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As a direct compressor start component
it maintains system calibration and prevents the efficiency loss associated with drifting or faulty readings
It serves as the primary transition point for combustion byproduct gases
extending the life of the reversing valve
Resideo VCZNB7400 Valve 319847-401 As a direct compressor startThe Resideo VCZNB7400 is an industrial grade 1 2" NPT three way hydronic valve engineered for precision control in closed loop HVAC systems. Featuring a 2. 7 Cv flow coefficient and a 60 psi close off pressure rating, this balanced cartridge cage valve provides stable regulation for both chilled and hot water applications, including those with glycol concentrations up to 60%. The bronze body construction and stainless steel stem ensure long term