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Smith boiler and water heater assemblies
This bored-to-size (BTS) flange features a precision-machined 1-3/8 inch bore with a standard 5/16" x 5/32" keyseat
What is the purpose of the Teflon sheathing on this specific model
Most failures result from loose set screws or over-driving the motor past the mechanical stops
this auto limit switch functions as a primary safety control
Lennox 59W21 TXV Els PW 29614 Smith boiler and water heaterThe Lennox 59W21 Thermal Expansion Valve (TXV) is a critical 8 ton metering device engineered for precision refrigerant control in high capacity commercial HVAC systems. Designed with 3 8" x 1 2" ODF sweat connections, this valve ensures accurate superheat maintenance across varying load conditions, preventing liquid floodback and protecting the compressor. The 59W21 features a 30 inch capillary tube and is officially rated as the direct replacement
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