QS-Type Nozziles For Underdrain Systems

The air-water backwash process for filter beds utilizes the thorough friction of expansion of the filter media layer and low-intensity water flushing, resulting in high media filter layer cleanliness and water savings. The selection of nozzles and the manufacture of nozzle floor are key to ensuring effective air-water backwashing.

As early as the 1980s, Zhongchang Company was the first in China to develop and successfully manufacture the QS-type nozzles specialized for air-water backwash, which was granted a national patent. Following fluid mechanics characteristic testing conducted by Harbin Institute of Civil Engineering and Architecture, a method for calculating head loss was proposed and recognized by the National Standardization Technical Committee for Water Supply and Drainage Engineering.

This product is a nationally recognized new and superior product, having won the Gold Award at the National Practical Technology Exhibition and Trade Fair, and was jointly evaluated by the Ministry of Construction and the State Science and Technology Commission as a priority recommended product. It is widely used in new water plant filter pools and retrofitting projects for existing water plant filter pools.

Product Features

• Made of food-grade ABS engineering plastic through injection molding, featuring high performance and strength, non-toxic, and resistant to aging.

• Rational structural design ensures uniform air distribution and water distribution, no dead zones, no cap detachment, and minimal head loss.

Product Specifications