OPERATING PRINCIPLES

As the water enters into filter inlet (1), it is pre-filtered through the coarse screen (3) to prevent the large particles ingress that will damage fine filter and internal parts. Then water flows into the second filtration section that contains multi-layered fine screen (4). This screen is protected by a robust coarse mesh that also provides a pre-filtration. While water passes through the fine screen towards outlet (2) the particles within the water accumulates on the inside surface of the fine screen and produce a dirt layer. As the dirt layer builds up on the screen, it will cause a pressure loss on the downstream side of the screen. The dirt layer itself will act as a filter and collect much smaller particles than the stainless screen. When the pressure differential reaches a certain level a back-flush should be started to clean fine screen. At a preset value (0.5 bar), back-flush control unit (12) opens cleaning discharge valve (9) and a strong back-flush flow that goes off to the atmosphere via drainage pipe (11) occurs. That flow creates suction effect in front of the nozzles (6) and sweeps the dirt collected on the fine screen.
The dirty water sucked from the fine screen surface flows through collector pipe (7) and hydraulic turbine (8) and impels a rotary movement of the dirt collector while going off the drainage pipe. At the same time pressure drop in the hydraulic turbine (5) and drainage of piston (10) forces the dirt collector into axial movement. This turning and axial movements together create a helical movement that enables the suction nozzles sweep the entire screen area.

When back-flushing is completed, dirt collector automatically back-flushes, returns to its original position and back-flushing is completed. During back-flushing, filtration continues.

SUPERIOR CHARACTERISTICS OF FILTERNOX® FILTERS

• Completely stainless steel
• Continuous filtration during back-flush
• Filtration in pressurized lines
• Filtration under all temperatures and pressures
• Larger filtration area
• 100% backflush efficiency
• 10-60 seconds back-flush period
• Minimum water consumption for back-flushing
• Easy installation and maintenance
• Operation without supplementary energy
• Negligible head loss
• Non disposable filter elements

Yukarı Dudullu, Nurettin Duman Sk. Kızıltoprak Plaza No: 34
Ümraniye, İstanbul, 34775, Turkey
Phone: +90 216 499 80 01 (pbx)   Fax: +90 216 499 80 09

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