Amiad Filtration Systems Ltd.

- Model IV - Automatic Filters



The Amiad Omega Series are automatic filters, with multiple screens operated by a common electric driven screen cleaning mechanism. The “Omega” filter flow rate range is up to 5,000 m³/h (22,000 gpm) and from 10-500 micron filtration degree. Inlet/Outlet flanged connections are available in the range of 200-800 mm (8”-32”).

The Filtration Process
Raw water enters from the filter inlet and passes through the multi-screens. Filtered 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
Cleaning of the filter is carried out by multiple suction scanners with an option for SLN (Spring Loaded Nozzles) which simultaneously scan the multi-screens by a common electric motor driven gear mechanism. The DP switch signals to open the exhaust valves creating a high velocity suction stream at the nozzle scanner tips which “vacuums” the filter cake from the multi screens.
During the self-cleaning process, which takes approximately 25 seconds, filtered water continues to flow downstream.
The Control System
The Omega’s operation and cleaning cycle is controlled and monitored by a Programmable Logic Control (PLC).
The PLC allows maximum flexibility in control options and is provided with a wide range of control options from
an independent stand alone controller to a fully integrated one with the customer’s central control system. During the
self-cleaning cycle the PLC controls a solenoid that operates the exhaust valves by means of a hydraulic command or compressed air.
The self-cleaning cycle begins under any one of the following conditions:
  1. Receiving a signal from the Pressure Differential Switch
  2. Time interval parameter set at the control board
  3. Manual Start
The control board also provides:
  • Optional continuous flush mode
  • Flush cycles counter
  • Alarm output – may be used to open a bypass, shut-off a pump, etc.
Omega Models:
Amiad’s Omega product line consists of the following models:
  • Omega I Standard 13,500 cm2 (2,100 in2) & Enlarged (E) 18,000 cm2 (2,800 in2)
  • Omega II Standard 27,000 cm2 (4,185 in2) & Enlarged (E) 36,000 cm2 (5,600 in2)
  • Omega III Standard 54,000 cm2 (8,400 in2) & Enlarged (E) 72,000 cm2 (11,200 in2)
  • Omega IV Standard 81,000 cm2 (12,600 in2) & Enlarged (E) 108,000 cm2 (16,700 in2)

  • Based on Amiad’s proven suction scanning screen filtration technology
  • Highly efficient self-cleaning mechanism; fine filtration performances, down to 10 micron
  • Small footprint
  • Exceptionally high filtration area & flow per unit
    ASME / ATEX / IECEX, available on request
  • Applications: Membrane Protection, Municipal Water, Industrial Water, Oil&Gas and Irrigation

General Data
Maximum flowrate Omega IV - 4050 m³/h (17,830 gpm)
Omega IV E - 5250 m³/h (23,120 gpm)
Inlet/Outlet diameter Omega IV, Omega IV E - 450 - 800 mm (18”- 32”)
Flange standards as per request
Minimum working pressure** Omega IV, Omega IV E - 2 bar (30 psi)
Maximum working pressure Omega IV, Omega IV E - 10 bar (150 psi), 16 bar (230 psi) upon request
Filtation area Omega IV - 81,000 cm2(12,600 in2)
Omega IV E - 108,000 cm2(16,700 in2)
Weight [empty] Omega IV - 3250 kg (7165 lb)
Omega IV E - 3435 kg (7573 lb)

Flushing Data
Exhaust valve Omega IV - 3x4”
Omega IV E - 3x6”
Flushing cycle time Omega IV - 3x25 sec
Omega IV E - 3x25 sec
Reject water volume per flush cycle Omega IV - 3x480 liter (3x127 galIon)
Omega IV E - 3x560 liter (3x148 galIon)
Minimum flow for flushing Omega IV - 3x70 m³/h (3x308 gpm)
Omega IV E - 3x80 m³/h (3x352 gpm)

Construction Materials*
Filter housing Carbon steel, epoxy coating inside & outside
Filter lid Carbon steel, epoxy coating inside & outside
Screen Weavewire 316L screens or molded reinforced PP with 316L screen
Cleaning mechanism Stainless steel 316L
Exhaust valve Epoxy-coated cast iron, natural rubber or EPDM
Seals Synthetic rubber, NBR
Control Stainless steel, nylon

Control and Electricity
Electric motor 0.75 kW (1Hp)
Rated operation voltage 3 phase, 220/380/440 VAC 50/60 Hz
Current consumption 2.1 Amp
Control voltage 24 VAC or DC

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