GB/T 45322.2-2025 English PDF

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GB/T 45322.2-2025: Particle─Separation performance test for particle size separator - Part 2: Divided flow method
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Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 45322.2-2025	279	Add to Cart	3 days	Particle─Separation performance test for particle size separator - Part 2: Divided flow method	Valid

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GB/T 39990   GB/T 39193   GB/T 21649.2   GB/T 29024.3   GB/T 29024.2   GB/T 45322.1   

Basic data

Standard ID: GB/T 45322.2-2025 (GB/T45322.2-2025)
Description (Translated English): Particle��Separation performance test for particle size separator - Part 2: Divided flow method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A28
Classification of International Standard: 19.120
Word Count Estimation: 14,141
Date of Issue: 2025-02-28
Date of Implementation: 2025-09-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 45322.2-2025: Particle─Separation performance test for particle size separator - Part 2: Divided flow method

---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.
GB/T 45322.2-2025 English version. Particle─Separation performance test for particle size separator - Part 2.Divided flow method ICS 19.120 CCSA28 National Standard of the People's Republic of China Particle size cutter cutting performance test Part 2.Dividing Methods Part 2.Divided flow method Released on 2025-02-28 2025-09-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Method Principle 1 5 Instruments and Materials 1 5.1 Instrument 1 5.2 Materials 2 6 Test Step 2 6.1 Preparation before testing 2 6.2 Cutter cutting performance test 3 6.3 Test data processing 3 7 Test Report 4 7.1 Information about the particle size cutter being measured 4 7.2 Test Information 4 7.3 Test Results 4 Appendix A (Normative) Test system composition and performance requirements 5 References 7

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is part 2 of GB/T 45322 "Testing the cutting performance of particle size cutters". GB/T 45322 has been published. The following parts. --- Part 1.General; --- Part 2.Diversion method. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed and coordinated by the National Technical Committee for Particle Characterization and Sorting and Sieve Standardization (SAC/TC168). This document was drafted by. Qingdao Metrology Technology Research Institute, Hefei Hongmeng Standard Technology Research Institute Co., Ltd., Wuhan Tianhong Environmental Protection Industry Co., Ltd., Qingdao Laoying Haina Optoelectronics Environmental Protection Group Co., Ltd., Qingdao Mingde Environmental Protection Instrument Co., Ltd., Qingdao Rongguang Electronic Technology Co., Ltd., China National Institute of Metrology, Zhangjiagang Yangtze River Delta Biosafety Research Center, Qingdao Zhongrui Intelligent Instrument Co., Ltd., Qingdao Standardization Research Institute, China National Environmental Monitoring Center, Chinese Academy of Environmental Sciences, Shanghai Institute of Metrology and Testing Technology, Beijing Municipal Planning Bureau, Institute of Metrology and Testing, Shandong Institute of Metrology and Testing, Beijing Shian Technology Co., Ltd., Fujian Institute of Metrology and Testing, China Institute of Chemistry, Henan Institute of Metrology and Testing, Hubei Institute of Metrology and Testing Technology, Henan Institute of Inspection and Testing Research Institute Group Co., Ltd., Chongqing Metrology and Quality Inspection Institute, and Qingdao Environmental Protection Science Research Institute. The main drafters of this document are. Liu Wei, Liu Yanli, Fan Xinfeng, Chen Zhonghui, Ding Wansheng, Zhao Fenglong, Zou Yaxiong, Zhang Wenge, Zhou Lei, Zeng Xianchen, He Qiangqiang, Wang Ting, Wang Yu, Yang Wen, Li Yafei, Zhang Guocheng, Sui Feng, Liu Jiaqi, Li Na, Huang Zhihuang, Xiao Chengchuan, Li Jianpeng, Zhao Xiaoning, Meng Ying, Wang Jing, Shi Enjie, Li Xianhong, Lu Xingjie, Guo Bo, Yang Jinfeng, and Fan Hui.

Introduction

The particle size cutter is the core part that separates air particles by size (aerodynamic diameter) based on the principle of aerodynamics. It is often used to collect particles of a specific size range in the air. The cutting performance reflects the ability of the cutter to separate particles of different sizes. One of the important factors affecting sampling consistency. Common cutting performance test methods include split flow method, static box method and elution method. Select the appropriate test method based on the test conditions. GB/T 45322 is planned to consist of 4 parts. --- Part 1.General. The purpose is to provide common definitions and requirements for the test method of particle size cutter cutting performance. --- Part 2.Shunt method. The purpose is to standardize the test process and requirements of the shunt method. --- Part 3.Static chamber method. The purpose is to standardize the test process and requirements of the static chamber method. --- Part 4.Elution method. The purpose is to standardize the test process and requirements of the elution method. Particle size cutter cutting performance test Part 2.Dividing Methods

1 Scope

This document describes a method for testing the cutting performance of particle size cutters using the split flow method. This document applies to the testing of the cutting performance of the particle size cutter (hereinafter referred to as the "cutter") for air particle sampling.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 6682 Specifications and test methods for water used in analytical laboratories GB/T 13277.1 Compressed air Part 1.Pollutant purification levels GB/T 45322.1-2025 Test for cutting performance of particle size cutters Part 1.General

3 Terms and definitions

The terms and definitions defined in GB/T 45322.1 apply to this document.

4 Principles of the method

The cutter is connected to the diversion pipeline according to the working state requirements, and the particles under different particle size conditions are measured upstream and downstream of the cutter. The cutting efficiency corresponding to different particle sizes was calculated, and the cutting efficiency curve was obtained by fitting. The cutting efficiency was calculated to be 84%, 50% and The cutting particle sizes Da84, Da50, Da16 and geometric standard deviation σg corresponding to 16% are used to test the cutting performance of the particle size cutter. 5.Instruments and Materials 5.1 Instrument 5.1.1 Test system Its composition and performance requirements shall comply with the provisions of Appendix A. 5.1.2 Flow meter The accuracy level should be better than 1.0. 5.1.3 Digital pressure gauge The measuring range is -40kPa~0kPa, and the accuracy level should be better than level 1.0. ......

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