1.Body,bonnet:Cast iron/Ductile iron

2.Seat:Brass

3.Seat Ring:Brass

4.Disc:Ductile iron

5.Ring:2Cr13

6.Pin:Carbon steel

7.Nut:Carbon steel

8.Bracket:WCB

9.Bonnet:Cast iron

10.Bolt:Steel

11.Flange end:DIN2532 DIN2533 BS4504

12.Working pressure:PN10 PN16