Cut Guide,Heat-Resistant Casting Cut Guide,Rolled Steel Cut Guide,Rolled Steel Casting Guides Can Be Customized JINGJIANG EASTSUN METALLURGICAL MECHANICS CO.,LTD , https://www.jesguide.comBall with a fixed axis of the ball valve, known as the fixed ball valve. Fixed ball valve is mainly used for high pressure large diameter. Depending on the mounting of the seat ring, the fixed ball valve can have two configurations: the front seat ball seal, the ball seat rear seal.