Raindog first flush unit for underground tanks

摘要

#$%^&*AU2010200490A120120301.pdf#####ABSTRACT The disclosed RAINDOG first flush unit for underground tanks has three functional parts, volume reduced chamber in adjustable proportion to the required volume of first flush (thereafter its abbreviation is "the chambe'), axis unbalanced tipping valve (thereafter its abbreviation is "the va/ve") and self clean valve. The chamber can count approximate the amount of first flush has gone into storm water drain according to roof area and once the capacity of the chamberis reached it will generate mechanical signals in terms of floating force to the valve and a self clean valve. The valve shuts and opens according to the chamber and the valve system which determines whether and when first flush goes into storm water drain or rainwater goes into underground tank. The self clean vale is a necessary component for this system as the device is made maintenance free. It can flush out rainwater (first flush) from the chamber to get rid off mud and other possible settlements each time after first flush completed. This device is fully mechanically automatic operated.