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GB/T 21272-2007Vapour vacuum pumps measurement of performance characteristics -- Measurement of back-streaming rate of pump fluid and the heating time (English PDF)

蒸汽流真空泵性能测量方法泵液返流率和加热时间的测量

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Issued by

Standardization Administration of China

Level / Type

National · Recommended

Issue date

December 2, 2007

Implementation date

June 1, 2008

Scope

GB/T 21272-2007 is the English-translated version of 蒸汽流真空泵性能测量方法泵液返流率和加热时间的测量.

GB/T 21272-2007 — This standard specifies the method for measuring the steam flow rate vacuum pump fluid reflux and the heating time. This standard applies to the following vacuum vapor flow. diffusion pump, diffusion ejector pump (hereinafter referred to as the pump). Pump room temperature (20 ± 5) °C, Pump fluid vapor pressure lower than 100Pa.

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Document preview — GB/T 21272-2007

National Standard of the People's Republic of China

ICS: 23.160
Classification: J 78

Issued by: Standardization Administration of China

What this standard covers1
Document data2

What this standard covers

This standard specifies the method for measuring the steam flow rate and vacuum pump liquid reflux heating time. This standard applies to the following steam flow pump: diffusion pump, diffusion ejector pump. Pump room temperature (20°C 5)��C, pump fluid vapor pressure less than 100Pa.

Document data

International classification (ICS): 23.160.

Chinese classification (CCS): J78.

Estimated length of the Chinese original: 10,116 words.

Adopted international standard: DIN 28427-1983, MOD.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 7 pages — is available in the English PDF.

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