The DPST (Double Pole Single Throw) configuration and normally open circuit provide reliable switching

Smith 100278092 Switch is a critical safety and operational component designed for high-performance commercial boilers and water heaters

Robust Construction: Built to withstand industrial temperature fluctuations and continuous duty cycles in mechanical rooms

they are the same part

the pressure drop through the evaporator is often significant

Bray Commercial 300600-11010119 Valve 319852-301 The DPST (Double Pole SingleThe Bray 300600 11010119 is a high performance 6 inch wafer style butterfly valve from the Series 30 Full Cut line, engineered for precise flow control in demanding industrial and HVACR environments. This cast iron butterfly valve features an ASTM A126 Class B body and an EPDM seat (Ethylene Propylene Diene Monomer), providing a resilient bubble tight shutoff and excellent chemical resistance at temperatures up to 250F. The ASTM A536 ductile iron disc