The SD™ line of round mechanical dampers provides you with a Commercial grade round damper at a price that competes with residential grade dampers. The quality of materials is "second to none" and is backed up by a 5 year - Best in Industry Warranty.

Due to the low sales volume on these 3” and 4” sheet-metal dampers, a slightly different damper can may be used than the one pictured. This damper will still feature a Belimo LMB24 motor.

Features:

• • Belimo LMB24-3-T 3 Wire Power Open/Power Close Brushless Motor
• • True Commercial Quality
• • 45 in - Ibs Torque
• • Minimum Open and Close Adjustments 
• • 90 second activation
• • Motor will not heat up
• • Can operate same as a spring return damper in Slave Zone set-up
• • Rated up to 2 in. of Static Pressure
• • *Heavy 22 gauge construction with 18 gauge blades. 
• • *Welded, leak proof seams-not riveted. 
• • *Durodyne commercial 1/2 inch drive shafts 
• • *Durodyne Bronze Bearings with anti rattle washers
• • *Bolted on blades with 3/16 hardware-Blades will not vibrate off!
• • Duro-Dyne Direct Coupled Linkage, Bronze
• • Bushings, and a 1/2 in. universal drive shaft

5 Year Warranty!

Best industry warranty available! Motor covered by conditional Belimo manufactures warranty for up to five years; exclusions apply.  Copy of complete warranty available upon request. 

- Heavy gauge galvanized steel with reinforcing

beads for super duty strength

- Compatible with any zoning system or application using a power open / power close damper + works with slave zones!