ERHARD GmbH & Co. KG • Meeboldstr. 22 • D-89522 Heidenheim
Phone: +49 (0)7321 320 0 • Fax: +49 (0)7321 320 491 • E-Mail: info@talis-group.com

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Water treatment

Whether from rivers, lakes, dams or the ground water – clean drinking water is a prerequisite for human life. Drinking water is understood as water that is so clean that it is suitable for humans to consume.

Water suppliers therefore have the task of thoroughly testing and guaranteeing the water quality from the point of exploration, via treatment and transportation to supplying the water to the end customer. Making specific changes to improve the water quality is known as water treatment. Substances are either removed from (e. g. by means of cleaning or desalination) or added to the water or certain parameters are adjusted (e. g. adjustment of a certain pH value). For this, physical (such as air ventilation, atomisation or thermal action), chemical (such as oxidation, ion exchange or osmosis) as well as biological methods (such as biochemical oxidation) are used.


The extraction and transportation of drinking water, our most important commodity,
place special requirements on the quality of valves.

Being 100 % suitable for drinking water is therefore of decisive importance for the valves used in these processes. Naturally all the materials used in the TALIS valves, from the metals to the elastomers, therefore satisfy the current regulations of the DVGW (German Technical and Scientific Association for Gas and Water) and many international organisations and this even applies to the smallest components. The strictest upper limit values are adhered to, but the values are usually considerably lower. Our valves also meet all the requirements for protection against contamination, i. e. the growth of bacterial strains on elastomers.