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GB/T 25753.4-2015 English PDF

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US$169.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 25753.4-2015: Vacuum technology -- Roots vacuum pump -- Measurement of performance characteristics -- Part 4: Measurement of noise
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 25753.4-2015	169	Add to Cart	3 days	Vacuum technology -- Roots vacuum pump -- Measurement of performance characteristics -- Part 4: Measurement of noise	Valid

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Basic data

Standard ID: GB/T 25753.4-2015 (GB/T25753.4-2015)
Description (Translated English): Vacuum technology -- Roots vacuum pump -- Measurement of performance characteristics -- Part 4: Measurement of noise
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J78
Classification of International Standard: 23.160
Word Count Estimation: 8,843
Date of Issue: 2015-12-10
Date of Implementation: 2017-01-01
Quoted Standard: GB 3102.7; GB/T 3241; GB/T 3785.1-2010; GB/T 3947; GB/T 14574; GB/T 15173-2010; GB/T 21271-2007
Regulation (derived from): National Standard Announcement 2015 No.38
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 noise measurement Roots vacuum pumps acoustic environment, measuring instruments, installation, load and operating conditions of the pump, and measured sound power level. This standard applies to roots pump (hereinafter referred to as the Roots pump).

GB/T 25753.4-2015: Vacuum technology -- Roots vacuum pump -- Measurement of performance characteristics -- Part 4: Measurement of noise

---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 - Roots vacuum pump - Measurement of performance characteristics - Part 4. Measurement of noise ICS 23.160 J78 National Standards of People's Republic of China Roots vacuum pumps - Measurement of performance art Part 4. Noise measurement characteristics-Part 4. Measurementofnoise Issued on. 2015-12-10 2017-01-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 25753 "Roots vacuum pumps - Measurement of performance art" is divided into four parts. --- Part 1. The maximum allowable differential pressure measurement; --- Part 2. Zero flow compression ratio measurement; --- Part 3. Measurement of differential pressure relief valve; --- Part 4. Noise measurement. This is Part 4 GB/T 25753 of. This section drafted in accordance with GB/T 1.1-2009 given rules. This part is proposed by China Machinery Industry Federation. This part of the National Vacuum Technology Standardization Technical Committee (SAC/TC18) centralized. This section is responsible for drafting. Zhejiang Vacuum Equipment Group Co., Ltd. Participated in the drafting of this section. Ludwig magnetic fluid Hunan Co., Ltd., Zhongshan Kaixuan Vacuum Technology Engineering Co., Ltd., Zhejiang God for Vacuum Equipment Manufacturing Co., Ltd., Hangzhou Xihu Vacuum Equipment Factory, Shandong Precision Pump Co., Ltd., Ningbo ULVAC Vacuum Technology Co., Taizhou Global Vacuum Equipment Manufacturing Co., Ltd., Ma Leybold Vacuum Equipment Group Co., Ltd., Shandong par Vacuum Equipment Co., Ltd., Shenyang Shenyang Vacuum Technology Research Institute. The main drafters of this section. Wang Xi, Luogen Song, Xu Tao, the words following spring, Wang hair, Li Longjun, Wang Deshun, Ren Weimin, Li Feng, He Xiaobo, Zhao meter spring, Zhao Weisheng, Wang Yu-xiang, Zhang Dongqing, Li Yuying. Roots vacuum pumps - Measurement of performance art Part 4. Noise measurement

1 Scope

This section GB/T 25753 specifies the measure Roots vacuum pump noise acoustic environment, measuring instruments, pump installation, load and run Conditions, and the sound power level measurements. This section applies to Roots vacuum pump (hereinafter referred to as the Roots pump).

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB 3102.7 Quantities and units of acoustics GB/T 3241 electro-acoustics octave and fractional octave filters GB/T 3785.1-2010 Electric Acoustic Sound Level Meters - Part 1. Specification GB/T 3947 Acoustics Terminology Declaration and verification of GB/T 14574 Acoustics machinery and equipment noise emission values GB/T 15173-2010 electric acoustic sound calibrators GB/T 21271-2007 vacuum pump noise measurement technology

3 Terms and Definitions

GB 3102.7 and GB/T 3947 defined by the following terms and definitions apply to this document. 3.1 Sound Power soundpower Noise source in unit time emitted acoustic energy. Note. in watts (W). 3.2 Sound power level soundpowerlevel LW Than the sound power emitted by the test and the reference sound power of noise sources logarithm to the base 10 multiplied by 10. Note 1. in decibels (dB). Note 2. You must specify the frequency weighting used. Such as A-weighted sound power level is LWA. Note 3. The reference sound power 1pW (1pW = 10-12 W). 3.3 Background noise correction backgroundnoisecorrection K1 By the effect of background noise on the surface sound pressure level and the introduction of a correction term. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 25753.4-2015_English be delivered?

Answer: Upon your order, we will start to translate GB/T 25753.4-2015_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 25753.4-2015_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 25753.4-2015_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.