Siemens Building Technology 277-03170 Valve Assembly 321042-401 Replacing a fouled or corroded

Replacing a fouled or corroded pilot assembly is essential for preventing nuisance lockouts and ensuring efficient combustion cycles

For technicians troubleshooting a "GV Relay Fail" or ignition lockout

Simplified Wiring: Includes a built-in transformer to power internal circuitry and clear terminal block connections for faster field installation

this modulating actuator provides reliable service in air plenums and compact mechanical spaces

Reliable Venting: Efficiently purges toxic combustion byproducts to maintain indoor air quality and safety

Siemens Building Technology 277-03170 Valve Assembly 321042-401 Replacing a fouled or corrodedThe Siemens 277 03170 Valve Assembly is a heavy duty 2 way normally open globe valve engineered for precise modulating control in hydronic heating and cooling systems. Built with a rugged UNS CA 844 bronze body and durable brass trim, this 2 inch NPT assembly is rated for ANSI Class 250 applications, supporting a 40 Cv flow capacity with an equal percentage flow characteristic. This ensures linear heat output even during fluctuating pressure drops,