What’s difference between a sanitary valve and an industrial valve?
Material. The sanitary valve body material must use health standards of stainless steel ASI 304 or 316L. But industrial valve body commonly uses carbon steel, alloy steel, cast iron or bronze, which are easily corroded or rust.
Metal surface. Moreover, the hygienic valve and tube fittings require a high requirement for the roughness of the metal surface, all parts that contact with the medium must be finely polished. Surface roughness is calculated measuring the average of surface heights and depths across the surface. This measurement is most commonly shown as “Ra”. SF1 RA20=0.51μm.
The ASME BPE surface finish table as below: