Product Name: Double-Door Resilient Seat Wafer Check Valve
Type: Double-Door Resilient Seat Wafer Check Valve
Size: DN150, 150 mm, 6 Inch
End Connection: DIN PN6 / PN10 / PN16, ANSI B16.5 Class 150 LB
Body Material: Ductile Iron
Disc Material: DI
Shaft Material: SS 420
Seat Material: EPDM
Spring Material: SS 304

Source: https://www.landee.cn/double-door-wafer-check-valve-ductile-iron-dn150-pn6-10-16.html