There are DN300, which represent the pipe diameter, what other numbers and letters represent
General valve will have the basic parameters of the valve, including caliber, pressure levels, materials, manufacturers trademarks, flow requirements will have flow signs, casting, then there may be a casting furnace number.
Examples of valve type and designation methodsA) example: electric valve model establishment, flange connection, rod wedge gate valve sealing surface material, directly processed by the valve body, nominal pressure PN0.1MPa, the valve body is made of grey cast iron gate valve: Z942W-1 electric wedge gate valve.B) ball valve model examples: manual, external thread connection, floating straight seat, sealing surface material for fluorine plastic, nominal pressure PN4.0MPa, body material for 1Crl8Ni9Ti ball valve: Q21F-40P external thread ball valve.C) example of diaphragm valve model: pneumatic normally open, flange connection, ridge type structure, and rubber lining, nominal pressure PN0.6MPa, valve body material for gray cast iron diaphragm valve: G6K41J-6 pneumatic normally open rubber lined diaphragm valve.D) model for example: hydraulic butterfly valve, flange connection, vertical plate, valve seat sealing materials for copper casting, valve valve sealing materials for rubber, nominal pressure PN0.25MPa, the valve body is made of grey cast iron valve: D741X-2.5 hydraulic valve.E) model for example: valve electric driving butt welding connection, straight through, the valve seat sealing surface material for welding hard alloy, the working temperature of 540 DEG C when the working pressure of 7.0MPa, the body material Cr-Mo-V steel valve: valve J961Y-P54170V electric welding
What number and number do you have to say?. On the general body, trademarks, patterns, DN caliber, PN kg pressure. The larger valve will also be marked with body material.
