Stainless steel ball valves have O - type and V - type ball valves. O-type ball valve adopts a floating structure, the ball core is precision casting, the appearance of hard chrome plating, the seat adopts enhanced polytetrafluoroethylene material, the same caliber as the flow channel, great flow capacity, minimal flow resistance, no leakage when closed, generally used as an on-off valve, especially suitable for high viscosity, fiber, granular media; V-ball valve adopts fixed structure, the ball core is opened with V-shaped notch, can achieve proportional adjustment, flow characteristics for approximate percentage. Let's take a look at the classification basis and restrictions on the use of stainless steel ball valves.