Reliable combustion chamber insulation is the primary defense against cabinet hot spots and inefficient fuel consumption in Dunkirk residential boilers and commercial heating units

technicians rely on this specific OEM McQuay part to match the exact tolerances required for long-term reliability

Constructed from high-grade ceramic insulation and a durable metal alloy tip

Durable Construction: Built to withstand constant thermal cycling without drift in the cut-in or cut-out temperature settings

This component is the direct replacement for 50DK501891

Browning 3L330 Belt 321702-401 Reliable combustion chamber insulation isThe Browning 3L330 Belt is a heavy duty fractional horsepower (FHP) V belt engineered for reliable performance in light duty industrial and HVAC applications. Featuring a 3L cross section with a 3 8 inch top width and a 7 32 inch thickness, this wrapped construction belt is designed specifically for small sheave diameters where flexibility is paramount. Its 33 inch outside diameter and 32. 3 inch pitch length ensure precise tensioning and efficient