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ensuring proper airflow monitoring and furnace sequencing

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Belimo B330 Valve 30067439-890 Always verify your specific modelThe Belimo B330 is a high performance 1 1 4 inch 3 way characterized control valve engineered for precise modulation in hydronic systems. Featuring a 19 Cv rating and NPT female pipe ends, this valve utilizes an A port with an equal percentage flow characteristic and a modified B port to ensure consistent common port flow. The construction consists of a nickel plated forged brass body paired with a 304 stainless steel ball and stem, making it suitable