201 and 201AA – disc filter
Automatic Self Cleaning equipment with disc filter element. Includes special equipment to adapt manual to automatic installations. Max flow 105 gpm.
Automation available in 110 V. There are special options available for Low Pressure, High Pressure and Sea/Saline water conditions. Also possible to backwash with compressed air, minimizing the water loss during backwash. (201 AA – Air Assist System)
See more on the air assist filter at the bottom of this page.
FILTERS ALL KINDS OF PARTICLES
Organic , in-organic, and fibrous
FILTRATION AND BACKWASH OCCUR SIMULTANIOUSLY
Only a portion of the water is used for backwash in multi element systems.
LARGE FILTRATION SURFACE AREA
The discs are available in Multi-Groove (MG) or Wall type depending on the application they are needed for. The MG discs provide depth filtration resulting in very high efficiency at a given micron level.
The width and support structure of the discs provided high resistance to the pressure differential across the filtration surface.
The superior quality of the injection molding of the discs provides uniformity of the discs which results in high efficiency at the selected micron level.
The Helix is a centrifugal action device on the inlet to the filtering element which forces the inlet water to spin around the discs inside the filter housing, this forces the larger particles away from the discs reducing the accumulation of solids on the filtration surface, thus optimizing the performance of the discs and reducing the frequency of backwashing
AUTOMATIC CLEANING OF FILTER ELEMENTS
Filtration Stage: The Helix generates a centrifugal helical effect upon entry into the filter, this moves the particles away from the discs. The water then passes efficiently through the depth of the uniquely designed discs.
Backwashing Stage: Clean water from an auxillary filter or resevoir (in Air Assist systems) is introduced from the reverse direction through the backwashing filtering element. This hydraulically decompresses the stack of discs, allowing the discs to separate and backwash efficiently.
The solids are expelled from the discs and evacuated through the backwash manifold.
The filtration process then restarts with the compression of the discs.
The backwash is controlled by two valves and a controller, which integrate the
filtration equipment. The backwash is initiated by pressure differential or time.
No tools required. Very few warring parts
MANUFACTURED IN PLASTIC
The patented design and the materials used in manufacturing the filters guarantee a long life with high resistance.
The maximum operating pressure and temperature of the standard equipment is 145 psi at 140⁰F.
WATER AND ENERGY SAVINGS
Amount of water used during backwashing cycle is significantly less than with other types of automatic cleaning filters. Time between backwashing cycles is increased by the design of the Helix system.
All products go through stringent quality control before leaving the factory.
FACILITATES EASY TRANSPORTATION AND INSTALLATION
Equipment is shipped pre-assembled (Only limited assembly requird on site)
Backwashes only one station at a time. The remaining stations stay in filtration mode and continue to supply clean water to the process
Available in 2″, with flows up to 105 gpm (with 130µ discs).
Maximum Operating Pressure: 145 psi
Maximum Operating Temperature: 140⁰F
Disc options – 5µ, 10µ, 20µ, 50µ, 100µ, 130µ, 200µ and 400µ.
SPECIAL FEATURES OF AIR ASSIST (AA) BACKWASHING SYSTEM
The 201AA filter consists of a filter element to a backwash water resevoir and 2 valves.
Using the Azud patented AIR INJECT system air is injected throughout the backwashing process.
Low operating and backwashing pressure – from 17.5 psi
Externally supplied compressed air at 65 psi is required for the backwash
Compressed air supply is only required during the backwash process.
80% less backwash water is used by the air-assisted systems (12.6 gpm) compared to the standard AZUD models.
Air and water are very effective scrubbers in the backwashing process.
Backwash uses only clean filtered filtrate even though only one filter element is used. This is possible because of the use of the reservoir.
How it works: Air assisted backwash video