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the 337668-701 is a direct replacement for legacy numbers
while the sensor operates as a non-communicating device for temperature sensing
this hot surface ignitor features a robust silicon carbide or nitride construction to withstand the high-temperature environment of the burner assembly
and safety shutdown functions to help ensure reliable burner operation
Belimo B249 Valve 326070-701 the 337668-701 is a directThe Belimo B249 is a high performance 2 way characterized control valve designed for precision in hydronic systems. Featuring a 2 inch NPT female connection and a 46 Cv rating, this valve utilizes a specialized Tefzel characterizing disc to maintain an equal percentage flow characteristic. This design effectively eliminates the "hunting" common in standard ball valves, providing stable control across air handling units, VAV boxes, and fan coil
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