Key points
Valve solutions for drinking water treatment
In a successful municipal water treatment application that treats 300m³ of water per minute, GEMÜ provides reliable valve solutions for ultra-filtration and partial softening processes.
Process Description
Ultra-filtration UF
After coarse filtration, the water is fed to the Ultra-filtration passing through porous membranes with a pressure drop of 0,1 – 0,8 bar. This retains the finest solids, turbidity and pollens, as well as bacteria from passing through the membrane. However, the water containing dissolved ingredients such as hardness components or minerals, and small molecules can still pass through.
Partial softening and regeneration
Ion exchange reduces the concentrations of hardness components (calcium and magnesium), and undesirable substances such as nitrates, sulphates and chlorides, by half from the sanitized water. Carbonic acid is generated as a by-product and dissolves into water and carbon dioxide (CO2). The pure-water degasifier then removes the excess CO2 before transferring the treated water to a pure-water container and feeding it into the municipal water supply following UV sterilization. This reduces the water hardness from a hard level (480 ppm CaCO3) to a medium level of 240 ppm CaCO3.
Raw water enriched with CO2 is used as a regenerating agent for the mixed-bed filter reversing the direction of the exchange process where high pressure dissolves CO2 to create carbonic acid. The carbonic acid is then fed in the counter current over the mixed-bed, regenerating the ion exchanger resin. About 95% of the CO2 required for regeneration can be recovered and fed back into the process.
GEMÜ products in use
All treatment processes for both raw and treated water distributions use GEMÜ 480 Victoria series butterfly valves (up to DN 400), GEMÜ D450 plastic butterfly valves range, GEMÜ 717 manual plastic ball valves and GEMÜ LSC limit switch box for quarter turn actuators.
Why GEMÜ?
GEMÜ offers the next generation of rubber lined butterfly valves, R480 Victoria series, as a direct replacement for the GEMÜ 480, offering multiple enhanced product features.
Thanks to its flow-optimized and sleek disc design, the R480 series achieves higher flow rate factors. This reduces the pressure loss, giving the butterfly valves greater energy efficiency. The PTFE-coated bushes reduce torques, not only allowing further savings through lower actuator costs, but also making the valves significantly more durable and therefore increasing longevity. Furthermore, the technical optimization of the liner improves tightness, which guarantees bubble tight sealing and resistance to slipping.
With its wide range of valves and accessories, as well as measurement and control instrumentation, GEMÜ provides an optimal solution from a single source, saving the customers time, effort and cost not only in logistics and installation but also in documentation.
In addition, plastic butterfly valves and ball valves used in this application are available in various actuator and material versions.
More information about this application, click here.
GEMÜ R481 data-sheet.
GEMÜ R487 data-sheet.
The latest generation of Butterfly Valves GEMÜ R480 Victoria series product flyer.
Tel: 01925 824044
Email: enquiries@gemu-valves
Web: www.gemu.co.uk
GEMU Valves Ltd
- +441925824044
- customer.support@gemu.co.uk
- http://www.gemu.co.uk
- 10 Olympic Way Birchwood Warrington Cheshire WA2 0YL GB
About us
GEMÜ is a world leading manufacturer of valves, measurement and control systems for liquids, vapours and gases, especially when it comes to solutions for sterile applications. The GEMÜ Group currently employs over 1900 members of staff worldwide.
Manufacturing is carried out at six manufacturing sites across Germany, Switzerland, China, Brazil, France and the USA. The Group is active on all five continents with 27 subsidiaries and has a large distributor network in more than 50 countries
With the increasing requirements for process engineering, we offer a wide range of products providing solutions for a broad spectrum of customer groups, such as:
Specialising in all of the processes involved in the pharmaceutical, biotechnology, cosmetics, food and beverage industries. Application brochure: Solutions for the pharmaceutical, foodstuffs and biotechnology industries.
Specialising in industrial water treatment, chemicals, processing industry, surface finishing, power generation and environmental engineering. Application brochure: Solutions for industrial applications.
Focusing on valves for the production of semiconductors and microchips, photovoltaic systems and batteries, and ultra-high-purity chemicals. Application brochure: Solutions for microelectronics, semiconductors and battery production.
- Service
Training courses for service and maintenance personnel, repair services and the commissioning of GEMÜ products directly at the customer's site.
GEMÜ GB is based in Warrington providing product sales and technical support. Our product quality, application knowledge and broad range of services, make us a market leader in our field within the UK.
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New PDF product catalogues are available for download.
Click on the links below to download the new product catalogues. We recommend you open the links for download using Google Chrome browser.
Product Catalogue for the Pharmaceutical, Foodstuff and Biotechnology Industries
Product Catalogue for Industrial Applications
Product Catalogue for Semiconductor Production
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Where we supply to
UK Ireland
Industries we supply to
Chemicals, Food and Beverage, Pharmaceutical Cosmetics Toiletries, Water and Wastewater
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