REFRIGERATION SYSTEM SERVICE VALVES – PIERCING VALVE
• Typically used for penetrating refrigerant lines in equipment with hermetically-sealed compressors that have no service valves. This valve is normally bolted onto the line. A sharp needle in the valve penetrates the tubing when the nut is tightened. The operation is similar to that of a process valve.
• Also used as a temporary service access port installed on a pinch-off tube or suction line. A piercing valve is normally used to remove a refrigerant charge. When the task is finished, the piercing valve should be replaced with a permanent valve.
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