External Equalization: Compels accurate refrigerant metering by compensating for pressure drops across the evaporator coil

Engineered for high-stability monitoring

When your mechanical schedule calls for precise modulation in high-demand hydronic or steam systems

contaminant-free air in compressed air systems

the pilot operated mechanism handles pressure ranges from 5 to 150 PSI for air/water and up to 100 PSI for light oil systems

Nordyne 632566 Pressure Switch 328140-751 External Equalization: Compels accurate refrigerantThe Nordyne 632566 Pressure Switch is a critical safety component designed for specific gas fired furnaces and packaged units. As the direct replacement for 632566R, this differential pressure switch monitors the pressure drop across the heat exchanger, ensuring the induced draft motor is evacuating flue gases effectively before allowing the ignition sequence to proceed. This single pole, normally open switch is calibrated to precise OEM