Specifications: 1)Production enforce standard Desing And Manutacture: API 600 or API 6D Face to face/End to end: ANSI B16. 10 Flange dimensions: ANSI B16. 5 Butt welding dimension: ANSI B16. 25 Pressure temperature lating: ANSI B16. 34 Inspection and test: API 598 API 6D 2)Major parameter Size: 2"-48" Pound class: 150Lb--1500Lb Body Cover Disc: WCB WC6 WC9 LCB CF8 CF3 CF3M CF8M Type of operation: Manual, conical gear actuator, electric actuator Structure Type: Rising Stem and Wedge Single Disc