DERVOS ball valves materials include Carbon Steel, Alloy Steel, Low-temperature Carbon Steel, Stainless Steel, 20 Alloy, Duplex Stainless Steel, Aluminum Bronze, etc. Cast steel materials include: WCB, CF8, CF8M, CF3, CF3M, C5, WC6, WC9, LCB. Forged steel materials include: A105, F304, F316, F304L, F316L, F5, F11, F22, LF2. DERVOS ball valves can be customized according to your needs. You may have questions, how does DERVOS strictly control the ball valve quality? As a professional manufacturer of ball valve, it is demonstrated by DERVOS Certificates -- API6D, PED CE, UKCA, EAC, API624, API607, API6FA, ISO9001, ISO45001, ISO15848, ATEX, etc.