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This specific pneumatic reversing relay is factory-calibrated to a 9 PSI crossover point
Cast iron provides better momentum and lower wear rates under the high-friction conditions found in HVAC belt drive systems
or 15 psig saturated steam applications
allowing for precise calibration to meet specific system requirements
Lennox 80K80 Pressure Switch 326010-701 This specific pneumatic reversing relayThe Lennox 80K80 pressure switch is a critical safety component designed for specific Lennox furnace models to ensure proper inducer motor performance and venting integrity. This SPST furnace pressure switch features a . 65" WC set point, calibrated to monitor the negative pressure generated by the combustion blower. Engineered with a 1 4" barb connection, it provides a secure fit for standard vacuum tubing, preventing air leaks that can lead to