DescriptionFully welded ball valve's body is of spheroid and is all welded ... mounted and self-centering spring bearing seat 4,trunnion mounted ball type, low torque5,single piston design with self-relieving seat and double piston design ... anti-static designValve materials Body material : A105,LF2,F304, F316, Ball material : A105+ENP, LF2+ENP, F304, F316. Stem material :410 ...