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or 416 models) for future maintenance
Standard 1-inch or 4-inch slots will not accommodate the proprietary rail system
which is vital for maintaining indoor comfort and system longevity
preventing the common amperage spikes associated with generic alternatives
the power assembly includes the stainless steel diaphragm
Siemens Building Technology 658-0012 Valve 321702-401 or 416 models) for futureThe Siemens Building Technology 658 0012 is a heavy duty 1" N O pneumatic radiator valve engineered for proportional control in two pipe steam or hot water heating systems. As part of the professional grade Siemens Powertop 658 Series, this angle union valve features a 10 Cv flow coefficient and a field tested 2 6 psi spring range. Designed for the rigors of commercial mechanical rooms, the unit includes a stainless steel stem for enhanced durability