Browning 2TB74 Sheave 321042-401 Check for 24V at the

Check for 24V at the valve during the ignition sequence

it replaces legacy or obstructed traps to maintain the atmospheric seal required for optimal pressure switch performance

the Browning 2BK sheave series is the industry standard for durability and reliable two-groove pulley performance in demanding mechanical environments

ensuring the heater is sufficiently primed before the HVAC blower switch engages

Reducing the pipe size to fit a smaller manifold may restrict gas flow and compromise the HVAC system performance and safety certifications of the heater

Browning 2TB74 Sheave 321042-401 Check for 24V at theThe Browning 2TB74 Sheave is a precision engineered two groove TB Gripbelt sheave designed for high performance power transmission in commercial HVACR and industrial blower applications. With a 7. 75" outside diameter and a 7. 4" pitch diameter for B belts, this cast iron pulley is dynamically balanced for standard operating speeds and utilizes Q1 Series split taper bushings to ensure a secure, concentric fit on the shaft. It is engineered for