Lennox 50W74 Gas Valve 328140-751 The Belimo KH10 Crankarm is

The Belimo KH10 Crankarm is a heavy-duty mechanical accessory designed for precision damper linkage applications

With a 1/4-inch barbed hose connection and a maximum control pressure rating of 25 psi

which requires EPA certification and specialized HVAC tools

The assembly features a high-grade Style 4 bulb measuring 11/16" in diameter and 6" in length

Built with Internal Trim Package 1 and Buna body O-rings

Lennox 50W74 Gas Valve 328140-751 The Belimo KH10 Crankarm isThe Lennox 50W74 is a direct replacement White Rodgers 36G24 463 natural gas valve designed for high efficiency Lennox gas furnaces. This single stage gas valve operates on a 24V redundant solenoid system, featuring a 1 2" NPT inlet outlet configuration for standard manifold alignment. Engineered for precision fuel regulation, it utilizes an intermittent pilot ignition or direct spark system depending on the furnace control board configuration. The