A ball valve is a product of the sanitary market that quickly and permanently entered the household world. So to speak, seriously and for a long time. Ball valve Now the market has a lot of offers from different manufacturers. Among this "bouquet" of the assortment, it is increasingly difficult to orientate yourself in what corresponds to the price / quality category. Today, we remove many white spots that are related to the marking of ball valves. Dimensional designations DN - nominal diameter - this designation determines the size of the pipeline fittings. The nominal diameter is adopted for all elements of pipelines (mostly metal). Nominal diameters for ball valves are defined in DSTU GOST 28338: 2008 "Pipeline connections and fittings. Conditional passages (nominal sizes) ". Earlier, the diameter of the crane was denoted by the conventional value of DN. ½ "- often the size of the crane is also duplicated in inches." On small d...
Сантехнический мир в деталях