What is the mini ball valve ? Mini ball vlave is a kind of valve which the opening and closing parts(ball) are driven by the valve stem , and around the ball valve axis for rotating movement of the valve .Max pressure could be up to 6.4Mpa , the connection has : female-female, male-male, male-female , thread type is NPT, BSPT, BSPP , the ball valve is small body , the weight is very light, so it is called miniature ball valve. Get Price on HuiYi mini ball valve manufacturer.