Key Benefits Linear Resistance Response: The PTC silicon sensor element provides predictable resistance changes

This single-pole single-throw (SPST) switch ensures precise combustion by verifying proper static pressure before allowing the ignition sequence to proceed

The Schneider Electric 22-138 Gauge Adaptor is a critical fitting designed for precise pneumatic system diagnostics and calibration

There is no functional or electrical difference

Always match the voltage and wattage to the existing valve nameplate

Bard HVAC 5651-191BX Expansion Valve 30067439-890 Key Benefits Linear Resistance Response:The Bard 5651 191BX Expansion Valve is a critical thermostatic expansion valve (TXV) designed for precise refrigerant metering in Bard air conditioners and heat pump systems. Featuring 3 8" x 3 8" connection sizes, this component regulates liquid refrigerant flow into the evaporator coil based on cooling load requirements. This specific part is a direct replacement, confirmed identical to 5651 191, ensuring a seamless fit for technicians performing