Contra-Shear Wastewater Screening Products.pdf - Johnson Screens

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headworks solutionsJohnson Screens provides screening solutions for a wide range ofapplications across various industries. With our Contra-Shear ®product line, we offer even more products and capabilities forwater and waste water treatment.Our HeadWorks solutions provide acomplete range of products suitable forcoarse and fine screening applications.Johnson Screens, through its extensivesales and service network, is committedto offering its customers the bestscreening solution in the market place.The Automatic raked barscreenOffers a low-maintenance, vertical, cabledrivendesign that can be retrofitted intoexisting channels.contra-shear milliscreenThe original Vee-Wire drum screen,manufactured for more than 30 years, isthe industry standard for above channel,rotary fine screening with more than15,000 installations worldwide.contra-shear suboscreen ®This unique, in-channel screen is capableof handling large flow rates at a low andconsistent headloss.centre-flo screenThis travelling band screen has a modulardesign and is custom built to fit narrowand deep channels.With screening surfaces made from thetraditional Johnson Vee-Wire ® screens,perforated plate or wire mesh, ourscreening products are sure to suit theneeds of any customer.screenmat step screen andscreen compactorProduces cost effective, in-channelsolutions for small to medium size plants.Inclined rotary screenUsed for screening and solids extractionin a fully enclosed, single compact unit.the package treatmentplantCombines screening, compaction, gritand grease removal into a compact, readyto install unit.Stainless steel Vee-WireWire MeshPerforated Plate
AutomaticRaked Bar ScreenLow-maintenance verticaldesignThe Johnson Screens automatic rakedbar screen is a vertical, cable drivencoarse screen suitable for screeningsewage or raw water.The automatic raked bar screen istypically installed in a pumping station orthe inlet of sewage or water treatmentplants. The submerged section in contactwith the influent is a series of parallelbars that make up a fixed bar screen.As the influent flows through the parallelbars, it retains solids greater than the barspacing.The retained solids are extracted bymeans of a cable-driven raking systemthat lifts the solids outside the channeland discharges them into a hopper. Onone side of the raking system is a bucketwith the teeth, which is supported bythree cables and is activated by thewater level differential in the channel.The automatic raked bar screen isavailable in effective widths from 3.2 to20 ft (1 to 6 m) and channel depths from16.4 to 66 ft (5 to 20 m).Features and Benefits• Typical bar spacing from 1 to 4 in. (25 to 100 mm)• Robust yet simple cable-driven operation• 304SS or 316SS construction• Heavy-duty construction• No chains or sprockets, which are prone to clogging and failure• Vertical design saves on space and can be retrofitted into existing channels.• Hydraulic self-tightening system for cables.• All maintenance conducted outside the channel and above the deck.• Maintains a clean screen surface and low head loss.• Fully automatic operation.
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Contra-Shear Wastewater Screening Products.pdf - Johnson Screens

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