Back Rake Vertical Bar Screen

Principle of Operation

Back Rake Vertical Bar Screen. All cleaning operations are carried out at the filtered side of the bar screen. This principle allows the bar screen to successfully deal with large amounts of rubbish and dirt. Cleaning is done easily and smoothly while no foreign dirt elements are stuck in the process with no mechanical damage nor wear to the bar screen itself. A massive vertical rods screen is installed at the bottom of the gutter funnel and automatically filters all rubbish and flowing solids out of the operating system.
An automatic sweeping system sweeps down the screen and point it to the collection container. The sweeping system is attached to lifting cables which are spooling on drums at the top of bar screen. A massive frame of profiles exceeding 120 mm is used as tracks the move the sweeping system. Bar screen is designed to operate with a minimum number of moving parts.
A programmable controller controls the operation of the facility and allows adjustment of the operations depending on water and dirt flow. Another possibility is operation by level control.
System can be built in a number of construction materials on demand (stainless steel 304/316 and galvanized steel).


  • The most simple and convenient for operation and maintenance
  • A massive structure that will operation for many years
  • Space Saving due to 90 ° installation angle
  • No moving parts such as gears or bearing chains in the wet area
  • All rake operation is carried out at the bottom of the screen – very law number of failures
  • Easily handles large amounts of rubbish, for example after heavy rain events or sewage system malfunctions
  • A large number of installations with proven success and experience
  • Made in Israel. All spare parts are available on demand
  • Flexibility in design and building materials
  • Skilled service team 24/7

Initial Planning Requirements:

  • Planning the civil engineering section of the canal where the bar screen should be
  • Canal's depth and width.
  • Bar Screen's structure height
  • Sewage removal (with or without compression, removal tank type).



  • Canal width – 500-2000 mm
  • Screen height – up to 1500 mm
  • Screen structure – Flat 8 x 80 mm
  • Filter margin – 10-25 mm
  • Installation depth – unlimited
מגוב מכני אנכי בניקוי אחורי

Construction materials

  • Rail and construction – galvanized steel / Stainless Steel 304/316
  • Screen and Rake – galvanized steel / Stainless Steel 304/316
  • Funnel, serrated wiper, protective sheets, – Stainless Steel 304/316
  • Screws, Bolts and related accessories – Stainless Steel 304/316
  • Axis – Stainless Steel 416
  • Leading wheels – PE 300 + bronze bearing slide
  • Slides – TEACAMID 66 + molybdenum
  • Lifting cables – galvanized steel / stainless steel 316 diameter 8.4 mm
  • Drive system – double helix spindle hollow gear delivery ratio 1: 280 brake motor 3 Phase 1.5 hp I.P 55
  • Command system – reinforced polyester electrical panel I.P 65 with a programmable controller MITSUBISHI FX1N 24MR-ES
  • Inductive switches 30 mm diameter waterproof IP67.


Treatment surface

  • Frame + Railings – galvanized steel / stainless steel 304/316
  • treading floor – reinforced polyester
  • Standard aluminium ladder

Mode of Operations

The rake starts at the top of bar screen. Upon receiving a command from the cycle timer the rake decreases and the sweeper folds back to its location. When the rake reaches the Screen at the bottom it automatically stops, the sweeper opens up and integrates with the Screen. After several seconds the rake automatically moves back up.
When the rake reaches the top of the bar screen the squeegee removes the rubbish that falls through the funnel into the dumpster.
The end of the cycle as the rake rises up, is determined by a switch that is located at the top of the rails.
The Cycle timer starts counting the time until the beginning of the next cycle.
The working cycle can be controlled manually depending on fluid flows and the amount of rubbish.

User Maintenance

  • Weekly care – General inspection. Wash the mop. Remove dirt and rags from the cables, funnel and rake
  • Monthly treatment – Grease rails and cables Semi-annual Treatment Reinforce all bolts, check cables, Grease system bearings, wiper, funnel, and axis.
  • Check transmission fluid gear.
  • Transmission is filled with a synthetic oil gear.
  • First oil change after 5 years.
  • Synthetic oil Viscosity VG 320
LD Systems

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