Method of repairing leaky HVAC service valves and an improved HVAC service valve which prevents leaks

In a HVAC service valve comprised of a cap;

• a valve body;
• the valve body defining a cylindrical cavity for receiving a valve stem;
• the valve stem being rotatably positioned in the cylindrical cavity of the valve body so as to open and close the service valve when the valve stem is rotated counterclockwise and clockwise respectively;
• the valve stem having a top portion;
• the top portion being provided with an O-ring to seal any fluid passageway between the top portion of the valve stem and an inner wall of the cylindrical cavity of the valve body;
• the valve body further having an upper portion;
• the upper portion being provided with means for preventing the valve stem from being forced out of the valve body due to refrigerant pressure;
• the improvement being an elastic seal ring positioned above the top portion of the valve stem and below the means for preventing the valve stem from being forced cut of the valve body, the elastic seal ring being sized to fit tightly against the inner wall of the cylindrical cavity, the elastic seal ring having an inner diameter;
• and wherein the improvement further comprises a rigid retainer ring positioned inside the elastic seal ring, the rigid retainer ring sized to fit tightly in the inner diameter of the elastic seal ring.

In a HVAC service valve comprised of a cap;

• a valve body;
• the valve body defining a cylindrical cavity for receiving a valve stem;
• the valve stem being rotatably positioned in the cylindrical cavity of the valve body so as to open and close the service valve when the valve stem is rotated counterclockwise and clockwise respectively;
• the valve stem having a top portion;
• the top portion being provided with an O-ring to seal any fluid passageway between the top portion of the valve stem and an inner wall of the cylindrical cavity of the valve body;
• the valve body further having an upper portion;
• the upper portion being provided with means for preventing the valve stem from being forced out of the valve body due to refrigerant pressure;
• the improvement comprises an elastic seal ring positioned above the top portion of the valve stem and below the means for preventing the valve stem from being forced out of the valve body, the elastic seal ring being sized to fit tightly against the inner wall of the cylindrical cavity;
• and a rigid retainer ring positioned on top of the elastic seal ring, the rigid retainer ring sized to fit snugly in the cylindrical cavity of the valve body.