Siemens Building Technology 331-2976 Actuator 318172-701 specifically fitting models such as
Baker’s notes & crumb story
Description
Siemens Building Technology 331 2976 Actuator 318172 701 specifically fitting models such as specifically fitting models such as the BYC130 series and other vertical horizontal gas units this modulating zone valve is a drop in solution for contractors seeking a 3 4 inch HVAC zone valve that balances high performance flow with reliable fail safe operation