JB/T 11238-2011Vacuum technology - Efficiency of liquid ring vacuum pumps (English PDF)
真空技术 液环真空泵效率
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
December 20, 2011
Implementation date
April 1, 2012
Scope
JB/T 11238-2011 is the English-translated version of 真空技术 液环真空泵效率.
JB/T 11238-2011 is a recommended Chinese machinery industry standard belonging to the vacuum technology group, and its subject is the efficiency of liquid ring vacuum pumps.
It gives the isothermal compression efficiency curve for a single-stage liquid ring pump, water or another liquid being the ring fluid, at a pump inlet pressure of 400 hPa, and it explains how that curve is to be applied.
The pumps it is written for are single-stage liquid ring vacuum pumps whose gas throughput is 1 cubic metre per minute or more. The catalogue records J78 in the Chinese classification and 23.160 in the international one. It quotes GB/T 13929-2011, JB/T 7255-2007 and JB/T 10770-2007.
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Document preview — JB/T 11238-2011
National Standard of the People's Republic of China
- ICS
- 23.160
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- Foreword
- Scope
- Normative references
- About this standard
- Classification and status
1 Foreword
JB/T 11238-2011 was issued by MIIT on 20 December 2011 and has been in force since 1 April 2012.
2 Scope
This standard is a recommended Chinese machinery industry standard belonging to the vacuum technology group, and its subject is the efficiency of liquid ring vacuum pumps. It gives the isothermal compression efficiency curve for a single-stage liquid ring pump, water or another liquid being the ring fluid, at a pump inlet pressure of 400 hPa, and it explains how that curve is to be applied. The pumps it is written for are single-stage liquid ring vacuum pumps whose gas throughput is 1 cubic metre per minute or more. The catalogue records J78 in the Chinese classification and 23.160 in the international one. It quotes GB/T 13929-2011, JB/T 7255-2007 and JB/T 10770-2007.
3 Normative references
JB/T 11238-2011 cites the following standards, which apply in full or in part through the references made to them in its clauses.
GB/T 13929-2011
JB/T 7255-2007 — Water ring vacuum pumps and compressors
JB/T 10770-2007 — Vacuum technology - Acceptance specification for liquid ring vacuum pumps
4 About this standard
Issued by: MIIT
English translation: about 15 pages
5 Classification and status
International classification (ICS): 23.160
Prefix JB/T: recommended standard.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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Related Standards
JB/T 10770-2007 — Vacuum technology - Acceptance specification for liquid ring vacuum pumps
JB/T 7255-2007 — Water ring vacuum pumps and compressors
JB/T 10062-2026 — Probes used in ultrasonic flaw detection - Testing methods for performance
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