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75K Ohms at 75°F
preventing common localized failures like nuisance lockouts or short-cycling
but orifices must be verified or swapped if converting between natural gas and liquid propane (LP) to match the manifold pressure and BTU requirements
The brass trim and high-temperature packing are rated for fluid temperatures up to 284°F
ensuring seamless integration with existing Lennox air handlers
Siemens Building Technology 257-02056 Valve Assembly R-407C 75K Ohms at 75°FThe Siemens 257 02056 is a professional grade 2 way normally open pneumatic valve assembly engineered for precise proportional control in heating and cooling applications. This 1 2 inch NPT x Union Male unit features a forged brass body and stainless steel trim, ensuring high durability and resistance to scaling in demanding hydronic systems. With a 2. 5 Cv rating and equal percentage flow characteristic, it provides stabilized heat output even under
