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Automatic Self Cleaning Strainer

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Uninterrupted Flow with Automatic Self-Cleaning Strainers

The Eliminators®, motorized, automatic self cleaning strainers by Fluid Engineering, provide continuous debris removal from fluid piping systems that demand full time uninterrupted flow.

The Eliminators® are particularly effective in fluid applications where unattended service, high solids loading and/or uninterrupted flow requirements
deem a basket strainer and its attendant maintenance problems impractical. Any of the Fluid Engineering 700 Series Strainers, applied correctly, will prove efficient and cost effective compared to simplex/duplex strainers or other automatic straining systems.

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Straining Element

Wedge Wire Straining Element Cross Section with Adjustable Accelerator Plate
Wedge Wire Straining Element Cross Section with Adjustable Accelerator Plate

The Eliminator® features a revolutionary reverse rolled wedge-wire straining element (Figure. 4) that is extremely rugged and more clog resistant than conventional strainer elements that use perforated plate or wire mesh screens.

This proven state-of-the-art straining media is fabricated by wrapping vertical rods with wedge shaped profile wire. Each intersection of rod and wire is welded to produce an extremely rugged one-piece element. This forms continuous slot that allows only two-point contact with debris particles to reduce clogging.

The wedge shaped profile wire reduces the possibility of retaining debris smaller than the screen opening which historically has been the cause of premature clogging or failure of competitive screen designs.

Operation of the 700 Series Eliminator

For positive pressure applications

  1. Debris laden fluid enters through inlet to inner chamber (Figure 1a).
  2. Dirty fluid flows upward to the strainer element (A).
  3. Debris is retained on the flat face of the strainer element, while stained fluid continues to outer chamber and exits through strainer outlet (See Figure 1a).
  4. During backwash or cleaning cycle, the motor/ gear reducer (B) is engaged and drives the hollow drive shaft (C) and hollow port (D) around the inner circumference of the strainer element.
  5. The backwash assembly C, D, and E are opened to atmospheric pressure by opening the backwash control valve (not shown).
  6. Flow reversal occurs at the port/straining element (F) interface because of the pressure differential described in 5 (See Figure 1b).
  7. Debris is effectively vacuumed from the full length of the straining element by a vigorous reverse fluid flow and into the hollow port; down the hollow drive shaft and out the backwash outlet (G).
  8. The hollow port continues to sweep the full length of the strainer element until the cleaning cycle has ended.
  9. A brush molded to the port shoe facilitates debris removal on the straining element (See Figure 1c). A non-brush port shoe is available as an option.
  10. The strainer will provide continuous uninterrupted fluid flow during the cleaning operation.
  11. The cleaning cycle can be set for continuous or intermittent backwash.

U.S. Patent No. 4,818,402 – Canadian Patent No. 1,314,235

The Hyper-Jet® Model 721/751

For Negative & Low Pressure Applications (such as pump suction)

  1. Debris laden fluid enters through inlet to inner chamber (Figure 3a).
  2. Dirty fluid flows upward to the strainer element (A).
  3. Debris is retained on the flat face of the strainer element, while strained fluid continues to outer chamber and exits through strainer outlet (See Figure 3a).
  4. During backwash or cleaning cycle, the motor/ gear reducer (B) is engaged and drives the hollow drive shaft (C) and hollow port (D) around the inner circumference of the strainer element.
  5. The backwash assembly (C), (D), and (E) are opened to atmospheric pressure by opening the backwash control valve (Not shown).
  6. The external source of fluid is introduced by opening the control valve (Not shown) connecting the spray nozzles (J) at the leading edge (F) of the backwash assembly.
  7. A “Jet” spray action occurs at the straining element inside surface (See Figure 3b) in addition to the flow reversal at the port/ straining element inter-face (H).
  8. Debris is effectively removed from the full length of the straining element by a vigorous Hyper-Jet® fluid flow into the hollow port; down the hollow drive shaft and out the backwash outlet (G).
  9. A brush molded to the port shoe facilitates debris removal on the straining element (See Figure 3c). A non-brush port shoe is available as an option.
  10. The hollow port continues to sweep the strainer element until the cleaning cycle has ended.
  11. The strainer will provide continuous uninterrupted fluid flow during the cleaning operation.
  12. The cleaning cycle can be set for continuous or intermittent backwash.

US Patent No. 5,152,891

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