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[...]Gessen, Germany When membrane technology solutions appeared on the market for the treatment of municipal wastewater, the requirements on mechanical wastewater treatment systems changed fundamentally. Conventional screens with their bar spacings or perforations of 6 to 10 mm were no longer sufficient for the membrane bioreactors used today. The efficiency of one-dimensional screens such as wedge wire screens, especially the removal of hairs and fibres, turned out to be insufficient to guarantee the safe operation of membrane plants. It became necessary to develop a new type of two-dimensional mesh or perforated plate screen to improve the retention of fibres and hairs. As the apertures of the screen’s mesh or perforated plate are defined in two dimensions, the screen is able to ensure the maximum retention of hairs and fibres. On the basis of the worldwide known and well-proven system of HUBER ROTAMAT® fine screens with screening bars we developed the ultra-fine ROTAMAT® Perforated Plate Screen RPPS with perforated plate. This screen relies on the unique system of HUBER ROTAMAT® machines which combines screening, washing, transport, compaction and dewatering in a single unit. Screens with apertures ≤ 1.0 mm are primarily equipped with a mesh as this offers a very large free surface. Perforated plate is used for most screens with apertures ≥ 2 mm. HUBER ROTMAT® Perforated Plate Screens RPPS are equipped with perforations from 2 to 6 mm. The selection of the mesh size or perforation depends on to what extent hairs and fibres must be removed to meet the specific requirements of the type of membrane system used (whether hollow fibre modules fixed on one or both sides, or plate modules). Experience has shown that especially hollow fibre modules need a high removal of hairs and fibres to maintain reliable operation. As plate modules are less sensitive to blocking due to their plane surfaces, pre-screening with a ROTAMAT® Perforated Plate Screen RPPS with 3.0 mm perforation is sufficient in most cases. Two-dimensional mesh or perforated plate screens achieve a high removal of hairs and fibres, i.e. two to four times the amount of solids are removed than one-dimensional screens are able to separate. The significantly increased separation efficiency is accompanied by a high level of screen surface blinding and requires larger dimensioning of the fine screens compared to other commonly known screens. The channel system should be operated in a way to ensure that washing and load peaks are avoided as far as possible. The screenings separated by the fine screen can either be dewatered and discharged into a container or passed on to the sludge treatment system. As fine screenings contain much more sludge and fine particles (silt) compared to coarse screenings, fine screens must be designed to meet the increased requirements of wear resistance and screenings dewatering. If the screenings separated by fine screens are not directly dewatered but passed on to the sludge treatment system, the fine screen can be designed to provide for the possibility to pump the screenings into the sludge storage tank. Fine screenings in the sludge treatment system enhance the dewatering process due to the structural material contained within fine screenings. Improved dewatering results are achieved with even a lower specific polymer consumption compared to dewatering without fine screenings. Without any exaggeration, we can say that HUBER is a leading supplier in the field of pre-screening for membrane plants. Since 2004, we have installed more than 160 fine screens upstream of membrane plants, almost 50% of them with a screen basket diameter bigger than two metres! The extensive experience gathered from real size installations is reflected in the continuous development and optimisation of our fine screens.[...]

[...]We are now looking to fill this position and for the right candidate to be based within a commutable distance to Rotherham. HUBER Technology is an ‘Investors in People’ Gold company which specialises in environmental engineering throughout the world, and with a UK operation based in Chippenham focused on delivering wastewater treatment solutions for the UK water industry. Reporting to the Regional Field Manager, the right candidate will be part of a small team responsible for servicing, installation and troubleshooting of HUBER machinery. The role requires a skilled experienced Mechanical Fitter/Technician, who is used to working from Mechanical engineering drawings ideally from a site M & E, plant maintenance or metal fabrication background. This role involves predominately site work and a company van will be provided for travel (shared with one other colleague). Travel includes the Northern Regions of the UK, from time to time you may be required to work in other parts of the UK. Working Hours & Overtime This is a Monday to Friday role with door-to-door pay , meaning you're paid from the time you leave home until you return. Regular overtime is available, typically ranging from 6 to 10 hours per week , with opportunities to earn even more depending on site locations and travel requirements. Your core responsibilities are as follows: You will carry out site visits to undertake inspections or mechanical service/ fitting work. Ensure that respective site work is carried out to a satisfactory standard and that all issues arising during the site work are dealt with immediately and in a professional manner. You will manage the relationship with the client on site. You will create site reports on completion of site work. You will maximise time on site by liaising with the Regional Field Manager and internal colleagues to ensure any technical or site issues have been discussed and work is completed satisfactory. Work closely with suppliers and sub-contractors. You will enjoy the hands-on aspect of the role and actively participate in site as well as job preparation work. Your profile: You ideally will have completed an apprentice scheme or an NVQ minimum Level 2 or equivalent in an Engineering discipline and you will have a minimum of four years’ experience. You enjoy working with a variety of people and are confident to build relationships with clients and suppliers. You have ideally worked previously on site or you have strong aspirations to move into a field based role. You will be an advocate for health & safety, working safely at all times. The ability to weld, ideally you have TIG welding experience. You need to be conversant with Microsoft office. You are eligible to work in the UK. In addition you will have a flexible attitude towards handling the different aspects of the role. As the right candidate you will be self-motivated, customer focused, team orientated, reliable with a strong sense of problem solving and ownership and be able to demonstrate initiative. A clean driving licence is vital to the role as well as willingness to travel. We offer an interesting role that provides ownership, a competitive salary and benefits package as well as sound development opportunities. If you are interested please send your CV (as a pdf document) with a covering e-mail to hr@huber.co.uk[...]

[...]Mechanical Preliminary Treatment Removal of foreign matter from raw wastewater and sludge Good mechanical pre-treatment protects the subsequent process stages from clogging, blockages, deposits and abrasion. Good mechanical pre-treatment protects the subsequent process stages from clogging, blockages, deposits and abrasion. Solids Separation with Screens and Fine Screens The separation of solids from wastewater with screens is the first step in municipal and industrial wastewater treatment. HUBER has developed a wide range of different screens, fine and ultra-fine screening plants which are in use thousands of times worldwide. Screenings Treatment Wash presses are the optimum solution for the treatment of screenings. By adding washing water and mechanical energy, faeces and suspendable organic matter are washed out and dewatered. Weight reduction also decreases screenings disposal costs. Grit and Fat Removal For reasons of the operational safety of wastewater treatment plants, it is necessary to remove the grit contained in the wastewater. HUBER offers different types of grit traps for this purpose, which can separate grit, fine grit as well as grease. Treatment of Grit from Sewage Treatment Plants Grit washing has become an established process for the treatment of grit from grit chambers over the last decades. HUBER grit washing plants have been in operation worldwide for more than 25 years and have set the standard for modern and efficient processing of grit from wastewater treatment plants to produce a valuable product for reuse. Replacement for Primary Settling Tanks The HUBER CarbonWin® process replaces the primary clarifier with a fine screen. With the same separation efficiency, only 10% of the area is required compared to a primary settlement tank. Removal of foreign, disturbing materials and solids from wastewater Mechanical preliminary treatment is a prerequisite for reliable, low-wear and low-maintenance operation of the entire wastewater treatment plant. With mechanical wastewater treatment, foreign matter and solids in the wastewater are removed by screens and fine screening systems as well as through sedimentation and separation processes. The removed materials such as screenings, grit or primary sludge are fed to subsequent treatment stages. As experts with decades of worldwide experience, we have the optimal solution for every mechanical pre-treatment task: Solids separation with screens and fine screening systems Screenings treatment Grit and grease separation Grit washing Replacement for primary settlement tank FAQ Frequently Asked Questions What is the first stage of wastewater treatment? The first stage of wastewater treatment is the mechanical treatment stage, also known as mechanical pre-treatment or mechanical wastewater treatment. Here, mechanical processes are applied to remove pollutants from the wastewater. The following machines, plants and structures are used in these mechanical processes: Screens for the separation of organic and inorganic larger solids Grit chambers for the separation of grit and mineral substances Sedimentation tanks, so-called primary clarifiers, for the separation of finer solid wastewater components or, alternatively, special screening machines replacing the primary clarifier, such as the HUBER Drum Screen LIQUID . Why is mechanical pre-treatment of wastewater important? Wastewater to be treated in a municipal wastewater treatment plant contains a variety of substances, which may be present in dissolved or undissolved form. The undissolved substances, i.e. the solids, can be organic or inorganic. The size of the solids also varies greatly, as wastewater not only contains small solids such as sand, but can also contain solids very large in size. Everything that can enter a sewer system will eventually end up at the sewage treatment plant. The mechanical treatment stage therefore has the task, as the first stage of wastewater treatment, to remove these solids, as they would interfere with or hinder the second stage of wastewater treatment, the biological stage. What is the cleaning capacity of mechanical pre-treatment? Mechanical wastewater treatment can remove about 30% of the pollutants in wastewater. At first, screens remove mainly larger solids such as plastic parts, hygiene articles, stones, etc. The subsequent grit chamber separates grit, which is always present in municipal wastewater. The primary clarifier, either in the form of a primary settlement tank or a mechanical screening system, then separates finer solid organic and also inorganic wastewater pollutants. Videos Video: Complete wastewater treatment at the Øygarden WWTP in Norway Video: Mechanical preliminary wastewater treatment Video: Mechanical preliminary wastewater treatment at a municipal WWTP Video: Complete wastewater treatment at the Øygarden WWTP in Norway Pointing-the-way, highly efficient wastewater treatment with HUBER Technology - one of the most modern wastewater treatment plants in Norway Video: Mechanical preliminary wastewater treatment Example: municipal WWTP Weiden, Germany Video: Mechanical preliminary wastewater treatment at a municipal WWTP Example: WWTP Zwickau, Germany[...]

[...]Complete solutions for the specific wastewater problems of the meat processing industry Reduce disposal costs Separate solids and contaminants Dewater surplus and flotate sludge Separate biomass Comply with limit values Reduce operating costs Utilise wastewater heat We offer proven and individual complete solutions for the specific wastewater problems of the meat processing industry: for slaughterhouses and meat processing of cattle, pigs and poultry, as well as for slaughterhouse waste recycling plants. High solid loads and COD values as well as grease are typical for wastewater from the meat processing industry. We have safe and proven solutions to significantly reduce the loads on site and to minimise odour nuisance. So even low limit values can be safely complied with and the treated wastewater can usually be discharged into the sewage system or even directly into water body. HUBER products and solutions for your requirements Wastewater from cattle truck washing contains high concentrations of solids loads and grit. We use our reliable HUBER Micro Strainer ROTAMAT® Ro9 to remove such coarse material. Rumen contents from slaughtering can be dewatered with our coarse solids compactor and thus reduced to less than half of the original volume. Production wastewater in slaughterhouses typically shows high contents of blood, grease and meat residues. These are separated by our robust HUBER screening systems ROTAMAT® or HUBER Multi-Rake Bar Screen RakeMax® , which have proven their efficiency in thousands of applications. HUBER Dissolved Air Flotation Plants HDF are available to completely remove grease and solids and reduce COD. To achieve the lowest possible operating costs for the flotation process, it is recommended to integrate the HUBER Chemicals Dosing DIGIT-DOSE . The clear effluent from the flotation plant can be discharged to the sewer or passed on to additional biological treatment. The resulting residuals are thickened with HUBER Sludge Thickeners , thus saving transport and disposal costs. An even further volume reduction is achieved with HUBER Screw Presses . With the HUBER Heat Exchanger RoWin , high wastewater temperatures can be reduced and heat recovered for process or heating purposes. The numerous projects we have successfully executed in the meat processing industry and related branches, combined with our many years of experience in wastewater treatment, guarantee the reliable and efficient operation of your wastewater and residue treatment system! Our solutions for your challenges: COD, fat and solids reduction Reliably comply with discharge limits Reduce operating costs for wastewater treatment Reduce disposal costs for waste and sludge Recover wastewater heat and reduce wastewater temperature Access solutions for manholes and tank[...]

[...]Meadowhead, UK Quotes Jim Gordon, Project Manager Scottish Water : “ The Meadowhead Inlet Refurbishment was a very challenging project on a number levels including a very tight timescale. Key to the success of delivering this on time was an effective and efficient working relationship between Huber, SW Managed Delivery, SW Operations and the main contractor with all parties meeting their respective project commitments on or ahead of schedule. Huber as the principal supplier and installer of screens and screening handling kit had a key role to play in meeting the aspiration of the delivery team to better the agreed programme and have all screening equipment installed and operational by Christmas 2014 rather than March 2015. This was achieved with Huber’s in house, highly experienced staff working in a flexible, responsive and effective manner with all the other parties involved to deliver a first class job ahead of schedule. ” Kelly Nightingale, HUBER Contracts engineer commented: “ Although this was a challenging project from the offset, the end result proved very rewarding, achieved through close working and collaboration by all parties involved, the outcome being a successfully, maintainable solution. ” Fred Neumann, HUBER Area Sales Manager: “ The success of this project was down to all the associated stakeholders being involved early in the project design and execution. Everyone involved, adopted a very professional, flexible approach and can do attitude, which resulted in a very good installation on the ground for all to see. Personally, I would have no problems undertaking future projects with such a hands-on end user / Project manager and contractor involvement. ” HUBER Technology UK has completed the upgrade of the inlet works at Meadowhead STW. The project involved the installation of 4-off HUBER RakeMax® Multi-Rake Bar Screen 6300/2752/19 Coarse Screens and 2-off 12 m³/hr HUBER WAP-L Wash Press Screening Handling units for the Coarse Screens and 2-off 15 m³/hr WAP-L Wash Press Screening Handling units for the retrofitting into the existing inlet works for handling screenings from the Fine Screens. Project Profile Area of catchment and contributing towns: Major towns included within the catchment are: Ayr, Prestwick, Troon, Kilmarnock, Irvine and other small towns. Population equivalent. 220,000 Number of contributing pumping stations. 6 large Sewage Pumping Stations Dry weather flow. 1,000 – 1,500 l/sec Maximum Flow. 4,500-5,500 l/sec Objective The existing works at Meadowhead STW consisted of both coarse screening and fine screening areas with the coarse screenings located in an enclosed ATEX rated building. The problem that was presented to HUBER was that the 4-off large grab screens had to cope with large variations in flow from catchment pumping stations that are located around a very flat area. The old screens were proving unreliable and required continual maintenance and tender loving care in order to keep them running. In addition to the coarse screen issue HUBER were also asked to look at a problem that Scottish Water were having with their existing fine screens screenings handling units. Scottish Water approached HUBER to investigate potential solutions available from Huber to solve the issue regarding these large flow variations, high screenings removal rates, improve the equipment reliability, and fit any new equipment within the existing building with limited space whilst complying to the ATEX zoning requirements. Because of the lack of reliability of the existing screens a very tight timescale was given from Scottish Water in order to carry out the necessary investigation, discussions, and agreement on type of screens. Solution After assessing the works along with investigations and observations regarding the nature of the flow and screenings being presented to the site, HUBER established that the best solution for the works would be the HUBER RakeMax® Multi-Rake Bar Screen. HUBER had already installed a number of these units throughout the UK and in particular the large inlet works at Belfast (Duncrue Street) and to give Scottish Water operatives and engineers confidence in the units a site visit to Ireland took place. Subsequently after further discussion between HUBER and Scottish Water, Huber prepared a final proposal for the equipment offered. During the design phase there was significant focus on the issue of handling the large volumes of screenings being presented to the screens and how this would be addressed when presenting the screenings into any launder trough from our Huber unit. Unlike large grab screens the HUBER RakeMax® unit has multiple screenings removal rakes and as such more, but smaller volumes, of screenings would be removed from the screen face and placed into the launder trough. Huber assess each application with regards to the number of rakes fitted to ensure that sufficient small volumes of screenings are presented to the launder trough and flow, allowing them to be easily transported and removed from the discharge area. HUBER assessed the merits of reuse of existing equipment (launder, access platforms and sundry items) to enable the most cost effective solution to be given. From layouts and calculations it was found that the existing launders with some minor modifications could be used, reducing the overall project costs to Scottish Water. Huber were awarded the contract and immediately started work on the project, reducing the project time from March delivery to December, improving the installation date by 3 months. One of the major challenges on this site (in addition to compliance with ATEX zonings of the existing building) was that HUBER also had to consider during the design of the works, issues with planned maintenance activities and lifting strategies caused by constraints arising from utilising the existing building, gantry, launder system and existing civils. As a result of this a great deal of thought and consideration had to be taken at the design and installation phase. Some of the issues resulting are detailed below. Transportation of the four large RakeMax® 6300/2752/19 from HUBER’s parent company in Germany required careful consideration. The most cost effective way entailed splitting the RakeMax® screens down into sections for transportation with re-assembly on site. To reduce delivery times, HUBER had the RakeMax® units shipped straight to site. This, however, meant HUBER needed to ensure that their Scottish installation teams had the required drawings, parts and detailed information to reassemble the units onsite, work which would normally be undertaken in HUBER’s workshop. Further consideration was required regarding the phases and order in which the machines would be installed. HUBER worked closely with Scottish Water to formulate a plan which met their fundamental requirement of keeping the plant operational whilst the new plant was installed mechanically, electrically and commissioned. Whilst the installation of the Coarse Screens was being completed, HUBER also replaced the fine screens screenings handling units with large variable speed HUBER WAP-L Wash Press screenings handling units. Each WAP-L was rated at 12 m³/hr at standard speed with the possibility of increasing the speed of the motors up by the use of VSD’s to give an output in excess of 15 m³/hr per unit. This was achieved by the sensing of the screenings level with in the units inlet hopper and when a set criteria was reached, and only at that time, the VSD would come into play and give the necessary high speed removal capacity. VSD’s were also fitted to the coarse screen washpress units to improve flexibility . The project budget, timescale, and operational requirements were achieved as a result of the good working relationship and close collaboration and communication between all parties. Large storms have already been experienced at this site and from the site operational feedback and response no issues have arisen and HUBER have yet another satisfied and happy client. Huber Technology Supplied 4 HUBER RakeMax® Multi-Rake Bar Screen 6,300mm long 2,752mm wide with 19mm bar spacing each handling 2200 l/s per screen working in a duty/ assist/ assist/ standby mode with control panels for each unit. 2 HUBER WAP-L Washpress units for coarse screenings handling with each unit handling 9.18 m³/hr per unit working on a duty and standby basis with the facility of working on a duty and assist basis if required with control panels for each unit. 2 HUBER WAP-L Washpress units for the fine screens with each unit handling 12 m³/hr working on a duty and standby basis with the facility of handling up to 15 m³/hr per unit with control panels for each unit. Product Profile RakeMax – Multi Rake Coarse Bar Screen High screenings removal capacities available Low hydraulic screen loss Easy retrofit into existing channels Suitable for deep channels Variable number of rakes to suit site specific needs. WAP-L– Launder Wash Press Different sizes for up to 18m3/hr of throughput Volume, weight and disposal cost reduction of up to 85% Compaction of up to 50% DS Washed screenings Over 370 UK installations[...]

[...]Markets and Industries We drive forward the sustainable use of water, energy and resources. Our customers have trusted HUBER products and solutions for decades. We are active worldwide and support planners as well as municipalities and industry in numerous challenges around the topic of water. Our customers have trusted HUBER products and solutions for decades. We are active worldwide and support planners as well as municipalities and industry in numerous challenges around the topic of water. Markets and Industries Wastewater Treatment Plants and Sewer Systems HUBER is expert in providing superior products, machines and solutions for wastewater treatment plants and sewer networks. Industrial companies HUBER is your experienced, reliable partner for various industrial branches and offers a full range of processes, solutions and machines for treatment of wastewater, sludge and waste. Drinking Water Suppliers HUBER has products and solutions for the treatment, storage and distribution of drinking water. Residential and commercial real estate HUBER has developed solutions for heating and cooling with wastewater as a regenerative energy source - an important contribution to sustainable building technology.[...]

[...]Wastewater treatment and sludge treatment in maritime applications: cruise ships and port facilities Wastewater screening Grease removal and COD reduction Compaction of sludge and residues Adapted solutions for tight spaces Minimum operating and maintenance requirements We offer proven and customised solutions for the specific situation on ships or in maritime applications. Adapted solutions for wastewater pre-treatment have been designed in particular for the confined space conditions, which fit in optimally. Whether you need individual machines or process solutions, we are your competent partner for equipping your entire wastewater plant. Changing wastewater compositions as well as high grease and solids loads characterise the wastewater produced on cruise ships. In addition, such plants must be designed with a high degree of safety and the lowest possible operating and maintenance costs. Therefore, robust and proven screening systems and dissolved air flotation plants are used to handle the different wastewater streams (usually divided into black and grey water). The machines are also used in port facilities, there partly as trailer-mounted or mobile plants. HUBER products and solutions for your requirements For the removal of coarse debris (sometimes whole pieces of clothing), especially from the black water line, the long-proven HUBER Sludgecleaner STRAINPRESS® separators are used. HUBER Micro Strainer ROTAMAT® Ro9 units are available as screening system prior to biological treatment. As biological treatment is often carried out as a membrane activated sludge system with MBR plants, HUBER ROTAMAT® Fine Screens with a mesh size of < 0.5 mm are suitable to achieve the best possible separation of hairs and fibres. HUBER Dissolved Air Flotation HDF plants are used to remove ultra-fine suspended solids, grease and oils. The clear effluent flows directly into the biological treatment system. The generated sludge is compacted with HUBER Screw Press Q-PRESS® units, thus reducing the amount of residual material to be disposed of to a minimum. The numerous projects we have successfully executed on many cruise ships, combined with our many years of experience in wastewater treatment, guarantee the reliable and efficient operation of your wastewater and/or residue treatment system! Our solutions for your challenges: COD, fat and solids reduction Reduce operating costs for wastewater treatment Reduce disposal costs for waste and sludge[...]

[...]Safe working in manholes – safe opening and access Manholes fulfil an important task in water supply and wastewater disposal. They are used for example where shut-off fittings in pipelines must be accessible, or to control sections of very long pipelines, and for aeration/deaeration or access to complex installations (e.g. well shafts, pressure reduction shafts). Easy and safe access must be ensured in each individual application. Most of the manholes are entered from the top. This means that the operating personnel must open the manhole cover in order to then be able to use an entrance aid for safe access. They must move over the manhole opening already when opening the cover. HUBER offers various solutions for safe working in manholes HUBER Manhole Covers : HUBER offers a wide range of stainless steel manhole covers to meet various requirements. They include raised, flush-fitting, burglar-resistant, flood-proof, pedestrian and load-bearing manhole covers. HUBER Guard Grate : After opening the manhole cover, there is a high risk of falling down into the manhole. Therefore, it is recommended to install a guard grate. With the HUBER Guard Grate you are well protected. HUBER Safety Access Ladders : To ensure easy and safe descent into the shaft, a safety ladder is usually installed. According to the Accident Prevention Regulations (UVV), fall protection is mandatory from a fall height of 3 m or 5 m. HUBER offers safety ladders, safety access ladders with guard rail as well as safety climbing devices with guard rail for the specific application. HUBER Entrance Aids : The purpose of access aids is to enable safe climbing on a safety ladder. For this purpose, HUBER offers various models of entrance aids to ensure the best access for different applications.[...]

[...]Manhole cover , weatherproof, rectangular in shape, completely made of 1.4307 (AISI 304 L) stainless steel, in accordance with DIN 1239, suitable for use in Ex zone 1. The cover consists of a stainless steel checkered plate, with flush-mounted screw closure, as standard with hardened safety lock (the profile cylinder to be provided by the customer), with handle, stainless steel gas-assisted spring dampers with integrated arrester which can only be undone by hand; robust, concealed hinges. Replaceable, insect-proof rubber seal attached to the underside of the cover for low wear. Load-bearing up to 5 kN. A connection for potential equalisation is provided. The frame consists of a Z-profile, with a height of 150 mm; ventilation openings are incorporated in the frame, covered at the back with insect-proof stainless steel mesh. Frame support width 80 mm, prepared for bolted fixing through the frame, with additional lift-off protection inside the shaft. The guard grate is made of angle profile, load-bearing up to 200 kg, integrated in the frame, flush with lower edge of frame (up to 1000 mm projection), with hinges and gas pressure springs for easy opening and closing; the guard grate and cover folding in the same direction. Manhole cover, antifall guard and frame shielded arc-welded, acid-treated in a pickling bath and passivated. Operating key included. Options 1.4404 (AISI 316 L) stainless steel Without ventilation openings Insulation of the cover, CFC-free Fixing material and foam rubber gasket Non-standard sizes Cover plate 4 mm smooth sheet metal Magnetic contact (cover open/shut indicator) Lacquer according to RAL colour chart Multi-part cover[...]

[...]Manhole cover , lift-off design, for flush fitting, weather-proof, rectangular type, load-bearing up to 500 kg/m², made of 1.4307 (AISI 304 L) stainless steel. The cover consists of a stainless steel tear pattern plate, with additional bracing on the bottom according to static requirements, certified slip resistance – grip coefficient USRV 54, with a low-wear seal on the cover bottom side, lockable with hexagon screws. Frame made from U-profile, installation dimensions 60 x 60mm, provided for installation in an existing rabbet. Manhole cover and frame shielded arc-welded, acid-treated in a pickling bath and passivated. Operating key included. Options 1.4404 (AISI 316 L) stainless steel With hinges, stainless steel gas-assisted spring dampers and integrated arrestor which can only be undone by hand For installation into a manhole neck Fixing material and foam rubber gasket Magnetic contact (cover open/shut indicator) Safety guard / barrier Safety guard / antifall guard Multi-part cover[...]