The Cleveland Controls DFS-448-153 is a purpose-built air flow switch designed for critical monitoring in industrial HVAC systems

Structural Integrity: Constructed with heavy-duty materials to withstand high torque loads and outdoor weather conditions

System Integrity: Prevents bypass leaks and pressure drops

You must always match the Maximum Overcurrent Protection (MOP) listed on the HVAC unit's data plate to prevent damage to the internal wiring and system components

repeatable positioning for modulating or two-position control applications

Browning BK34H Sheave 320788-704 The Cleveland Controls DFS-448-153 isThe Browning BK34H Sheave is a precision machined single groove cast iron pulley engineered for heavy duty power transmission in HVACR drive systems. Featuring a 3. 55" outside diameter, this BK series sheave is designed to interface with H series split taper bushings, ensuring a secure, concentric fit on the shaft that minimizes vibration and axial runout. Its versatile groove profile is compatible with 4L, 5L, A, and B section belts, making it a