Air Balance Volume Control Dampers

A division of Mestek, Inc., Air Balance is backed by the finest collection of engineers and state-of-the-art production equipment for the manufacture of your HVAC requirements: commercial office buildings, hospitals, schools, prisons, etc.
Volume Control Dampers are designed for two primary functions; two position (open/closed) or proportional (modulating). ABI has developed a complete line of volume control dampers that meet a variety of applications, with many different features such as aluminum or stainless steel construction, airfoil blades, flanges, seals, and an extensive actuator offering from the industry's leading actuator manufacturers.
Our standard designs are available for "quick ship" programs of two weeks or less. Our nationwide network of representatives and our dedicated customer service professionals will work together to bring you the best solutions for your requirements.

VOLUME CONTROL · RECTANGULAR IN-DUCT MOUNT
Model Description Maximum Face Velocity Maximum
Pressure		 Maximum
Temperature		 Sample
AB-1 (Parallel)
AB-2 (Opposed)		 Hat channel frame, single thk. blades, galv. steel constr., no stops provided, balancing applications. 2000 fpm (10m/s) 4 in. wg. (1000 Pa) 200°F/95°C
AC-1 (Parallel)
AC-2 (Opposed)		 Hat channel frame, single thk. blades, galv. steel constr. 2000 fpm (10m/s)
3000 fpm (15m/s)		 4 in. wg (1000 Pa) 200°F/95°C
w/o seals
AC-111 (Rectangular)
AC-112 (Round)		 Hat channel frame, single thk. blades, balancing damper, galv. steel constr., low pressure, low velocity 1500 fpm (8m/s) 1 in. wg. (250 Pa) 150°F/65°C
AC-525 (Parallel)
AC-526 (Opposed)		 Hat channel frame, airfoil blades, aluminum constr. 4000 fpm (20m/s) 6 in. wg. (1500 Pa) thru 48"(1219)W; 3 in. wg (750 Pa) above 48"(1219) W. 150°F/65°C

VOLUME CONTROL · ROUND IN-DUCT MOUNT
AC-25 Sleeve frame, double thk. blades, low leakage, galv. steel constr. 3000 fpm (15m/s) 6 in. wg. (1500 Pa) 150°F/65°C

VOLUME CONTROL · RECTANGULAR FLANGE MOUNT
AC-411 Channel frame, single thk. parallel or opposed blades, galv. steel constr. 3000 fpm (15m/s) 10 in. wg. (2500 Pa) 250°F/120°C