The ACU-BEND Bending Weir System is designed to maintain maximum water levels upstream of the weir, thus allowing full usage of all the available upstream storage volume, while not adversely affecting the overflow weir capacity in Combined Sewer Overflow (CSO) applications. The ACU-BEND’s unique, patented and extensively tested design operates by only allowing any excess water in the system to reach the receiving stream but only after the design upstream water level is reached. This increases the tank and sewer storage volume and reduces the frequency and volume of overflow events, resulting in a decrease in water pollution. This allows the ACU-BEND to overcome the fixed weir’s inherent disadvantages. The ACU-BEND can also create an airtight seal which protects against backflow and controls odor as it is normally in the closed position.
The only mechanical components of the system consist of sleeve bearings requiring no lubrication; therefore the need for maintenance is reduced assuring economic and trouble free operation. The ACU-BEND’s compact design allows for easy installation in new overflow structures or can be easily retrofitted directly over existing fixed weirs. The following components are included in the ACU-BEND Bending Weir System: the bending weir flap, the sleeve bearings, the anchoring system, the counterweights and the inclinometer.
