A self cleaning valve assembly includes a valve body having an internal valve cavity. A cylinder member received in the valve cavity has a first sealing surface and a cylinder wall, and divides the valve cavity into a liquid-free cavity portion and a flow cavity portion. A spindle includes a spindle
A self cleaning valve assembly includes a valve body having an internal valve cavity. A cylinder member received in the valve cavity has a first sealing surface and a cylinder wall, and divides the valve cavity into a liquid-free cavity portion and a flow cavity portion. A spindle includes a spindle body contacting the first sealing surface to continuously prevent pressurized fluid in the flow cavity portion from entering the liquid-free cavity portion. A spindle piston end has a wiper member in a receiving groove frictionally contacting the cylinder wall. A handle pinned to the valve assembly directly contacts the piston end. Handle rotation displaces the spindle from a valve closed to a valve open position permitting pressurized fluid flow into the flow cavity portion. The wiper member wipes a contaminant off the cylinder wall and further prevents contaminant entrance into the liquid-free cavity portion.
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1. A self cleaning valve assembly, comprising: a valve body having an internal valve cavity;a cylinder member received in the valve cavity having a first sealing surface and a cylinder wall, and dividing the valve cavity into a liquid-free cavity portion and a flow cavity portion;a spindle, includin
1. A self cleaning valve assembly, comprising: a valve body having an internal valve cavity;a cylinder member received in the valve cavity having a first sealing surface and a cylinder wall, and dividing the valve cavity into a liquid-free cavity portion and a flow cavity portion;a spindle, including: a spindle body in sealing contact with the first sealing surface to continuously prevent a pressurized fluid in the flow cavity portion from entering the liquid-free cavity portion; anda piston end having a wiper member received in a receiving groove in continuous frictional contact with the cylinder wall, wherein axial displacement of the spindle causes the wiper member to wipe a contaminant off the cylinder wall, the wiper member further preventing entrance of the contaminant into the liquid-free cavity portion. 2. The self-cleaning valve assembly of claim 1, wherein the spindle includes a first O-ring seal received in a first O-ring groove and a second O-ring seal received in a second O-ring groove. 3. The self-cleaning valve assembly of claim 2, wherein the second O-ring seal is in continuous sealing contact with the first sealing surface in each of a valve closed and a valve open position to prevent the pressurized fluid in the flow cavity portion from entering the liquid-free cavity portion. 4. The self-cleaning valve assembly of claim 2, further comprising a bushing having a second sealing surface, the bushing received in a pressurized fluid cavity of the valve body, the first O-ring seal being in sealing contact with the second sealing surface in a valve closed position, preventing flow of the pressurized fluid from the pressurized fluid cavity into the flow cavity portion. 5. The self-cleaning valve assembly of claim 4, wherein in a valve open position the first O-ring seal is displaced freely past the second sealing surface permitting flow of the pressurized fluid past the first O-ring seal and into the flow cavity portion. 6. The self-cleaning valve assembly of claim 1, further comprising a biasing member positioned in continuous contact with both the cylinder member and the piston end of the spindle acting to continuously bias the spindle toward the valve closed position. 7. The self-cleaning valve assembly of claim 6, wherein the biasing member is positioned in the liquid-free cavity portion. 8. The self-cleaning valve assembly of claim 1, further comprising a handle rotatably pinned to the valve assembly and directly contacting the piston end such that rotation of the handle displaces the spindle axially from a valve closed to a valve open position permitting flow of the pressurized fluid into the flow cavity portion. 9. The self-cleaning valve assembly of claim 8, wherein the handle includes an extending portion, the extending portion acting to axially displace the spindle when the handle is rotated toward the valve open position. 10. A self cleaning valve assembly, comprising: a valve body having an internal valve cavity;a cylinder member received in the valve cavity having a first sealing surface and a cylinder wall, and dividing the valve cavity into a liquid-free cavity portion and a flow cavity portion;a spindle, including: a spindle body in sealing contact with the first sealing surface to continuously prevent a pressurized fluid in the flow cavity portion from entering the liquid-free cavity portion; anda piston end having a wiper member received in a receiving groove in continuous frictional contact with the cylinder wall; anda handle rotatably connected by a pin to the valve assembly and directly contacting the piston end such that rotation of the handle displaces the spindle from a valve closed to a valve open position permitting flow of the pressurized fluid into the flow cavity portion, wherein displacement of the spindle causing the wiper member to wipe a contaminant off the cylinder wall, the wiper member further preventing entrance of the contaminant into the liquid-free cavity portion. 11. The self-cleaning valve assembly of claim 10, wherein the spindle body includes a first cylindrical portion having a first O-ring, the first O-ring in sealing and sliding contact with an inwardly raised second sealing surface preventing the pressurized fluid in a pressurized fluid cavity from entering the flow cavity portion in the valve closed condition. 12. The self-cleaning valve assembly of claim 11, wherein rotation of the handle causes axial displacement of the spindle moving the first O-ring past the inwardly raised sealing surface against a biasing force of a biasing member to permit flow of the pressurized fluid to flow through a flow aperture created through an extending end of the cylinder member. 13. The self-cleaning valve assembly of claim 11, wherein the spindle body includes a second cylindrical portion larger than the first cylinder portion, the second cylindrical portion having a second O-ring, the second O-ring in sealing and sliding contact with the first sealing surface. 14. The self-cleaning valve assembly of claim 10, wherein the handle includes an extending portion extending outwardly away from the pin, the extending portion directly contacting the piston end when the handle is rotated to achieve the valve open position, and is not in contact with the piston end in the valve closed position. 15. A self cleaning valve assembly, comprising: a valve body having an internal valve cavity;a U-shaped cylinder member received in the valve cavity having a sealing surface and a cylinder wall, and dividing the valve cavity into a liquid-free cavity portion and a flow cavity portion;a spindle, including: a spindle body having a first O-ring seal received in a first O-ring groove and a second O-ring seal received in a second O-ring groove, the second O-ring seal in continuous sealing contact with the sealing surface in each of a valve closed and a valve open position to prevent a pressurized fluid in the flow cavity portion from entering the liquid-free cavity portion; anda piston end having a wiper member received in a receiving groove in continuous frictional contact with the cylinder wall; anda handle rotatably pinned to the valve assembly having an extending portion directly contacting the piston end such that rotation of the handle causes the extending portion to displace the spindle from the valve closed to the valve open position permitting flow of the pressurized fluid past the first O-ring seal into the flow cavity portion, wherein displacement of the spindle causing the wiper member to wipe a contaminant off the cylinder wall, the wiper member further preventing entrance of the contaminant into the liquid-free cavity portion. 16. The self-cleaning valve assembly of claim 15, wherein the piston end includes a diameter larger than the diameter of the spindle body. 17. The self-cleaning valve assembly of claim 16, wherein the spindle body includes: a first cylindrical portion having the first O-ring groove created therein;a second cylindrical portion having the second O-ring groove created therein; anda third cylindrical portion positioned between the first and second cylindrical portions, the third cylindrical portion having a diameter smaller than a diameter of the first and second cylindrical portions. 18. The self-cleaning valve assembly of claim 15, further comprising a biasing member positioned in continuous contact with both the U-shaped cylinder member and the piston end of the spindle acting to continuously bias the spindle toward the valve closed position. 19. The self-cleaning valve assembly of claim 18, wherein the biasing member is positioned in the liquid-free cavity portion. 20. The self-cleaning valve assembly of claim 15, further comprising a bushing having a second sealing surface, the bushing received in a pressurized fluid cavity of the valve body, the first O-ring seal being in sealing contact with a sealing surface in the valve closed position preventing flow of the pressurized fluid from the pressurized fluid cavity into the flow cavity portion, wherein displacement of the spindle to the valve open position displaces the first O-ring seal freely away from the sealing surface to permit flow of the pressurized fluid from the pressurized fluid cavity into the flow cavity portion.
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