Armstrong Fluid Technology 816303-317K Impeller Kit 318973-401 Airtight Performance: Prevents HVAC air

Airtight Performance: Prevents HVAC air leaks and maintains critical system pressure for peak efficiency

Multi-Refrigerant Compatibility: Rated for use with A1 and A2L refrigerants

This OEM 220-240F auto limit switch functions as a normally closed thermostat disc that monitors heat exchanger temperatures to prevent thermal runaway

Larger globe valves often encounter high differential pressures that exceed the torque rating of a single actuator

Armstrong Fluid Technology 816303-317K Impeller Kit 318973-401 Airtight Performance: Prevents HVAC airThe Armstrong Fluid Technology 816303 317K Impeller Kit is a precision engineered OEM replacement part designed to restore the hydraulic efficiency of high performance circulator pumps. This comprehensive kit features a 5. 25 inch Noryl impeller, a high strength thermoplastic known for its exceptional dimensional stability and resistance to corrosion and scaling in demanding HVACR systems. By utilizing an injection molded replacement impeller kit,