this HVAC refrigerant valve maintains the exact superheat settings required to protect the compressor from liquid slugging while maximizing heat transfer across the evaporator

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This normally closed solenoid valve is uni-directional

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and flame rectification check to ensure the burner remains lit safely

Lochinvar & A.O. Smith 100173749 Door 319852-301 this HVAC refrigerant valve maintainsThe Lochinvar & A. O. Smith 100173749 Heat Exchanger Access Door is a critical combustion chamber component engineered for Lochinvar Knight WB and SNA SLA series boilers. As a veteran grade OEM replacement part, this access door (WB model) ensures a high pressure seal for the heat exchanger assembly, facilitating essential annual maintenance and internal fire tube cleaning. Built with heavy duty materials to withstand high thermal stress, it maintains