Whatever ball valve is a simple product, but a lot of questions arise when choosing this product. Some of them I revealed in previous articles - about marking ball valves , about its components and different versions of the rod . Today I will touch on the subject of the flow area. Picture 1. Ball valve of Nilo series from RBM Spa Ball valves only perform the locking function, they are not regulating valves. But capacity is also important for them. There is a characteristic of flow area of the valves. This term refers to the ratio of the nominal diameter of the pipe to the diameter of the lock ball. Valves, in which this ratio is 90-99%, are called full-bore . Picture 2. Different types of ball valves depending on the flow area Valves with standard passage have a ratio of diameters from 70% to 90%. If this figure is less than 70%, then such valves are called with a reduced passage . For example, consider the assortment of the Italian b...
Сантехнический мир в деталях