ISO 1608-2:1989 Preview
Vapour vacuum pumps -- Measurement of performance characteristics -- Part 2: Measurement of critical backing pressure
This standard was last reviewed and confirmed in 2017. Therefore this version remains current.
The considered method of measurement deals with vapours jet vacuum pumps, diffusions pumps and diffusion-ejector pumps. The dependence of the performance of these pumps on the backing pressure can only be completely described be means of a curve relating the inlet and backing pressure over the range of operation. The recommended test dome and the principle of the test equipment are illustrated.
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