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), gas chromatography-MS (GC-MS) and inductively coupled plasma MS (ICP-MS). New developments in oil-free (dry) primary vacuum pumps have been introduced recently to the scientific instrument user markets and their impact is discussed below. SP105_44-51 Considerations for Primary. Vacuum Pumping...

...machines for dry vacuum pumping. A. D. Chew,a M. Galtry, R. G. Livesey, and I. Stones. BOC Edwards, Crawley, West Sussex RH10 9LW, United Kingdom. Received 17 December 2004; accepted 23 May 2005; published 22 July 2005. The goal of a single dry pump capable of reaching high vacuum and itself exhausting...

...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....

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...

[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...

...making. The large volumes of dissolved metallurgical gases arising from these processes, and the. generation of large amounts of metallic fines and oxide dust, require high-capacity vacuum pumping. equipment which is also very robust. Large Roots style mechanical vacuum booster pumps, designed...

...maint1.indd plant maintenance 1. Pumping potentially explosive atmospheres. THERE is no question that there. European Standard EN1127 sets out. One disadvantage of dilution is. are plenty of advantages to using. fundamental principles regarding the. that if it is used continuously in. dry vacuum pumps...

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