HYDROVEX® Bending Weir
All combined sewer systems have overflow points to an outfall. When a defined water level is exceeded in the system, the surplus water is diverted to avoid overloading of the sewer line and the WWTP. Most overflow points are equipped with fixed static weirs. The maximum allowable water height used to set the weir level is defined by the acceptable upstream backflow in the sewer line with a given design flow and weir length. The height of the overflow weir is of paramount importance as it directly affects the sewer retention calculation. In an attempt to maximize in-line retention volume, long static weirs and correspondingly large overflow structures are required.
The HYDROVEX® BW Bending Weir is an optimized overflow weir which is more efficient than a conventional static weir. Due to its proportional overflow characteristics, a bending weir is typically equivalent to a fixed weir which is 2 to 5 times longer for the same overflow rate and water level. The HYDROVEX® BW Bending Weir operates automatically without the aid of auxiliary power, moving bearings, counterweights, pulleys or sliding seals. This results in a highly reliable and efficient equipment with a long service life. Maintenance is minimized due to the weir’s low susceptibility to wear.