How do we distinguish three ball valve

The new 3pc ball valve ISO5211(with mounting pad) specially design by Zhejiang yuzheng company is very easy to use with a removable section which allows easy maintenance compare to the old version.The bodies are investment cast to provide high quality finishing and strength. The ISO5211 is incorporated into the body design to provide case of mounting actuators and eliminate the cost of bracket and couple.The full part well design minimize drop pressure across the valve and gives smooth flow characteristics.The ball valve high quality finishing contributes to good scaling and low operating torque, also the valve can be operate in an environment of 300 degree with resistance to corrosion because it’s made of stainless steel material.