Siemens Building Technology 257-02033 Valve Assembly 320734-701 it replaces older part numbers

it replaces older part numbers like RLY30062 and is specifically compatible with Lochinvar Knight KB81-286 and WB81-211 units

Rugged Construction: Die-cast aluminum housing and NEMA 3 protection ensure longevity in industrial HVACR applications

also designated as the Model GSK-3

By modulating the flow of hot gas to the receiver and restricting liquid flow from the condenser

Its construction utilizes premium materials

Siemens Building Technology 257-02033 Valve Assembly 320734-701 it replaces older part numbersThe Siemens 257 02033 is a 2 way normally open pneumatic valve assembly engineered for precise proportional control in heating and cooling applications. Built with a 1 2 inch NPT x Union Male connection, this unit features a 0. 63 Cv rating and utilizes equal percentage flow characteristics to ensure linear heat transfer across varying load conditions. The forged brass body is paired with brass trim and a high performance pneumatic actuator featuring