● NOMINAL PATH DN
For Example, DN50 and DN100, this string letters and numbers represent the nominal size of the valve is 50 mm, 100 mm. According to the regulations, usually DN ≥50 caliber valve should be marked on the valve body, also could be marked on the handle or other visible parts. If the Valve is American standard, will be marked 1 / 2 inch, 1 inch, 2 inches directly.
● NOMINAL PRESSURE PN
Such as PN16, PN25, etc. , this is the nominal pressure of the valve 1.6 MPA, 2.5 MPA, with the flange must be the same nominal pressure level. Nominal pressure will be greater than the actual use of pressure, that is, this figure is not the valve’s final working pressure, belongs to the highest use of pressure. If is the American Standard Valve will note for 150Lb, day standard is Jis10k, 20K and so on;
● MATERIAL CODE
Such as WCB (Carbon Steel) , SUS304(stainless steel 304) , SUS316(stainless steel 316) and so on. Note that this letter is the valve body material, the valve sealing material and other parts of the material is not necessarily the same as the valve body material, sealing surface material code should be in the nameplate information of the model.
● ARROW →
This is a better understanding, is the use of the valve installation direction, should be used according to the Arrow direction, no Arrow can be marked two-way arbitrary installation.
● OTHER LETTERS AND FIGURES
Some valve rough smelting furnace number, station number, characteristics and other information will be marked on the valve body. Some manufacturers will be in the body of their own trademarks, or logo, or alphanumeric.
Post time: Jul-28-2021