http://www.ruixinvalves.com/fo....rged-steel-valve/Bor RB/FB (Reduce bore/Full bore) Design and Manufacture: ASME B16.34, BS5352 Structural length: ASME B16.10 Flanged ends: ASME B16.5 Test: API 598 Marking standard: MSS SP-25 Sizes: 1/2''-2'' Pressures: ANSI 150lb-2500lb Materials: ASTM A105/A150N, ASTM A182-F11/F22/F5/F9, ASTM A182-F304,F316, F321, F304L,F316L Ends: RF and RTJ flange ends to ANSI B16.5 OR ANSI B16.47 and MSS SP-44 standard. BW flange ends to ANSI B16.25 standard. Type of Operation: Lever, Connection dimensions of Worm Gear actuator. El