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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Automatic jam protection
Dry unloading scraper bar
No submerged sprockets, bushings or bearings
Uninterrupted seal between rake chain and frame held to <0.5mm tolerance
Fully supported UHMWPE Guide Links
Secured to top of channel only to easily pivot
Heavy duty dead plate
All maintenance above channel
Single-piece or sectional frame construction
All T304, T316 or Super Duplex stainless steel construction
60-90 degree installation options
Low profile bottom shoe
Fully enclosed above channel
Low power direct drive
Neoprene channel seals
Bar rack elements collect solids larger than openings and are individually replaceable in channel, allowing opening changes in-situ. Heavy duty construction designed for high differential head.
Rakes continuously clean bar rack and do not drag on grid or dead plate. Multiple rakes more frequently clean accumulated screenings allowing for increased flows and lower headlosses. Rakes are replaceable in-situ for easy repair or opening size change.
Automatic jam protection senses an obstruction and reverses to clear blockage.
Dry unloading via replaceable scraper bar does not require brushes or spray wash.
No submerged sprockets and bearings below the waterline eliminates ragging commonly associated with other screen designs and the need for required maintenance in the channel. If after years of operation wear tracks need replacement they can be bolted in the field.
Proprietary sealing system eliminates ragging on chain commonly associated with most screen designs. Tight tolerance seals also provide excellent protection against grit intrusion which significantly prolongs the life of the equipment.
Proprietary high density, low friction drive chain efficiently directs grid around screen with no maintenance, even in abrasive and high grit applications. Full support of Guide Links means rakes do not drag on screen, significantly improving the wear life of the rakes as well as the grid and dead plate.
The screen is not anchored to the channel walls or floor, allowing it to pivot for easy flow bypass or inspection. Connection to top of channel allows for direct retrofit in existing channels without dewatering or taking them offline.
Heavy duty dead plate for high screening lifts and long life.
Easy access to all routine maintenance and grid points means never having to isolate or dewater channels for confined space entry.
Allows for easy installation regardless of available overhead clearance.
High quality, corrosion resistant materials are standard for use in the harshest environments. All materials are stainless steel including fabricated drive components and all hardware is coated with anti-seize to aid in maintenance.
Available in inclinations from 60 to 90 degrees to suit custom applications.
Low profile bottom shoe limits grit build-up and improves hydraulic efficiency.
Significantly improves safety, odor control and aesthetics for indoor and outdoor operation.
Provides reliable and efficient operation under all conditions with stainless steel, inverter duty, explosion-proof and hydraulic drive options that do not directly contact screening surface. Fractional hp and kW drives are standard on even the largest screens.
Access panels are easy to remove and completely sealed. All routine maintenance is above channel which allows for easy inspection and maintenance without special tools or access platforms.
Eliminates need to anchor to channel and compensates for irregularities in channel construction.
- Combined Storm Overflow
- Comminutor and grinder replacement
- Package Plant Primary Treatment
- Pump and Lift Stations
- Treatment Plant Headworks and Intake
- Drainage Canals
- Raw Water Intake
- Chemical Processing
- Food & Beverage
- Meat and Poultry Processing
- Pulp and Paper
- Textile Mills
- 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.
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.
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
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.
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
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