Hydro-Chek Coarse Bubble Diffusers are the result of years of extensive research and development. They combine a simplicity of design with quality construction to provide efficient, economical, trouble-free continuous gas diffusion. The DP Series diffuser utilizes plastic for the diffuser body while the DS Series is constructed of stainless steel.
The Hydro-Chek Diffuser has a patented “downflow” mushroom-shaped design. It utilizes a simple circular pattern of orifices to produce coarse bubbles which take the form of a plume when the bubbles are discharged. The bubbles then pass through the liquid and rise to the surface in a constant stream providing gas transfer. A flexible diaphragm is positioned over the top of the entire diffuser covering the orifices. The diaphragm of the diffuser becomes extended when gas is flowing - thus allowing it to flow from the orifices and form coarse bubbles. The diaphragm is held in place over the orifices on the diffuser body with two piece locking retainer ring. When gas is not flowing, the diaphragm retracts and seats itself over the orifices with pressure generated from liquid in the aeration tank. This design feature acts as a check valve when the diffuser is not aerating. Thus the backflow of liquid to the gas distribution system is prevented.
The downflow design on the Hydro-Chek Diffuser eliminates problems associated with sediment formation in the orifices. Particulate matter will settle away from the diffuser because of the downflow configuration - thus minimizing the chances of clogging. It also maximizes the shearing effect on the bubbles as they emerge from the orifices and float upward away from the perimeter of the diffuser forming a plume around the diffuser. These diffusers operate effectively at a wide range of air flows up to 12 CFM.