Siemens Building Technology 257-02055 Valve Assembly 321702-401 It is calibrated to activate

It is calibrated to activate the system at 130 PSI and provide a safety cutout at 100 PSI

ensuring accurate flame signal strength for consistent burner management performance

The Parker D400P3 Coil is a heavy-duty 120V 10W solenoid coil engineered for precise actuation in Parker Fluid Control valve assemblies

this valve operates efficiently across a pressure range from vacuum to 125 PSI

providing a stable 5 psi or 10 psi span for consistent pneumatic actuator cycling

Siemens Building Technology 257-02055 Valve Assembly 321702-401 It is calibrated to activateThe Siemens 257 02055 Valve Assembly is a high performance 2 way normally open valve designed for precision control of hot or chilled water and low pressure steam in terminal units. Built on the rugged Powermite 599 MT Series platform, this assembly features a 1 2 inch NPT connection and a 2. 5 Cv flow coefficient. The forged brass body is paired with stainless steel trim to ensure long term durability and resistance to scaling in demanding hydronic