Metso Screen Filters, Omega Series

Screen Filters, Omega Series

Metso Screen Omega Series filters are large, self-cleaning automatic filters for fine filtration. The simple and robust construction with suction scanning mechanism and a multi-screen design make them perfect for filtering high-flow and poor quality water to very fine filtration degrees down to 10 micron. Available with inlet/outlet diameters of DN100 to DN500 (4”-20”) and supporting flow rates up to 2,200 m³/h (9,700 gpm) they are ideal for a wide range of applications.
  • Automatic flushing according to pressure differential and/or time
  • Flushing does not interrupt downstream flow
  • Fits to restricted spaces with a small footprint
  • Exceptionally high filtration area and flow per unit
Outotec Screen Filters Omega Series

The filtering process

Raw water enters from the filter inlet and passes through the multi-screens. Clean water flows through the filter outlet. The gradual dirt buildup on the inner multi-screen’s surface causes a filter cake to develop, with a corresponding increase in the pressure differential across the multi-screens. A pressure differential switch senses the pressure differential and when it reaches a pre-set value, the self-cleaning process begins.

The self-cleaning process

Once self-cleaning cycle is initiated, the exhaust valve opens, creating a high velocity suction force at the scanner nozzle tips which hydraulically vacuum the filter cake from screen’s surface. The multiple spring loaded nozzles simultaneously scan the screens in a helical path by a two-way reversing motorized drive transmission. During the self-cleaning process, which takes approximately 25 seconds, filtered water continues to flow downstream.

The control system

The filter operation and cleaning cycles are controlled and monitored using a programmable logic controller (PLC). The PLC allows maximum flexibility in control options and has many control options from a stand-alone to a fully integrated controller connected to the customer’s central control system.

The self-cleaning cycle begins under any one of the following conditions:

  1. Flushing by pressure differential

  2. DP analog or digital signal

  3. Flushing by time intervals

  4. Continuous flushing - regardless of DP or time

  5. Remote or local manual start

The PLC also provides:

  • Flush-cycle counter
  • Cause of flushing statistics
  • Faults and alarms, reaction and messages

Models

Screen filters Omega series consists of the following models:

  • Omega 4.5K for up to 180 m3/h (800 gpm)
  • Omega 6K for up to 240 m3/h (1,100 gpm)
  • Omega 13.5K for up to 550 m3/h (2,400 gpm)
  • Omega 18K for up to 750 m3/h (3,300 gpm)
  • Omega 27K for up to 1,100 m3/h (4800 gpm)
  • Omega 36K for up to 1,500 m3/h (6,600 gpm)
  • Omega 54K for up to 2,250 m3/h (9,900 gpm)
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