Designed as a dual-stage differential switch

this Siemens pneumatic selector switch ensures long-term stability and precise signal pressure direction in complex HVACR automation sequences

while providing a moisture barrier that prevents contamination of expensive systems

This straight-style furnace flame sensor features a 13/16-inch rod and a 20-1/2 inch lead with a female spade connector

Carrier 50DK400309 Exhaust Regulator 326058-757 Designed as a dual-stage differentialThe Carrier 50DK400309 Exhaust Regulator is a critical OEM component designed to maintain precise atmospheric pressure and ventilation control within commercial rooftop units and heavy duty HVAC systems. As a veteran technician knows, managing exhaust air pressure is vital to preventing back drafting and ensuring the mechanical integrity of the heat exchanger. This genuine Carrier replacement part is engineered to withstand the high velocity discharge