first and second check valves are disposed in the respective internal passages and are adapted for sealing engagement with the respective check valve seats.

主权项

1. A poppet valve assembly, comprising:
a body including:
a first axial end portion having a first circumferential surface, a first end surface, and a tapered surface configured for sealing engagement with a main valve seat;a second axial end portion opposite the first axial end portion;a metering slot defined by the second axial end portion;a first internal passage defined by the body, wherein the first internal passage includes an opening in the first end surface, is in fluid communication with the metering slot, and has a first check valve seat; anda second internal passage defined by the body, wherein the second internal passage includes an opening in the first circumferential surface, is in fluid communication with the metering slot, and has a second check valve seat; a first check valve disposed in the first internal passage and adapted for sealing engagement with the first check valve seat; and a second check valve disposed in the second internal passage and adapted for sealing engagement with the second check valve seat; wherein the second axial end portion has a second circumferential surface and a second end surface, wherein the metering slot is in fluid communication with the second circumferential surface, and wherein the second end surface defines a first orifice in fluid communication with the metering slot.