... ,API6D,CQC,PDO 2.Forged Check Valve Size 1/4"~2" 3.Class 800~1500LB A105,F5,F9,F11 ... B 1.20.13. Test and inspection conform to: API 5984. Structure features: B.B, Piston Type5. Materials ... , LCB, CF8M, CF3M,ETC.Standard:Design and Manufacture: API 6D, ASME B16.34Face To Face Dimension: ASME B16. ... Dimension: ASME B16.25Test And Inspection: API 598, API 6DFire-safe Design: API 607/6FA Size:1/4"-4" Material ...