Flow Characteristics of Final Control Elements
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article number
00258_2009_01_10
In the first Part of the presented Article the hydraulic basics for determining the fl ow characteristics of actuators, for example Gas pressure regulators, are explained. The main relevant flow equations and the corresponding approximate solutions are derived. The approximate solutions will be analysed and compared with the exact results. The second Part of the article contains the derivation of the equations for calculating the flow coefficient (KG-value). Practical applications of KG-value will be explained. -The KG-value is compared with the Cg-value according to DIN EN 334. The authors recommend the application of the KG-value to compute the flow characteristics of actuators.
| Authors | Jens Mischner/Yiqun Pan and Karl-Heinz Pfl üger |
|---|---|
| Publishing Date | 1 Jan 2009 |
| Format | |
| Zeitschrift | gas for energy - Issue 01 2009 |
| Publisher | DIV Deutscher Industrieverlag GmbH |
| Language | English |
| Pages | 12 |
| Title | Flow Characteristics of Final Control Elements |
| Description | In the first Part of the presented Article the hydraulic basics for determining the fl ow characteristics of actuators, for example Gas pressure regulators, are explained. The main relevant flow equations and the corresponding approximate solutions are derived. The approximate solutions will be analysed and compared with the exact results. The second Part of the article contains the derivation of the equations for calculating the flow coefficient (KG-value). Practical applications of KG-value will be explained. -The KG-value is compared with the Cg-value according to DIN EN 334. The authors recommend the application of the KG-value to compute the flow characteristics of actuators. |
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