Ball valve — The valve stem drives the closure member (ball). The ball rotates around the valve axis, and turns 90° to open and close. This valve has no installation direction requirement. It realizes quick opening and closing with good sealing performance. It is suitable for occasions requiring frequent operation and zero leakage. Ball valves are generally not used for flow regulation.Ball valves can be classified into metal seated(hard-seated) and soft-seated types according to sealing materials.By connection types,they are categorized as flanged connection,threaded connection,welded connection,wafer connection and clamp connection.
English