Abstract: A coupling contains a valve that can be opened or closed to allow refrigerant to pass therethrough. The coupling can be installed onto an air conditioning charging port by sliding a quick disconnect sleeve to a release position along a first end of a valve body. Inside of the valve body is a valve stem that moves between open and closed positions. The valve stem is moved by an actuator sleeve located on a second end of the valve body. The actuator sleeve has a circumferential slot therein. The valve stem cannot be inadvertently opened by fluid pressure because the translational movement of the actuator sleeve and the valve stem is limited by a hose fitting extending through the slot and engaging stop surfaces therein. When the quick disconnect sleeve is in the release position, the actuator sleeve is unable to move the valve stem from the closed position to the open position.

Abstract: A refrigerant recovery and purification system is provided. A one-pass system removes refrigerant, filters and purifies it and condenses and stores the refrigerant in its liquid state for reuse. A collection tank is provided which separates the non-condensible gases, thereby eliminating pressure buildup in the storage tank. The non-condensible gases are vented back to the system to selectively provide positive pressure for vacuum relief. The system also includes an oil separator for refrigerant which has passed through the compressor with a feedback line to return the oil to the compressor.