Tiger Shark
Multi-Rake Screens

Practical design and efficient operation.



  • Heavy duty multi-rake bar rack screen

Grid Opening Range

  • 5-300mm

Grid Types

  • Rake


  • Replaceable scraper bar

Jam Protection

  • Auto-reverse and clear
Particle Removal
  • Up to 18” (450mm)
Stainless Steel
  • T304
  • T316
  • Super Duplex
  • High nickel stainless steels


The Tiger Shark is differentiated by its dark stripes, or bars, down its body and is noted for having one of the widest food spectrums of all sharks, consuming a variety of prey. This is a very fitting representative for our Multi-Rake Screen. With its iconic heavy duty stainless steel bar rakes, the Tiger Shark Multi-Rake Screen efficiently captures a wide variety of debris and is ideal for large particle removal.


The Tiger Shark screen’s practical design combines reliability with efficient operation. The low friction UHMWPE guide links reduce wear and operational costs. The Tiger Shark is designed for large particle removal. Multiple rakes continuously clean the bar rack with grid openings from 5-300mm.

Features & Benefits

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Municipal Wastewater


  • Combined Storm Overflow
  • Comminutor and grinder replacement
  • Package Plant Primary Treatment
  • Pump and Lift Stations
  • Treatment Plant Headworks and Intake

Municipal Water

  • Drainage Canals
  • Raw Water Intake
  • Stormwater

Industrial Wastewater


  • Chemical Processing
  • Food & Beverage
  • Manufacturing
  • Meat and Poultry Processing
  • Mining
  • Petroleum
  • Pulp and Paper
  • Textile Mills

Industrial Process

  • Cooling Water Intake – Power Generation
  • Fish Farming
  • Irrigation System Protection
  • Petroleum Refinery
  • Raw Water Intake – Potable Water
  • Uranium Refinery

Screen Grid Options

Stainless Steel Bars
Openings from 5-300mm


  • Extremely strong grid
  • Dry unloading of screenings
  • Wide range of opening sizes
  • Versatile and proven
  • Easily handles large flows


  • Municipal water and wastewater
  • Combined storm overflow
  • Pump and lift systems
  • Food processing


  • Less efficient capture of hair and fibrous material
  • Lower screening capture ratio
  • Large solids can jam bottom and if reversing cannot clear, they must manually be removed

Theory of Operation

Flow passes through the screen while solids are intercepted and collected by a series of vertical stationary bars with uniform spacing to form a bar rack. As flow passes through the bar rack, solids larger than the openings accumulate until they are cleared by a series of stainless steel rakes traveling around a guided path.

Solids are removed from the waste stream and are conveyed to the top of the screen where they are unloaded via a wiper blade. The discharged screenings are then disposed of in a container or further processed by screening handling equipment.

All stainless steel foot assembly prevents solids from bypassing under the screen and proprietary sealing system keeps grit and rags away from the chain and wear tracks. Minimal friction is achieved through the use of Ultra High Molecular Weight Poly-Ethylene (UHMWPE) and stainless steel wear surfaces reducing power requirements and maintenance. Wide stainless steel wear tracks ensure years of trouble-free operation.


Our patented sealing system holds extremely tight tolerances between the grid and frame, eliminating the intrusion of abrasive grit. We can ensure a tight tolerance down to 0.5mm in all locations on the screen, even those areas that other screens leave vulnerable.


  • Guide Links create a continuous chain around edge of selected grid
  • Formed stainless steel plate creates a labyrinth seal with Guide Link slot
  • Fully adjustable and removable for inspection
  • Continuously sealed for entire submerged grid path


Patented direct drives efficiently power the screen. Stainless steel sprockets support and pull the black UHMWPE Guide Links, resulting in little-to-no friction and long wear.


Electric Drive

Resilience to weather, wear, and lack of maintenance make this model an excellent choice for virtually every installation. Through sensible design and material selection this headworks screen is very efficient, utilizing as low as a 0.5 hp (0.38 kW) electric motor. Screens will be wired to suit applications phase and voltage supplies. Chain guards are standard on all electrical models. Explosion proof motors are optional.


Hydraulic Drive

The hydraulic drive incorporates all the benefits of the electric drive with the added capability to be operated submerged. This is a useful option when flooding can occur and reliability is key.


  • Solid stainless steel sprockets and drive shaft
  • Lifts and supports chain and rakes
  • Minimum four lugs engaged per sprocket
  • Adjusts to tension grid to extend wear life of screen
  • Low friction guide links
  • Fractional hp and kW requirements
  • Only two grease fittings per screen
  • Direct drive uses no chains or sprockets

Screenings Discharge

Efficient dry removal is achieved with a replaceable scraper bar. As solids are lifted up onto rakes, large solids roll off the back of the rakes after they pass the screen’s dead plate. Smaller solids and rags that stick to the rake are cleaned by a balanced scraper bar. The bar provides efficient cleaning of rakes and adequate clearance for large solids and reversing operation of the screen.

Screenings Handling

An effective screenings handling system is a critical component to every water or wastewater treatment plant. Hydro-Dyne’s turn-key screenings handling solutions are manufactured at the highest level of quality and designed to accept, wash, dewater, compact and/or transport collected screenings. In wastewater applications, screening handling systems are particularly important as they are designed to return organic material to the channel and produce clean, dry and inorganic product that can be properly disposed of in either a container or bagging unit.

Screening Handling At-A-Glance

  • Collect and convey screenings for disposal
  • Returns organics and wash water to channel
  • Screenings meet strict landfill requirements
  • Compactors reduce disposal weight and volume
  • Bagging units can contain odor
  • Agitation can be introduced for more thorough cleaning
  • Can be designed as integral and external models
  • Shafted and shaftless screw flights

Whitetip Shark Washing Compactor

  • Collects, conveys and compacts screenings for disposal
  • Dewatering and conditioning
  • Returns most organics and wash water to channel

Thresher Shark Washing Machine

  • Extremely thorough washing removes virtually all fecal material and produces “clean” and compacted screenings for disposal
  • High capture of inorganic solids reduces plant operating costs and improves sludge quality
  • Organic material returned to plant for biologic treatment

Spinner Shark Screw Conveyor

  • Collects and conveys screenings for disposal


  • T304, T316 and specialty stainless steel construction
  • 60-90 degree angle options
  • Rake spacing increments of 16” (400mm) beginning at 32” (812mm)
  • Cold weather/freeze protection
  • Reversing sequence provides jam protection and clears obstructions
  • Controls are offered from basic operation to sophisticated automation
  • Electric, hydraulic or explosion proof drives
  • Sectional screens for field assembly in confined spaces

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