Independently certified to have one of the highest screening capture ratios on the market.
The Great White Shark is an apex predator and rules almost every body of water around the world. Like the shark from which it bears its name, our Great White screen is designed and manufactured at the pinnacle of quality and dominates the competition.
Our Great White screens have been independently certified to have the highest screening capture ratio of all band screens on the market. Dual spray wash, patented grid design, proprietary sealing system and UHMWPE Guide Links make this an exceptional product for the filtering and offloading of water and wastewater screenings.
Very low headlosses and extremely strong, reinforced grids make these center and dual flow screens suitable for a number of applications. The patented sealing system ensures all tolerances are held to 0.5mm – even those that other screens leave vulnerable. The Great White Center Flow Screen is designed to handle low-to-high flows with 0.5-25mm openings and can be incorporated into our Septage Receiving Station.
The Laced Link-style grid is ideally suited for water and wastewater applications where fine screening is required with low headlosses.
The mesh-style grid is ideally suited for water applications where fine screening is required.
Our perforated panel grid is excellent for a variety of municipal water and wastewater applications where fine screening is required to protect sensitive process equipment, such as Membrane Protection (MBRs).
Hydro-Dyne is committed to empowering cities, businesses, and all they serve worldwide in achieving the utmost efficiency from their wastewater treatment equipment. As an industry leader, we’re here to help you make informed decisions that not only protect our environment, but also elevate the quality of life for communities across the globe.
Flow passes into the screen and is diverted through the grid on each side of the unit. The Center Flow design directs water into the screen and exits out the sides while the Dual Flow design directs water from outside of the equipment through the sides for a rear exit.
Solids larger than the openings in the screen’s grid are collected and begin to form a mat which is removed undisturbed from the flow resulting in extremely high solids capture. Screening capture ratios increase as the solids form a thicker mat. Level sensing devices can be connected to variable speed drives to automatically compensate for high solids loading during peak flows or low flow conditions by proportionally speeding or slowing the grid travel speed. This increases the capacity of the equipment when needed and reduces wear, thereby extending the life of the equipment.
Solids are transported to the top of the screen as flow is constantly presented a clean grid surface. As screenings traverse up and over the top of the screen they are discharged into screening handling equipment. Drained wash water is discharged upstream – eliminating bypass.
Minimal friction is achieved through the use of Ultra High Molecular Weight Poly Ethylene (UHMWPE) and stainless steel wear surfaces. Machined Delrin spacers precisely separate elements, eliminating metal-on-metal wear and extending the life of the grid. Wide stainless steel tracks ensure years of trouble-free operation.
The stainless steel foot section and wear tracks prevent solids bypass. Unlike traditional screens, all solids with diameters larger than screen opening sizes cannot pass under, through or over the screen. Even in the event debris is not unloaded by spray wash, it always remains on the “dirty” side of the screen.
Our patented sealing system holds extremely tight tolerances between panels and grid to frame, eliminating the bypass of solids and intrusion of abrasive grit. We can ensure a tight tolerance down to 0.5mm in all locations of the screen, even those areas that other screens leave vulnerable.
The value of this design was tested by an independent national testing facility and was awarded the highest Screening Capture Ratio (SCR) of any bandscreen. Our 6mm screen received an SCR rating of 84% while our 2mm received an SCR rating of 93.25%.
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. Most importantly, no part of the drive touches the grid. Therefore, a bent grid element will not be compounded into a disabled screen.
Features
Our highly effective spray wash is a superior method of cleaning the grid and prohibiting carry-over. Spray nozzles efficiently direct pressurized water over the width of the grid to positively remove all screenings and prevent carry-over. This method of discharge requires a relatively clean source of water to avoid clogging.
Low pressure deluge wash is a good alternative to spray headers if a source of clean water is not available. The deluge washer allows plant effluent or even screened flow to be used. This system also acts as a supply for screenings handling equipment.
Do you have any questions or would you like more information?
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