Flange stainless steel ball valve refers to the stainless steel ball valve connected by a flange, by rotating the valve to make the valve clear or blocked. Stainless steel ball valve is not easy to be media erosion, has been widely used in various industries. Our common ball valve from the material, can be divided into: carbon steel ball valve, 304 stainless steel ball valve, 316 ball valve and brass ball valve, etc., described below its operation and use: 1) before operation to confirm the pipeline and the valve has been washed; 2) The operation of the valve drives the valve stem to rotate according to the input signal of the actuator: When the valve is rotated 1/4 turn (900) in the forward direction, the valve is shut off. 3) When the actuator direction indicator arrow parallel to the pipeline, the valve is open; When the arrow is vertical to the pipeline, the valve is closed. Stainless steel ball valve is widely used in petroleum, chemical, power generation, paper and other departments, as well as people's daily life.