Mueller Industries AP18422 Pressure Relief Valve 700 PSI 3/4" NPTFE X 3/4" NPTFI

The Mueller Industries AP18422 Pressure Relief Valve is a safety control component that protects refrigeration and HVAC systems by releasing excess refrigerant pressure when internal conditions exceed a preset limit. It operates through a calibrated spring-loaded sealing mechanism that responds to rising system pressure opening to discharge refrigerant and closing once normal conditions are restored, maintaining controlled operation in HVAC systems. The valve features a 3/4" NPTFE inlet and 3/4" NPTFI outlet connection design allowing inline installation within refrigeration piping. Its 700 PSI pressure rating enables it to handle high-pressure refrigerant conditions ensuring controlled pressure regulation, stable system operation and consistent protection of connected components.