The Check Valve description:

1) Size: NPS 1/2"-32"
2) Pressure: Class 150 - 1, 500
3) Materials: WCB, LCB, WC6, WC9, C12, C5, CF8, CF3, CF3M, CF8M
4) Design and manufacture standards: API 6D, BS 1868, ASME B16.34
5) Face to face standards: API 6D, ASME B16.10, DIN 3202
6) End connection standards: ASME B16.11, ASME B1.20.1, ASME B16.5, ASME B16.47, DIN2543-2550, ASME B16.25.
7) Test standards: ISO5208, API 6D, BS 6755.
8) Structure types: Regular pattern, pressure sealed pattern, damping pattern.