API 6D Swing Check Valves

China Valves description:
Name: Swing Type Check Valve.
Design: API 6D–Full Bore.
Body: ASTM A216 WCB.
Nominal size: 16 Inch.
Nominal class: Class 150.
Connection ends: RF Flanged ends.
Face to face: as per ASME B16.10.
Test and inspection: API 598.