Leader in Ball Valves Production and Selling. Set up in 1989 ADLERS.p.A Ball Valves Company is at the moment one of the main company in the production of ball valves. The production is concentrated in the new and modern premises in Santo Stefano Ticino (Italy) on a total area of 12.500 m². Thanks to refined quality together with a very interesting price ADLER ball valves are mainly sold all over the countries. Our aim is to produce: "a complete range privileging the Quality"! NEW: Adler ball valves are now certified TR (GOST-R)