Self cleaning valve assembly

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;
• and
• a piston end having a wiper member received in a receiving groove in continuous frictional contact with the cylinder wall;
• and
• a 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.

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;
• and
• a piston end having a wiper member received in a receiving groove in continuous frictional contact with the cylinder wall;
• and
• a 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.