Mueller Industries AV3H NK25J Transducer Valve 318172 701 This precision engineered thermal overload switch This precision engineered thermal overload switch monitors the electrical current and winding temperatures within the compressor the Williams P154700 provides a direct physical and electrical match for the factory installed unit The Mueller Industries AV3H NK25J Transducer Valve is a critical component for technicians requiring a direct replacement for B35162 in high pressure refrigeration and air conditioning systems the Mueller AV3H NK25J is engineered for industrial grade performance and is compatible with standard high pressure refrigerants typically found in modern HVACR systems