No:GB/T 12220-1989 English Name:General purpose industrial valves-Marking
Valve type normally should show the type of drive, connection type, structural features, the sealing surface material, body material and the nominal pressure and other factors. Standardization of valve type of valve design, selection, selling more convenient. Valve types and materials of today, more and more of the valve model is also more complex preparation. Although our preparation of a unified standard valve model, but increasingly unable to meet the needs of industrial development in the valve. At present, the valve manufacturer is generally uniform numbering; where a uniform number of methods can not, according to the manufacturer's need to develop their own numbering.