These application notes provide a simplified procedure for sizing control valves at standard service conditions. The data required to size a valve, such as the nominal size, nominal pressures and KVS, is contained in the SAMSON data sheets for self-operated regulators and control valves. Self-operated regulators and control valves can be sized accurately using the DIN IEC 534 procedure. For most applications, however, the following sizing equations formulated in the VDI/VDE Guideline 2173 provide a sufficient degree of accuracy. In order to calculate the valve flow coefficient KV, the operating data specified in the figure to the right is required.

pdf icon SAMSON-2005-Valve-sizing-sample-problems.pdf

SAMSON (2005) Valve sizing sample problems
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