High-Rate Automatic Backwashing Screen Filtration System
Automatic Backwashing Screen Filter provides the ultimate in high-rate screen filter performance. Powered by source line water pressure, the filter's patented backwashing valve system produces a reverse flow to flush the system of entrapped contaminants.
During the brief backwashing cycle, a portion of the clean water produced by the system is diverted to the filter unit undergoing backwashing. This reverse flow of filtered water frees contaminants from the filter screens. Each filter canister is sequentially backwashed until the entire system is cleaned.
Cleaning Process
When the difference in pressure reaches the preset value on the electronic control unit, a series of events is triggered while water continues to flow to the system units. The flushing valve opens, pressure is released from the hydraulic piston, and water flows outside. Pressure in the hydraulic motor chamber and the dirt collector is significantly lowered, and the dirt collector nozzles begin a suction process. The water flows through the hydraulic motor, which rotates the dirt collector around its axis. The pressure released from the piston and the high pressure inside the filter, cause linear movement of the dirt collector. The combination of the linear movement and rotation significantly cleans the whole internal screen surface. The flushing cycle takes 5 seconds. The flushing valve closes at the end of the cycle and the increased water pressure returns the system to its initial position. The filter is now ready for the next cycle, with clean and filtered water flowing through the "Outlet".
Application Fields
Power Plants : Treatment of Industrial Water for cooling generators and filtration of
sealing water to increase the service life of the Turbine Shaft sliding-ring seals in
Hydro-Electric Power Stations.
Steel Industry: Protection of nozzles and pumps during high-pressure descaling, water
treatment for blast furnaces, rolling mills, cleaning, quenching applications.
Chemical Industry : Improvement of product quality by filtering process media. Filtration
of White water, Black Liquor, Starch, Fuel oils, Caustic Solutions, Cooking oils,
brackish/salt intake water etc. For filtration of water used for cooling, process, fire
protection applications.
Pulp & Paper Industry : Removal of fibers from white water filtrate, Protection of spray
nozzles for screens of paper making machines. This reduces frequent failures caused due to
clogging and wear.
Mining: By filtering underground, spray water of even quality is assured. This results in
more reliable operation of pumps and disc cutting machines
Environmental Technology. Used as pre-filters before waste water treatment plants, UV
Treatment, Reverse Osmosis, membrane filtration etc.
Sewage Treatment Plants : During Production of industrial water, filtration of a take off
of the clear run can be used to save valuable drinking or well water.
Heat Transfer / Heat Supply : Protects heat Exchangers from clogging & wear
Chracteristics of SS multi-cartridge automatic backwash filter
Heavy-duty, durable, low-cost automatic screen filtration system
Flow rates from 250 to 5,000 GPM (will convert to metric)
Standard maximum operating pressure: 150 PSI (ditto)
Rugged, permanent, stainless steel wedgewire screens available in sizes 40, 60, 80,100 or 150 mesh
Vertical configurations available for limited space applications
Large screen area provides long runs between backwash cycles
Filtered, clean water backwashing automatically initiated by time and pressure differential
Flanged or grooved inlet and outlet configuration available
Optional solar package and DC latching solenoid available.
Solar package includes a solar panel, battery pack, metering system, wiring harness and enclosure box
No moving parts inside the filter canister to wear out
Important parts for filtration system:
01. Carbon steel cycloner,
02. Stainless screen,
03. Butterfly valve
04. Sewage device, etc.
Technical Parameters:
| Model |
Flow
(T/h) |
Inlet and outlet diameter
(mm) |
Drainage diameter
(mm) |
D
(mm) |
H
(mm) |
H1
(mm) |
H2
(mm) |
| YLF-50 |
70 |
DN50 |
DN50 |
300 |
1690 |
265 |
640 |
| YLF-80 |
80 |
DN80 |
DN50 |
350 |
1720 |
265 |
660 |
| YLF-100 |
120 |
DN100 |
DN50 |
400 |
1760 |
265 |
680 |
| YLF-200 |
200 |
DN200 |
DN80 |
500 |
1860 |
290 |
715 |
| YLF-250 |
280 |
DN250 |
DN80 |
600 |
1930 |
290 |
755 |
| YLF-300 |
450 |
DN300 |
DN100 |
700 |
2040 |
335 |
755 |
| YLF-350 |
600 |
DN350 |
DN100 |
800 |
2105 |
335 |
770 |
| YLF-400 |
800 |
DN400 |
DN100 |
1000 |
2220 |
335 |
800 |
| YLF-500 |
1000 |
DN500 |
DN100 |
1200 |
2360 |
365 |
825 |
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