Product Name: ASTM A351 CF8M Wafer Check Valve, Dual Plate
Standard: API 594
Body Material: ASTM A351 CF8M
Disc Material: ASTM A351 CF8M
Spring Material: SS 316
Size: 2 Inch, DN50, 50 mm
Pressure: Class 150 LB, PN20
Source: https://www.landee.cn/astm-a351-cf8m-wafer-check-valve-api-594-2-in-dual-plate.html