VAG-Group Contact Career Info Portal Applications Industry Sectors Products Technical Service Consulting References Homepage VAG-Group Quality VAG Quality Patented and certified - approved valves Gate valves and butterfly valves, non-return valves, plunger valves, hollow-jet discharge valves, air valves, control valves, house connection valves and fire hydrants - VAG valves can be found in virtually all water works, power plants and pumping stations as well as in numerous building connection systems. There’s a good reason for that: Numerous successful patent applications and certificates for our company and its products are proof of our know-how and expertise in innovative valve development. However, quality checking comes before the awards. It ensures the durability and functional reliability that you rightly expect from VAG. Whether high water pressure or extreme temperatures, the material must be the right one. In extensive coating tests as well as pressure, leak-tightness and functional tests we simulate the emergencies that your systems must cope with every day. In addition to mathematical calculations, we carry out specific model trials in our own VAG test field. If necessary, we make use of the capacities of renowned universities. Coating thickness Magnetic inductive test to determine the thickness of coatings or corrosion-inhibiting coating agents. In the picture: Test according to GSK guidelines (Quality Association for the Heavy Duty Corrosion Protection of Powder Coated Valves and Fittings) minimum coat thickness > 250 µm. Adhesion testing The pull-off test (DIN EN ISO 4624) is used to test how well the coating is bonded to the raw material. Minimum adhesion > 12 N/mm2. Impact testing A pendulum that falls through a fixed distance is used for impact testing. The pendulum hits the coated surface with an energy of 5 Nm. The coating may neither crack nor peel. Porosity testing The coating is checked for freeness from porosity using a high-voltage test device at a defined test voltage. The test is performed using a rubber electrode. Infiltration testing The cathodic infiltration test is a corrosion test according to GSK guidelines and DIN 30677 that is carried out over a test period of 30 days at 23 °C. A defect is created on the coated surface of the test specimen, which is subjected to cathodic polarisation in a sodium chloride solution for the entire test period. AWWA Proof-of-design Test This proof-of-design test is a durability test according to AWWA C 504-87 with 1,000 load alternations against one-sided pressure. (AWWA = American Water Works Association). Certificates ISO 9001 Download ISO 14001 Download ISO 50001 Download OHSAS 18001 Download RAL-GZ 662/2 Quality Mark VAG GmbH Download RAL-GZ 662/2 Quality Mark VAG s.r.o. Download RAL-GZ 662/2 Quality Mark VAG Water Systems (Taicang) Co. Ltd Download Information on ASME Sec. III N-Stamp Contact VAG-Group Headquarters Carl-Reuther-Str. 1 68305 Mannheim Germany Phone: +49 (621) 749 0 Fax: +49 (621) 749 2156 Write e-mail Further contacts Click here My VAG In order to use all functions and advantages of the site, you need a user account. Register now / Login © VAG GmbH Sitemap Imprint Privacy Policy Copyright T&C Suppliers - Purchasing VAG Intranet Contact