Controlling the flow of liquid or gas by means of a fixed orifice is largely dependent upon controlling all the variables that may effect the coefficient of discharge ( cd value) of the orifice
Until recently, high costs and difficult-to-use programs kept computational fluid dynamics (CFD) mostly in the hands of research, academia, and large OEMs
Predicting the life of rubbery sealing elements used in severe environments, represented by high temperature and/or aggressive fluids, is rather difficult.
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