What Are the General Application Occasions for Ball Valves?
Ball valves are generally limited by sealing materials. Because
ball valves are usually made of some plastic materials, the main principle of ball valves is to adjust gas and liquid by metal balls under the action of medium, mainly by the extrusion between metal balls and plastic valve seats.
Sometimes plastic changes occur between valve seats, which can compensate the precision between metal spheres, so as to ensure the confidentiality of
ball valves. Because the valve seat of the ball valve is usually made of plastic, the fire resistance and that of the ball valve should be well considered in the selection process, mainly in petroleum, chemical and various metallurgical departments. If it is used in flammable and explosive pipelines, more attention should be paid to the fire resistance and that of materials.
Now there are many varieties of
ball valves. When oil pipelines are buried underground, metal welded ball valves are mainly used. This kind of ball valve with special performance should be carefully selected, otherwise there will be unpredictable danger.