Belimo B309B Valve 323055-751 Always inspect the heat exchanger

Always inspect the heat exchanger before resetting

500 hours of backup protection

ensuring consistent heating performance across commercial and residential HVAC footprints

Ensuring proper flue gas evacuation is a non-negotiable step in maintaining any high-efficiency furnace

Low Power Consumption & Zero Bleed: High-efficiency poppet valves eliminate air waste during steady-state operation

Belimo B309B Valve 323055-751 Always inspect the heat exchangerThe Belimo B309B is a high performance 1 2 inch 3 way characterized control valve designed specifically for demanding hydronic HVACR applications. Engineered with a 0. 8 Cv rating, this NPT threaded ball valve features a Tefzel characterized disc that ensures an equal percentage flow characteristic on the A port, providing the linear heat output necessary for stable control in air handling units and fan coil systems. The B port is modified to maintain