There is a lot of knowledge involved in the coloring of valve products. . .

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This post was last edited by nadosh on 2016-12-21 at 19:53. There is a lot to know about the coloring of valve products. . . :Lol, this is just my personal knowledge; if there are any mistakes, my friends HaiChuan should please correct them. Lol – it would be nice to receive some flowers as a reward, or applause would also work fine. P. Painting of valve products: 1. Valve products are painted according to the material of their valve bodies, with colors specified in the table below: Valve body material – Gray cast iron, Malleable cast iron, Ductile iron, Carbon steel, Acid-resistant steel, Stainless steel, Alloy steel. Colors for valve body painting – Black, Silver, Medium gray, Sky blue, Medium blue. Note: Acid-resistant steel and stainless steel do not require painting, and copper alloys are also not painted. 2. To indicate the material of the sealing surface of the valve product, identification painting should be applied to the drive handwheel, handle, and knob, with colors as specified in the table below. Sealing surface material: Copper alloy, Babbitt, Acid-resistant steel, Stainless steel, Nitrided steel, Boronized steel, Cemented carbide, Monel alloy, Plastic, Rubber, Cast iron. Paint color: Bright red, Light yellow, Sky blue, Sky blue, Sky blue, Dark yellow, Purplish red, Medium green, Black. Note: (1) When the sealing surface materials of the valve seat and the moving parts are different, painting is applied according to the material with lower hardness ； (2) Check valve, applied on the top of the valve cover ； (3) Safety valves, pressure relief valves, and steam traps are mounted on the valve cover or valve cap. 3. The painting color of the transmission mechanism is as follows: (1) Electric units: the standard type is painted gray, while the three-in-one type (for outdoor use, explosion-proof, and corrosion-resistant) is painted dark blue. (2) Other transmission mechanisms such as pneumatic, hydraulic, and gear drives shall be painted in the same color as the product.