We are offering pneumatic star turning valve. the star-shaped spool is formed by six or more semi-circulars and then with the valve body, seal rings and pneumatic actuators and other elements together make up the pneumatic star turning valve. mainly used for pipes, containers, etc., serving for the speed and feeding. 0 180 and 180 0 semi-circular motion repeatedly. specifications: dn100, dn150, dn200, dn250, dn300material: valve body and spool sus304 or sus316; rubber ring silicon rubber or fluororubber surface:mirror face inside, brushed or mirror outsideinterface: cassette or standard flange.