Coating solutions, control tasks and pot insights

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Corrosion protection has a new colour VAG hydrants are now more resistant than ever before! While they used to be enamel-coated on the inside and epoxy-coated on the outside, the new generation is now 100% epoxy-powder coated (EPP) – on the inside and outside. This ensures a completely seamless epoxy-powder coating with perfect corrosion protection according to the German GSK* requirements. With this coating, VAG sets a new quality standard that applies to all hydrants in all nominal diameters. Tip: You can recognise the new technology by the colour of a standpost hydrant. Due to the complete epoxy coating, its lower column is no longer black but blue. The outside of the upper column is equipped with additional UV protection made of a red polyester material. *GSK: The Quality Assurance Association for Heavy-Duty Corrosion Protection is the global industry network of companies operating drinking water, wastewater and gas supply networks Controlling the flow – hollow-jet discharge versus plunger valves Both hollow-jet discharge and plunger valves are control valves with a highly sophisticated design. They are primarily used in dams and hydropower stations. Due to their fabricated design, the manufacture of hollow-jet discharge valves is more complex than the manufacture of plunger valves. Whether one or the other valve should be used depends on the purpose, installation situation and the amount of water to be discharged:  Hollow-jet discharge valves Discharge: More discharge at the same nominal diameter due to the nearly free cross section and less head loss inside the valve Installation: Only possible as an end-of-line valve Water jet: Always hollow in the standard version without pipe hood Learn more... Plunger valves Discharge: Less discharge due to the annular cross section and the head loss inside the valve Installation: At the end of a pipeline and in pipeline systems Water jet: More concentrated Learn more...   Pots with no bottom! How right the ancient Romans were! Erosion comes from Latin erodere, which means to eat away. And you don’t have to be a geologist to imagine how the water gnaws away at the rocks. Stones collect in a round depression and are whirled around by the flow. Like grinding stones they dig deeper and deeper into the rock. Just wait a couple of thousand years – and you will have the perfect pothole. Famous potholes can be found e.g. in the Viamala Gorge (Graubünden, Switzerland) or in Namibia. Upcoming events 18 – 20 September 2018 Fenasan Sao Paulo, Brasil 11 – 12 October 2018 ANCOLD Melbourne, Australia 25 October 2018 AQUARAMA Brabanthal Leuven, Belgium 27 – 30 November 2018 Pollutec 2018 Lyon, France VAG GmbH Carl-Reuther-Strasse 1 68305 Mannheim / Germany Phone: +49 (621) 749-0 Fax: +49 (621) 749 2156 Managing Directors: Marcus Sander Felix Hornicek Dr. Thomas Walter   Local Court Mannheim HRB 9735 VAD-ID: DE811126215 www.vag-group.com info@vag-group.com

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