1)Name:pneumatic ball valve 2)Materials:PVC-U,CPVC,PP,PP-H,PVDF 3) ... :2008 4)Standard:DIN,ANSI,CNS,JIS 1) Name: pneumatic ball valve2) Materials: PVC-U,PVC-C,PP,PP-H,PVDF3 ... and environment-friendly4) New attractive design5) All-plastic housing and with no metal parts on the outside6) Pre-load spring sets ...