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the S8401-007 is the official updated version provided by Bard to replace the older 8401-007 model without requiring cabinet or wiring modifications
Visible leakage around the packing box nut or inconsistent valve positioning typically indicates a worn seal
Key Benefits OEM Compatibility: Guaranteed fit for York
Critical for maintaining energy efficiency in HVAC pneumatic systems
This kit focuses on the integral backflow prevention components
Armstrong International D24660 Operator Els PW 17895 the S8401-007 is the officialThe Armstrong International D24660, also identified as part number 6005640, is a heavy duty LV 4 Direct Valve Mounted Thermostatic Operator engineered for precise hydronic temperature control. This unit features a high sensitivity liquid filled sensor that provides superior responsiveness to ambient temperature fluctuations compared to standard wax filled alternatives. Designed for seamless integration with Armstrong radiator valves, the D24660
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