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Broad Compatibility: Replaces specific Nordyne 622115 and 621675 models
Utilizing a 1/2 inch shaft diameter and CCW rotation
this unit must not be installed in fire-rated assemblies or exterior walls
it is recommended to mount it vertically and upright to prevent sediment buildup in the solenoid base
it ensures stable proportional control for hot water
Siemens Building Technology 656-0004 Valve 319852-301 Broad Compatibility: Replaces specific NordyneThe Siemens Building Technology 656 0004 Valve is a specialized 1 2 inch normally open pneumatic valve designed for terminal unit applications including convectors, fan coils, and radiation systems. This 2 way globe valve features a 0. 9 Cv flow coefficient, engineered to maintain precise control of water or steam in variable pressure environments. Built with a brass body and stainless steel stem, the assembly excels in high rise building systems due