- Flow rates: 200 – 2,000 m3/h
- Connection diameter: 200 – 355 mm (8″ – 14″)
- Filtration degree: 20 to 400 micron
- Max. working pressure: 10 bar
HOW IT WORKS
The 4″ Spin Klin™ Galaxy series disc filters are modular, all-polymeric and include a patented automatic self-cleaning backwash mechanism. The flow rate of the 4″ Spin Klin™ Galaxy systems ranges from 200 to 2,000 m3/h with filtration finenesses ranging from 20 to 400 microns and inlet/outlet diameters from 200-355 mm (8″ – 14″).
THE FILTRATION PROCESS
Arkal’s specially developed disc filtration technology works with thin, color-coded polypropylene discs with a specific micron size. The discs are grooved diagonally on both sides, in opposite directions. A series of discs are compressed by means of a preloaded spring.
The grooves of two adjacent discs, pressed together, create a series of intersections that form multiple particle traps. During the filtration process, the force of the spring along with the differential pressure firmly compresses these discs, providing exceptional filtration efficiency. Filtration occurs when water flows from the outside to the inside of the filter element. Depending on the micron range, there are multiple crossing points in each lane, providing exceptional depth filtration.
2 KINDS OF BACKWASH ARE POSSIBLE
- With your own filtered water
- With water from external source
1. THE BACKWASH PROCESS.
Activated by a predetermined time setting or adjustable differential pressure, the system switches to backwash mode. The inlet valve closes while the flush outlet valve opens. During the rewinding process, the pressure is released and the spring relaxes, releasing the pressure on the discs. Filtered water is then forced through the nozzles placed along the frame with discs. At this stage, the discs spin freely, loosening the stuck particles and then washing them away.
During the backwash cycle, each filter section is rinsed sequentially, while the other filter sections continue to deliver filtered water downstream. When a module begins its backwash cycle, the system valves automatically reverse the flow in that module, allowing filtered water under pressure to clean the filter downstream.
2. EXTERNAL SOURCE BACKWASH (WITH WATER FROM EXTERNAL SOURCE)
Each filter is sequentially flushed, while the other filters continue to deliver filtered water.
In the filter where backwash is active, the inlet and outlet valves as well as the outlet and supply are automatically opened and closed.
Pressurized water from an external source enters the filter through the outlet valve and flushes the filter.
ADVANTAGE: Higher energy for low operating pressure applications and high degree of fine filtration
Available discs according to filtration fineness