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This differential pressure switch acts as an air proving switch
Operating with a maximum pressure of 150 PSI and a flow capacity of 73 SCFM
preventing water damage to the furnace plenum and surrounding structure
Proper calibration of the mixing tube sensor ensures the gas valve responds accurately to load changes
featuring an outer circumference of 46 inches and a top width of 1/2 inch (A-section)
McDonnell & Miller 63-M Low Water Cut Off Refrigerant This differential pressure switch actsThe McDonnell & Miller 63 M (Part Number 143100) is a heavy duty, float operated mechanical low water cut off designed for superior reliability in both hot water and steam boiler applications. Built for contractors who require a dependable safety interface, this unit features a manual reset mechanism and a robust No. 2 dual switch assembly. These switches provide simultaneous low water cut off protection and a dedicated circuit for an electric water
