In this work results of research hydraulic characteristics of the return valves intended for transfer special liquids abroach are presented. The task of search hydraulic characteristics of valves are decide with special methods of mathematical modeling with application of packets applied programs and by engineering calculations with application of reference books on the basis of the approved engineering methods of calculation. In work the methodology of determination economic benefit is presented at use slide valves instead ball, allowing to estimate a difference in costs of resources at comparison work valves of various types.
hydraulic resistance
Reynolds's number
a viscous (working) liquid
pressure loss
