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the 99M77 gasket is included to ensure the airtight seal required for the pressure switch to function correctly
this normally open zone valve is designed to facilitate unrestricted flow when de-energized
Does this harness require additional weatherproofing
The maximum differential pressure for modulation is 30 psi
While the 325 series is durable
Mepco (Dunham Bush) S-472 Seal 323055-751 the 99M77 gasket is includedThe Mepco (Dunham Bush) S 472 Seal is a heavy duty mechanical shaft seal engineered for 5 8 inch pump shafts, specifically designed for 56J motor frames in commercial and industrial HVACR systems. As a critical component in centrifugal pumps, this Type 21 mechanical seal utilizes a high grade carbon ceramic seating interface to prevent fluid leakage between the pump housing and the rotating shaft. The technical construction features Buna elastomers