... sealing and fire-safe structure. Different types of floating ball valve: QA41F, QA41Y, QA341F, QA641F, QA941F and etc. Floating ball ... general and butt-welding connection is optional) are suitable for using on various kinds of pipeline from pressure Class 150 ... oil, nitric acid, acetic acid, oxidizing substance, carbamide and etc. Manual/worm gear/pneumatic or electric actuators could be chosen by ...