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Proof of Closure Switch: Built-in interlock switch provides positive mechanical verification of the valve’s closed position for enhanced safety compliance
Key Benefits for Technicians: Direct OEM Compatibility: Verified fit for A
An integrated internal check valve makes this unit fully compatible with heat pump applications
heavy sludge accumulation that cannot be cleared
Lochinvar & A.O. Smith 100171926 Valve 321702-401 Proof of Closure Switch: Built-inThe Lochinvar & A. O. Smith 100171926 Gas Valve Kit (SBN1500) is a critical OEM replacement part designed for high input commercial boilers and water heaters. Engineered for precision gas flow regulation, this negative pressure regulated gas valve ensures the correct air to fuel ratio across the entire firing range. It is specifically calibrated for the SBN1500 model series, providing the necessary BTU input stability required for high efficiency
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