Siemens Building Technology 257-02056 Valve Assembly R-407C preventing common localized failures like

preventing common localized failures like nuisance lockouts or short-cycling

you can achieve either clockwise or counter-clockwise rotation

Motor Protection: Brushless DC technology includes electronic stall detection to prevent hardware failure at end-of-stroke

but orifices must be verified or swapped if converting between natural gas and liquid propane (LP) to match the manifold pressure and BTU requirements

75K Ohms at 75°F

Siemens Building Technology 257-02056 Valve Assembly R-407C preventing common localized failures likeThe 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