TYPE OF VALVES: Gate valves, Globe Valves, â Yâ stainers, Ring Valves, Butterfly Valves, Pressured Valves THE QUALITY CONTROLL ARE MADE ACCORDING TO: ASTM A 216, ASTM A 217, ASTM A 351⦠MATERIALS THAT ARE USED FOR PRODUCTION ARE ACCORDING TO STANDARDS: EN 10204, EN 12680-1 and 12680-2, EN 1369, EN 12454 and MSS SP 55, EN 12881â¦