and DS Series
Coarse Bubble Diffusers
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.
which are located in the flexible diaphragm on some competitive
models are subject to performance robbing strains, fatigue, and
ultimately failure. The orifices of the Hydro-Chek Diffuser are
located in the rigid structure of the diffuser body elimination
this problem. The Hydro-Chek Diffuser bodies are available in the
two materials of construction - molded plastic and stainless steel.
The DP Series diffuser body is made of molded acetal plastic which
is impact resistant and non-corroding. It resists fouling by algae
or other foreign materials. For use in hostile environments, the
DS Series of diffuser bodies are constructed of type 304 or 316
series stainless steel. Not only do they provide outstanding durability,
but they are resistant to chemical attack. The diffuser bodies are
available with 3/8” or 3/4” NPT threads, depending on model and
air check diaphragm of the diffuser is molded of an EPDM elastomeric
which is flexible, resilient and resists both fatigue and chemical
attack. Because of its excellent flexibility characteristics it
provides positive sealing action when the diffuser is not operating.
Typical applications for the Hydro-Chek Coarse Bubble Diffuser
and aeration chambers
wastewater treatment plants
pressure equalization applications
value blow off pipes on aeration system
The DS-38 diffuser (left) provides a flow
range of .5 to 3 CFM,
while on the right, the DS-75 produces a 3 to 12 CFM range.