Technical specification:
| Structural formation | Pressure sealed swing type check valve |
| Design reference | GB / API |
| Design standard | GB/T 12236、GB/T 19672 / API6D、BS1868 |
| Face to face | GB/T 12221、GB/T 19672 / API6D、ASME B16.10 |
| Butt-welding ends | GB/T 12224 / ASME B16.25 |
| Test&inspection | GB/T 13927、JB/T 9092 / API598、API6D、BS6755 |
Note: The sizes of valve connecting flange and butt-welding terminas can be designed according to customer's requirement
Major parts material form:
| No | Part name | ASTM Material | GB Material |
| 1 | Body | WCB、WC1、WC6、WC9、C5、CF8、CF8M、CF8C、CF3、CF3M | WCB、WC1、WC6、WC9、C5、CF8、CF8M、CF8C、CF3、CF3M |
| 2 | Disc | WCB、WC1、WC6、WC9、C5、CF8、CF8M、CF8C、CF3、CF3M | WCB、WC1、WC6、WC9、C5、CF8、CF8M、CF8C、CF3、CF3M |
| 3 | Seat | A105、F11、F22、F5、F9、F304、F316、F321、F304L、F316L | 25、1Cr18Ni9Ti、0Cr18Ni12Mo2Ti、20Cr1Mo1V、25Cr2MoV |
| 4 | Rocker | WCB、WC1、WC6、WC9、C5、CF8、CF8M、CF8C、CF3、CF3M | WCB、WC1、WC6、WC9、C5、CF8、CF8M、CF8C、CF3、CF3M |
| 5 | Pivot | Gr.F6a、F22、F304、F316、F321、F304L、F316L | 1Cr13、2Cr13、1Cr18Ni9Ti、0Cr18Ni12Mo2Ti |
| 6 | Bonnet | A105、F11、F22、F5、F9、F304、F316、F321、F304L、F316L | 25、1Cr18Ni9Ti、0Cr18Ni12Mo2Ti、20Cr1Mo1V、25Cr2MoV |
| 7 | Sealing ring | Graphite & stainless wire | Graphite & stainless wire |
| 8 | Cover | WCB、WC1、WC6、WC9、C5、CF8、CF8M、CF8C、CF3、CF3M | WCB、WC1、WC6、WC9、C5、CF8、CF8M、CF8C、CF3、CF3M |
| 9 | Stud | A193-B7、A193-B8、A193-B8M、B16 | 35CrMoA、25Cr2MoV、0Cr18Ni9、0Cr17Ni12Mo2 |
| 10 | Six angle nuts | A194-2H、A194-8、A194-8M、4 | 45、35CrMoA、25Cr2MoV、0Cr18Ni9、0Cr17Ni12Mo2 |