High-Pressure Pumps and Compressors

In a further approximation, 1.7 can be used. This value is typical of radial acting turbomachines, if optimally used and designed. 

Industrial Higfi Pressure Applications Precedes, Equipment mid Safety, First Edition. Edited by Rudolf E ers. 2012 Wiley-VCH Verlag GmbH Co. KGaA. Published 2012 by Wiley-VCH Verlag GmbH Co. KGaA. 

In case such a machine is worked with varying pressure, it is easy to imagine that this will result in a varying flow (A as well the machine reacts in a pressure-soft way. For this reason, a low range of flow variation required for dosing purposes carmot be achieved with pumps like these. 

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At the industrial scale this extraction method is not installed yet for supercritical fluids. The reason is that the investment costs are relatively high because of the needed number of high pressure vessels in addition, for the case of different pressure levels and flow rates, in each extraction step one high pressure pump or compressor is necessary. 

The work of the Bureau of Mines Demonstration Plant Branch at Louisiana, Mo., has resulted in improvements in high pressure instrumentation, welded construction, and development of simplified pumps and compressors (26-28). 

Manual or automatic operation. Pumps and compressors often exist in manual, electrically operated, or pneumatically operated versions. Whenever practical, manual instruments should be preferred for laboratory applications, especially when a high-pressure set-up is used close to its limit. This forces experimenters to closely control the system by requiring their constant attention and vigilance. 

Turbines are a common feature on process plant, where they provide economical drives for rotating machinery, particularly centrifugal and axial pumps and compressors, as well as electrical generators in power stations. They use the expansion of hot, high-pressure gas or steam to produce mechanical power. 

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