For more than thirty years, ARTMARK has specialized in the supply of high quality valve balls to end users in the ball valve industry. Our factories control the raw material supply chain to insure that all balls produced carry full material certification. Full chemical and physical material reports accompany all production shipments. Modern machining methods provide consistency and accuracy throughout the production run. Effective quality control systems, such as SPC, coupled with extensive final inspection guarantee 100% compliance with blueprint specifications.