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GB/T 40344.2-2021 English PDF

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US$334.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 40344.2-2021: Vacuum technology - Standard methods for measuring vacuum-pump performance - Part 2: Positive displacement vacuum pumps
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 40344.2-2021	334	Add to Cart	4 days	Vacuum technology - Standard methods for measuring vacuum-pump performance - Part 2: Positive displacement vacuum pumps	Valid

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Basic data

Standard ID: GB/T 40344.2-2021 (GB/T40344.2-2021)
Description (Translated English): Vacuum technology - Standard methods for measuring vacuum-pump performance - Part 2: Positive displacement vacuum pumps
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J78
Word Count Estimation: 18,182
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 40344.2-2021: Vacuum technology - Standard methods for measuring vacuum-pump performance - Part 2: Positive displacement vacuum pumps

---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 - Standard methods for measuring vacuum-pump performance - Part 2.Positive displacement vacuum pumps ICS 23.160 J78 National Standards of People's Republic of China Standard method for measuring performance of vacuum pumps in vacuum technology Part 2.Volumetric Vacuum Pump (ISO 21360-2.2020, IDT) Released on 2021-08-20 2022-03-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword Ⅰ Introduction Ⅱ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Symbol 2 5 Test method 3 5.1 Measurement of volume flow rate 3 5.1.1 Measurement method 3 5.1.2 Flow method 3 5.1.3 Air extraction method 3 5.1.4 Operating conditions 3 5.2 Measurement of base pressure 3 5.3 Measurement of water vapor tolerance 4 5.4 Determination of power consumption 4 5.4.1 Overview 4 5.4.2 Measurement conditions 4 5.4.3 Measurement Step 4 5.5 Minimum starting temperature 4 5.6 Measurement uncertainty 4 Appendix A (informative appendix) Measurement of water vapor tolerance 5 Appendix B (Informative Appendix) Calculation of Water Vapor Tolerance 11 Appendix C (informative appendix) Table of saturated vapor pressure of water 12 Reference 14

Foreword

GB/T 40344 "Vacuum Technology Vacuum Pump Performance Measurement Standard Method" plans to release the following parts. ---Part 1.General requirements; ---Part 2.Volumetric vacuum pump; ---Part 3.Specific parameters of mechanical booster pumps; ---Part 4.Turbo molecular pump. This part is Part 2 of GB/T 40344. This section was drafted in accordance with the rules given in GB/T 1.1-2009. The translation method used in this part is equivalent to the ISO 21360-22.2020 ``Vacuum Technology Vacuum Pump Performance Measurement Standard Method Part 2 Sub. Volumetric Vacuum Pump. This section has made the following editorial changes. ---Modified the volume flow rate unit in 5.1.3, changed from m3/s to L/s, and GB/T 40344.1-2021 3.1 for volume flow The regulations of the rate unit are consistent; ---Chapter 4 adds the number and title of the table. This part was proposed by China Machinery Industry Federation. This part is under the jurisdiction of the National Vacuum Technology Standardization Technical Committee (SAC/TC18). Drafting organizations of this section. Zhejiang Vacuum Equipment Group Co., Ltd., Zhejiang Hangzhen Energy Technology Co., Ltd., Hefei Zhihai Optoelectronics Technology Technology Co., Ltd., Hunan Vigor Magnetic Fluid Co., Ltd., Zibo Vacuum Equipment Factory Co., Ltd., Taizhou Xingguang Vacuum Equipment Manufacturing Co., Ltd. Company, Weihai Zhide Vacuum Technology Co., Ltd., Beijing Beiyi Innovation Vacuum Technology Co., Ltd., Zibo City Electromechanical Pump Product Quality Inspection Research Institute, Taizhou Global Vacuum Equipment Manufacturing Co., Ltd., Dongguan Wuhua New Material Co., Ltd., Shandong Bozhong Vacuum Equipment Co., Ltd. Company, Shenyang Vacuum Technology Research Institute Co., Ltd. The main drafters of this section. Xu Tao, Wang Xilong, Luo Gensong, Zhong Yunhui, Gao Xunyi, Ren Weimin, Yuan Xuejuan, Liu Lei, Yan Jichun, Wang Gongfa, Xu Fajian, Huang Zhiting, Zhou Fashun, Chen Haiyao, Lin Lezhong, Hou Ronghua, Wang Hongxue, Zhang Sheng, Song Longbo, Zhao Weisheng, Zhao Jichun, Wang Changming, Liu Xiaoying, Lei Chundong, Wang Lingling.

Introduction

This section specifies the measurement method of volumetric vacuum pump performance data. GB/T 40344.1 gives the total measurement of vacuum pump performance data Body requirements, this part is a supplement to it. The method described here complies with the relevant regulations in current national standards and international standards. The purpose of compiling this section is to fit the measurement The methods of volumetric vacuum pump performance data are summarized together. When there is a difference with GB/T 40344.1, this section shall prevail. Standard method for measuring performance of vacuum pumps in vacuum technology Part 2.Volumetric Vacuum Pump

1 Scope

This part of GB/T 40344 specifies the volume flow rate, base pressure, water vapor tolerance, power consumption and minimum starting temperature of volumetric vacuum pumps. The measuring method of degree, the volumetric vacuum pump directly exhausts the atmosphere and its base pressure is usually lower than 10kPa. In this section, it is necessary to use the method specified in GB/T 40344.1 to determine the volume flow rate and base pressure. This section also applies to other pumps that directly exhaust the atmosphere, such as traction pumps.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 40344.1-2021 Vacuum technology vacuum pump performance measurement standard method Part 1.General requirements (ISO 21360-21. 2020, IDT)

3 Terms and definitions

The following terms and definitions defined in GB/T 40344.1 apply to this document. The address of the terminology database maintained by ISO and IEC for standardization is as follows. 3.1 Gas town gasbalast Introduce gas or air into the compression volume of the pump. 3.2 Water vapor tolerance pH2O The maximum value of water vapor pressure that can be delivered by the pump without condensation in the pump. Note 1.If there is no water vapor condensation problem, for example, the pump is equipped with an oil-water separation device, then the highest water vapor pressure is recognized. Note 2.The test report should include environmental conditions. 3.3 Water vapour capacity The mass of water that can be delivered by the pump without condensation in a unit of time. Note 1.The test report should include environmental conditions. 3.4 Working volume sweptvolume VSW The volume of gas delivered by the pump in a cycle. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 40344.2-2021_English be delivered?

Answer: Upon your order, we will start to translate GB/T 40344.2-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 40344.2-2021_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 40344.2-2021_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.