球阀往往是靠阀后或阀前阀座达到单面密封的，只有极个别特殊场合才使用阀前、阀后双面密封。因此，在通常情况下，只有一半球面(甚至更少)起密封作用于是产生了V形球球阀。V形球球阀优点。
1、球体重量轻，这对于节约材料尤其是贵重金属材料有不可低估的经济效益。
2、精加工表面积小，减少加工时间。
3、能有效地减小球阀启动时的质性力。
主要用于输送纤维和纸浆等介质。球体上的V形缺口能起切断机作用，以避免纤维物料粘在球体、阀体和阀座之间，另外v形球还广泛用来调节流量。
Ball valves get single-face sealed often upon the seat ring of either after-valve or before-valve and，only in very few of special cases，both before-valve and
After-valve dual-faces are sealed Hence，the ball valve of a V-type ball is so formed as with only half of the sphere(even less)acting at sealing The advantages of the said ball valve：
1、Light，offering an economic benefit which must not be underrate for saving the material，especially the noble metal materials.
2、Small precisely processed surface area，reducing the processing time
3、Can effectively reduce the inertia force of the ball valve at starting
Used to transport fiber and paper pulp etc media The V-type cut on the ball can act as cut-0ff so as to prevent fiber material from adhering in between ball body and seat ring and the V-type ball cal also be used for the flow adjustmen