Product Name: Flexible Wedge Gate Valves
Type: Flexible Wedge Gate Valve
Standard: API 600
Body Material: ASTM A216 WCB
Trim: Trim No. 8
Nominal Size: 20 Inch (DN500 / 508 mm)
Pressure: Class 150 LB, PN20
End Connection: RF Flanged
Surface Treatment: Epoxy Coating

Source: https://www.landee.cn/flexible-wedge-gate-valves-api-600-wcb-20-inch-cl150-rf.html