though you should always verify your specific fan blade bore before mounting

the components are built to withstand the rigors of industrial HVACR valve maintenance

this dark green spring provides a reliable working range of 4-9" WC (Water Column)

If your replacement motor has a larger shaft

Its linear pneumatic motion ensures smooth operation on damper shafts

Greenheck (Venco) VCDR-53-18-KIT Damper R-448A though you should always verifyThe 18 inch Greenheck (Venco) VCDR 53 18 KIT Damper is a high performance round air control damper engineered for low to medium pressure HVAC systems. Built with a robust 20 gauge galvanized steel frame and blades, this unit is designed to withstand velocities up to 3000 fpm and differential pressures up to 4 in. wg. As a "KIT" configuration, it specifically includes an actuator mounting bracket, facilitating seamless integration with automated