Valve type should usually indicate the valve type, drive mode, connection form, structural features, sealing surface material, body material and nominal pressure and other factors. The standardization of the valve model of the valve design, selection, sales provided a convenient. Valve type and material more and more today, the valve model is also more and more complex. Although China has a unified standard valve model, but more and can not adapt to the needs of the development of the valve industry. At present, the valve manufacturer generally uses a uniform numbering method; where a uniform numbering method can not be adopted, all the manufacturing plants formulate a numbering method according to their own needs. "Valve model preparation method" for industrial pipe valve, throttle, ball valve, butterfly valve, diaphragm valve, plunger valve, plug valve, check valve, safety valve, pressure reducing valve, steam trap. It includes the valve model and valve name.