Product Name: ASTM A105 Swing Check Valves
Type: Swing Check Valve
Standard: API 602, ASME B16.34
Body Material: ASTM A105
Bonnet Material: ASTM A105
Size: 2 Inch, DN50, 50 mm
Pressure Rating: Class 600 LB, PN100
End Connection: RF Flanged per ASME B16.5
Surface Finish: Blackening

Source: https://www.landee.cn/astm-a105-swing-check-valves-api-602-2-in-600-lb-flanged.html