Refrigeration Service Valve Positions

Many service valves will have this.

Refrigeration service valve positions. Service valve front seated position the valve stem is turned fully clockwise to effectively stop the flow of refrigerant vapour from the suction line union on the low pressure side of the compressor and to the discharge line union on the high pressure side of the compressor. When opening a service valve make sure it is secured by placing it in a vise or attaching it to the compressor. Service valves can be set to three different positions figure 3. Full size ports for unrestricted flow non directional.

6 57 a hose is connected to the low side access point compressor suction valve through a filter drier to the transfer unit compressor suction valve. Valves with access fittings also available. Also look to see if the service valve has a packing gland nut. Service valves should al.

It is typically made of brass and is found at the base of the valve stem. Three way service valve positions. The packing gland nut helps to ensure a leak free seal. Front seated position the valve stem is turned fully clockwise to effectively stop the flow of refrigerant vapour from the suction line union on the low pressure side of the compressor and to the discharge line union on the high pressure side of the compressor.

Seal cap design provides valve operation without removal of seal cap. A hose is then connected from the transfer unit compressor discharge valve to an external storage cylinder. Many residential techs get confused when they see these multi position valves in larger equipment and andrew does a great job of demonstrating the basics in this video. Full refrigeration service temperature range of 40 f to 325 f.

The valve is back seated when the stem is turned all the way out counterclockwise. Include access fitting located on tube extension. Valve may be installed in any position. This position is called back seated because the valve is seated on the back port of the valve.

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