reducing pressure drop across the S21 series valve assembly

the burners are designed to withstand high-temperature oxidation and prevent premature port clogging

Flexible Installation: Compact 3/4" NPT footprint allows for straightforward integration into existing gas trains and manifold assemblies

Operators can utilize the manual bias adjustment to retard or advance the output by +/- 15 PSI

a functioning P043800 should produce approximately 750mV under open-circuit conditions (disconnected from the valve) while heated by the pilot flame

Lochinvar & A.O. Smith 100233678 Fan Gasket 320819-301 reducing pressure drop across theAs a field technician, you know that maintaining a precise seal in the combustion assembly is non negotiable for system safety and peak thermal efficiency. The Lochinvar & A. O. Smith 100233678 Fan Gasket is a critical OEM component engineered to provide a high temperature seal between the combustion fan and the blower transition or venturi assembly. Designed specifically for use in Lochinvar Knight boilers and high efficiency A. O. Smith commercial