Appilcation 1 Design according to MSS-SP-70 2 Flange end face is according to 125PSI/ 150PSI Main Parts and Materials 1 Body Cast iron or ductile iron 2 Seat Brass 3 Disc Cast iron or ductile iron 4 Stem Carbon steel or stainless steel 5 Bonnet Cast iron or ductile iron 6 Hand wheel Cast iron or ductile iron