Product Name: API 602 Swing Check Valve
Design Standards: API 602, ASME B16.34
Size: 1-1/2 Inch
Pressure Rating: Class 300 LB
Body Material: ASTM B148 C95800 (Alu-Bronze)
Bonnet Material: ASTM B148 C95800
Disc Material: ASTM B148 C95800
Seat Material: ASTM B148 C95800
End Connection: ASME B16.5 RF Flanged
Third-Party Inspection: BV 3.2

Source: https://www.landee.cn/api-602-swing-check-valve-astm-b148-c95800-1-1-2-in-cl300.html