The valve model should usually indicate the valve type, drive mode, connection form, structural characteristics, sealing surface material, body material and nominal pressure. In order to unify manufacturing standards and correctly select and identify valves, valves for industrial pipelines in my country have basically achieved serialization, generalization, and standardization. However, with the increasing number of valve types and materials, the preparation of valve models has become more and more complex, and the unified standardization of valve model preparation has become less and less able to meet the needs of the development of the valve industry. At present, valve manufacturers generally adopt a unified numbering method. If a unified numbering method cannot be adopted, each manufacturer shall formulate a numbering method according to their own needs. This section is still based on the original Ministry of Machinery Industry standard "Valve Model Compilation Method" (JB/T308-2004) to introduce the compilation method of valve model. The valve name is named according to the transmission mode, connection form, structural form, lining material and type.

1) "Flange" in the connection form. 2) The "open rod", "elasticity" and "rigidity" of a gate in the structural form; b. The "straight-through" type of globe valve and jet valve; "floating" and "straight-through" type of eight butterfly valves; "Straight-through" and "single flap" of return valve; h. "Not closed" of safety valve. 3) Material name in the material of valve seat sealing surface. Example of valve model and name preparation method. 1) Motor drive, method A gate valve with blue connection, rising rod wedge type double gate plate FNo. 1MPa, and the valve body material is gray cast iron; the inner valve body is directly processed from the seat sealing surface material, and the nominal pressure is z942w1 electric wedge type double gate plate interrogation valve 2) Manual, external Threaded connection, floating straight-through type, valve seat sealing surface material is fluoroplastic, nominal pressure PN4, DMFa, valve body material is 1Crl8Ni9Ti ball valve: Q21F-4P external thread ball valve 3) Pneumatic normal rise type, flange connection, ridge type, The lining material is rubber-lined, and the nominal pressure PNo.6MPa The valve body material is gray cast iron diaphragm valve: G6k4lJ-6 pneumatic normally open rubber-lined diaphragm valve 4) Hydraulic, flange connection, vertical plate type, valve seat Butterfly valve with cast copper material, valve disc sealing surface material rubber PNo. 25MPa, valve body material gray cast iron: D741x2.5 hydraulic four-valve 5) Motor drive, welding connection, straight-through, valve seat sealing surface material is stack Welded cemented carbide, the pressure under 540.c is P"l7MPa, the valve body material is chrome copper vanadium steel globe valve: