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Why Vena contracta? This word is well known to anyone who performed calculation and selection of the control valves or flow metering devices. is the point in a fluid stream where the diameter of the stream is the least, and fluid velocity is at its maximum, such as in the case of a stream issuing out of a nozzle, (orifice). (Evangelista Torricelli, 1643). After that point stream receives new properties, necessary for the target application.

In other words, we are approaching a new level of harmony with our Customers.