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There are many drivers for vacuum configuration in mass spectrometry (MS) and other scientific instrumentation applications. These include: vacuum performance of the primary pump itself (speed, compression, power, and so forth); environmental impact, power, construction, service interval...

The goal of a single _dry_ pump capable of reaching high vacuum and itself exhausting to atmospheric pressure has long existed in the vacuum field. The development of a single-shaft, high-speed pump EPX _second generation_ mechanism has gone some considerable way to achieving this goal. The pump...

...presents unique pumping challenges. This article discusses the factors leading to increased hydrogen use in these two processes, details the pumping challenges hydrogen presents for each, and highlights the vacuum pumping capabilities that are needed to resolve these challenges....

[Reprinted from Heat Treating, July 1986] The second installment in our series on practical aspects of vacuum heat treating focuses on the critical subject of pumping, highlighting the relationship between efficiency and vacuum pressure....

...was investigated. With reference to the results of that study, guiding principles will be presented for the design of a vacuum pumping system for use in low-pressure, high-gas-flow processing. Experimental setup used to evaluate pumps. A diagram of the experimental setup is shown in Figure 1...

Vacuum is used to control the environment in many heat treatment processes and the vacuum pumping systems used may be simple or complex. This article offers practical recommendations to handle operational issues that can arise with these systems to optimize performance, reliability and safety....

Vacuum degassing (VD) and vacuum oxygen decarburisation (VOD) are the main processes in secondary steel making. The large volumes of dissolved contaminant gases arising and the generation of metallic fines and oxide dust require robust, high-capacity pumping equipment. Today's advanced vacuum dry...

Selecting the right vacuum pumping system for your heat treat application is a complex and challenging task with the realization that no single type of vacuum pump is likely to provide all the characteristics necessary to meet all your process requirements. Vacuum pump selection not only demands...

Far from disappearing as a result of the introduction of solid state electronics, vacuum pumping technology today plays a key supporting role in at least 70 general manufacturing applications, spanning a wide range of industries. In particular, semiconductor, flat-panel display, solar manufacturing...

Abstract: Shortening the period of vacuum pumping will directly lower the vacuum degree of testing chambers and in turn lower the accuracy of test result. Gas permeability of materials is mainly tested with differential-pressure method or equal-pressure method, of which the former one is the most...

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