AIDA Automatic Self-cleaning Screen Filters
Product Details
AIDA automatic self-cleaning screen filters can remove suspended solids from 1500 to 10 micron. The AIDA-Series filter bodies are manufactured in 316L stainless steel, made in the china, and are competitively priced. The cleaning cycle takes less than 15 seconds and does not interrupt the filtration process.
The AIDA-200 series provides automatic filtration down to 10 micron for flow rates 7 to 50 m3/hr (30 to 220 gpm). Process water, cooling tower filtration, pre-filtration of membrane, seawater, irrigation, or wherever suspended solids are removed down to 10 micron are applications perfectly suited for the AIDA-200 Series. Constructed of glass reinforced nylon and 316L stainless steel, the inherently corrosion resistant materials of the AIDA-200 Series ensure a long service life under a wide range of water quality conditions.
HOW IT WORKS
Dirty water enters the filter through the inlet
(1) and then passes through the coarse screen
(2) from the outside in. It flows from the inside of the coarse screen to the inside of the fine screen and then passes through the fine screen
(3) from the inside out. Dirt is collected on the inside surface of the fine screen. The clean filtered water then exits through the filter outlet
(4).As the dirt or cake builds up on the inside surface of the fine screen, the pressure drop across the screen increases. When the pressure drop (the DP or differential pressure) reaches a preset level 0.5 bar (7 psi), the filter controller starts a flush cycle by opening a flush valve on the flush outlet
(5). This flush valve exhausts the flush chamber to atmosphere at “0” psi. The flush outlet is connected to the flush chamber which is separated from the filtration chamber by a lower bulkhead. However, the dirt collector
(6), thus providing a “path” from the suction nozzles
(7) (a hollow pipe with suction nozzles) extends through the partition
(8) through the water motor
(9),into the flush chamber and out the flush outlet to atmosphere. The pressure around the suction nozzle is the pressure inside the filter and as water flows through the “nozzle orifice,” it drops to “0”
The suction nozzle clearance at the fine screen is very small so the extreme low pressure at the nozzle opening creates a vacuum causing backflow to pull the dirt from the fine screen.
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