Construction & material selection
AVK Syntec ball valves are made of high grade materials. For the sealing high quality and durable NBR rubber is used. A careful choice has been made to use high quality PE100 material for body and spigots, ensuring 100% welding compatibility to all PE100 and PE80 pipes and fittings. The ball is made out of an engineering plastic with high scratch resistance and smooth surface finishing contributing to low operating torques. Next to this, the chemical resistance to a very wide range of media is covered.
The main internal construction of the ball valves is based on a clever engineered seat arrangement for realiable sealing performance. By means of a seat retainer, the ball seat is firmly kept in place. Spigots and body are connected by a proven and reliable butt welding technique. For the welding, the leading DVS2207-1 guidelines are strictly followed. The skimming and welding steps are performed by fully automated welding stations, guaranteeing ultimate consistency of the ball valves. The grease has been selected after numerous tests to achieve maximum ease of operation.
Approvals & testing
AVK PE ball valves are type tested by an independent accredited laboratory according worldwide leading standards such as EN1555-4, ISO4437-4. EN12201-4, GIS/V7-2 and GB15558.3. During type testing, the valves are not only submitted to various long and short term leaktightness checks, but also to rigorous pulling, bending and thermal cycling tests. The operating mechanism meets or exceeds high prescribed torques at extreme temperatures.
The advanced in-house testing equipment enables AVK Syntec to make synthetic valves of the highest quality. Each valve is tested for operating torque and leaktightness at low and high pressure. Besides, per batch, valves undergo hydrostatic strength testing (at elevated temperatures) to confirm long term performance.