The series of half-ball valve fora speaaJ purpose is a type of new product which was developed and invented by introducing for eign advanced technology,this senes of yoduct is mainly used tor sending off those medium with so much impurity substance which is easy of depositing,fouling.separabngom of the crystallisation,and the construction is adopted according to the theory of one sided wedge of off center,all of these can have the use of the pressing of the valve,adjusting and opening and closing through the driving device.The construction of the half-ball is divided into two constructions:half-ball and V-type in which the half-ball valve with a V-type notch is added to a special aqustrnent function except for the function of the ordinary half-ball valve.The series of the product is novel in construction,stable in capabdity.speedy and handy in opening and the abr-asion can be compensated by itself;The sealing is credible and durable whidh can be chosen by different assistant material quality according to the different working conditions and this construction is easy of adjusting and repairing;lt can also break with scab by itself,be easy of opening without blind spot,conquering the disadvantage of being easy of scabbing blocking leaking and having short life-span;The driving device has four types:wrench operated,worm gear and yrrOrm drwe.pneumatic driving and electric driving.
