GB/T 7774-2007 English PDF

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GB/T 7774-2007: Vacuum technology -- Turbomolecular pumps -- Measurement of performance characteristics
Status: Valid

GB/T 7774: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 7774-2007	274	Add to Cart	3 days	Vacuum technology -- Turbomolecular pumps -- Measurement of performance characteristics	Valid
GB/T 7774-1987	399	Add to Cart	3 days	Methods of measurement of the performance characteristics of turbo-molecular pumps	Obsolete

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Basic data

Standard ID: GB/T 7774-2007 (GB/T7774-2007)
Description (Translated English): Vacuum technology -- Turbomolecular pumps -- Measurement of performance characteristics
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J78
Classification of International Standard: 23.160
Word Count Estimation: 14,137
Date of Issue: 2007-12-02
Date of Implementation: 2008-06-01
Older Standard (superseded by this standard): GB/T 7774-1987
Adopted Standard: ISO 5302-2003, IDT
Regulation (derived from): China National Standard Approval Announcement No. 13 of 2007 (No. 113)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the methods of measurement turbo molecular pump performance parameters. It applies to all sizes and all types of turbo- molecular pump. Comprising: a) with mechanical or magnetic bearings, additional traction stage b) with or without.

GB/T 7774-2007: Vacuum technology -- Turbomolecular pumps -- Measurement of performance characteristics

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Vacuum technology. Turbomolecular pumps. Measurement of performance characteristics ICS 23.160 J78 National Standards of People's Republic of China GB/T 7774-2007/ISO 5302.2003 Replacing GB/T 7774-1987 Measurement Vacuum technology turbo molecular pump performance parameters (ISO 5302.2003, IDT) Posted 2007-12-02 2008-06-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is identical with ISO 5302.2003 "Vacuum technology turbo molecular pump performance parameters Measurements" (in English). For ease of use, this standard also made the following editorial changes. --- "This International Standard" be replaced by "this standard"; --- Replacing the word "article" the "standard"; --- The term "references" to "normative references"; --- Delete ISO 5302.2003 Foreword. This standard replaces GB/T 7774-1987 "turbo molecular pump performance test methods." Appendix A of this standard is an informative annex. The standard proposed by China Machinery Industry Federation. The vacuum technology standard by the National Standardization Technical Committee (SAC/TC18) centralized. This standard was drafted. Beijing KYKY Technology Development Co., Ltd. Chengdu South-ray machines, Shenyang Vacuum Technology Institute The study. The main drafters of this standard. Zou Meng, Permutation ACTUATORS Germany Zhang Qin, Wang Bin, Li Jianhui, Fanlin Dong, Li shadow. This standard replaces the standards previously issued as follows. --- GB/T 7774-1987. GB/T 7774-2007/ISO 5302.2003 Measurement Vacuum technology turbo molecular pump performance parameters

1 Scope

This standard specifies the method for measuring the turbo molecular pump performance parameters, it applies to all sizes and all types of turbo-molecular pump. include. a) with mechanical or magnetic bearings; b) with or without additional traction levels. Note. Due to the turbo molecular pump before the pump needs to support the following curve as a volumetric flow rate - curved supplementary inlet pressure to fully determine its performance. --- Flow curves; --- Compression ratio curve; --- Inlet pressure curve. Including all relevant regional and various gases.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. ISO 3529-2 Vacuum technology - Vocabulary - Part 2. Vacuum pumps and related terms

3 Terms and Definitions

ISO 3529-2 as well as established the following terms and definitions apply to this standard. 3.1 3.2 Qmax Pump continuous pumping without damaging or destroying the maximum gas load, the unit is Pa liters per second (Pa · L/s) [millibar liters per second (mbar · L/s)]. Note. This limit depends on the pump design parameters, in most cases, this parameter is the maximum temperature of the pump is given a predetermined position. Qmax value depends on the draw Gas, before the pump used and the cooling conditions. 3.3 Q V Under ideal conditions, the volume of gas flow per unit time from the test pump inlet cover. Note 1. For practical reasons the measurement, the pump for a given volume of gas flow rate is generally agreed to be equal to the flow of the gas and pressure to balance the sentinel providers, body Volume flow rate using the unit of cubic meters per second (m3/s) or liters per second (L/s). Note 2. Sometimes the term "pumping speed" and the symbol "s" instead of the volumetric flow rate. 3.4 Test cover gradually approaching pressure. GB/T 7774-2007/ISO 5302.2003 ......

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