... Valves Structure Type: Rising Stem, Non-rising Stem, Single Disc, Double Disc 9)Operated Way: Handwheel, Gear, Three Way Ball ValvesThree ... way ball valves are suitable for use on various kinds of pipelines of Class150~Class300, PN16~PN40 for switching, dividing, and ... combining medium flow, of which the operation manners include manual, worm gear, pneumatic or ...