ROTAMAT ® RoK1/2 Storm Screen
Automatically cleaned screen for installation in CSO’s and Storm Tanks
• Two dimension screening , 100% capture of solids greater than 6mm
• Single low kW drive
• Multiple mounting and discharge arrangements
• Ideally suited to both new build and retrofit applications
• Screen upto 10,000 l/sec with a single screen
• Very low head loss
• Low maintenance requirement
• Over 1200 UK installations
The Situation
During and after storm events large amounts of debris are discharged to streams, rivers and lakes through storm water overflows of combined sewer systems. Frequently, even the installation of scum boards or static screens is insufficient to prevent such pollution. The polluting items, such as sanitary products, toilet paper, faeces, and plastics etc. are not only unsightly but also responsible for considerable cleaning and/or disposal costs. The Solution The ROTAMAT® RoK storm screen is the ideal solution for this task, whether for new structures or for the retrofitting into existing structures. The RoK1 and RoK2 screen are designed for high flow rates at an extremely low hydraulic resistance. Two-dimensional screening guarantees a very high solids retention combined with automatic, gentle cleaning of the perforated plate Screenings are either returned to the continuation flow or can be removed from the flow and handled directly, ideal for overloaded inlet works. The screen is either mounted on the dry side of the weir wall (RoK1) or mounted over the dry weather flow channel (RoK2). The Function Both types of screen are mounted horizontally on the overflow weir. A screw flight is mounted on a half cylinder of perforated plate. As the stormwater flows through the horizontal perforated half-pipe of the screen basket the solids are retained A screw, with a brush attached on its flights, rotates within the semi-circular screen basketr. It cleans the screen and pushes the separated solids gently towards the discharge point of the screen where they are retuned to the wastewater flow. During storm conditions the screen is automatically started and then works fully automatically until the storm subsides.
Key benefits
• Low Investment Costs • Single low kW drive • Low head loss • Full stainless steel construction • No major maintenance for over 5 years on most applications • Quick and easy installation even as a retrofit • No washwater required • Suitable for all types of CSO chambers • Lifting frames for complete removal of screen if required • Control panels designed and built in the UK • Variety of discharge arrangements
Bespoke solutions
Due to the experience gained in offering storm screening solutions since the early 1990’s Huber Technology are able to offer a range of bespoke solutions for all types of chambers and network requirements.
These can range from building the unit is sections for re assembly in a chamber to allow for difficult access to providing a complete solution for screening 30,000 l/sec complete with screenings handling.
The screens are ideally suited for all applications and due to the low maintenance requirements of the screens maintenance is kept to a minimum.
Key to any storm screen solution is to ensure screenings are removed effciently from the screen and to prevent representation which often causes screens to fail. The RoK range of screens have been specifcally designed for use in pumping stations and to ensure flow control devices don’t get blocked with screenings
RoK1 flow diagram
RoK2 flow diagram
5 x RoK1 0o screens incorporating screenings handling for a total flow of 30,000 l/sec and 36m3/hr of screenings handling
Installation Examples Below are examples of several types of RoK installation, please contact us to discuss your requirements
Huber Technology Units C&D, Brunel Park Bumpers Farm Industrial Estate Chippenham, Wiltshire SN14 6NQ
ROTAMAT® Ro K Storm Screen
Tel: 01249 765000 Fax: 01249 449076
e-mail: [email protected] web: www.huber.co.uk
2 x RoK1 0o screens incorporating flow control RoK1 60o degree screen
RoK1 push type screen RoK2 dIscharge area
RoK1 push screen into adjoining chamber RoK1 screen on inlet balance tank
