National Standard

National Standard "Efficient Air Filter Performance Test Method Efficiency and Resistance"

The national standard "Efficient Air Filter Performance Test Method Efficiency and Resistance" high-efficiency filter net combines the structure of the sampling tube and the structure of the sampling system into one, and changes the flow time of the oil mist aerosol to the flow rate in the tube. The same flow rate as the test duct;

The method of observing the smoke column state from the optoelectronic fog chamber is increased.

The calculation formula was modified by changing the pass rate test to the efficiency test.

Rewrite the test operation steps;

A new control range is given for the photoelectric oil atomizer with a new light source.

-The main amendments to the sodium flame method are as follows:

(a) The main amendments to the filter section are:

Two modifications were made to the high efficiency air filter sodium flame test device: adding a micrometer to measure absolute pressure in front of the standard orifice plate in the system; The pointer photoelectric measuring instrument in the system was changed to a digital photoelectric measuring instrument, and the relevant content in the "Detection Steps" section was also modified accordingly.

The calculation of filter permeability is changed to efficiency calculation, and the calculation formula is modified.

(b) The main modifications to the filter section are:

The description of the particle size distribution of the aerosol in the sodium flame test was revised to count the median diameter(0.09 ± 0.02) um, while the design size of the aerosol generator was diluted, and the particle size distribution of the aerosol in the test was emphasized;

The flow chart of the test bed of filter sodium flame method was modified. The spray compressed air source is separated from the dry air source, which is more reasonable and more stable and convenient to operate; A hygrometer measuring the relative humidity of the system has been added to the buffer box;

The calculation of transmission rate is changed to efficiency calculation, and the calculation formula is modified.

-- The amendments to the oil fog law are mainly as follows:

(a) The main amendments to the filter section are:

The flow diagram of the test device of spray type oil mist generator is modified as follows: adding microbarometer to measure absolute pressure in front of standard orifice plate in the system; Modification of 190 type turbidimeter to photoelectric fog chamber; Change the type 2-45 turbidimeter to a rate meter; Water pipes for water cooling were removed.

The testable range of the test device has been modified;

Add a rule that the concentration of oil mist is basically unchanged to the fogging parameter.

(b) The main modifications of the filter material are:

The flow diagram of the test device of spray type oil mist generator is modified as follows: the turbidometer 1-90 is modified to photoelectric fog chamber; Change the type 2-45 turbidimeter to a rate meter; Water pipes for water cooling were removed.

The sampling flow rate and clean air flow rate were modified, and the method of observing the smoke state from the optoelectronic fog chamber was increased.

Rewrite the test operation steps;

A new control range for the photoelectric oil atomizer with new light source is given.

The calculation of filter permeability is changed to efficiency calculation, and the calculation formula is modified.

1 Scope

2 Normative reference document

Terminology, definitions, symbols and abbreviations

3.1 Terminology and definitions

3.2 Symbols and Abbreviations

4 Selection of test methods

Test Method for Performance of Efficient and Ultra-Efficient Air Filters

5.1 Sodium flame method

5.2 Fog method

5.3 Counting

6 Test Method for Performance of High and Super High Efficiency Filters

6.1 Test requirements

6.2 Sodium flame method

6.3 Fog Method

6.4 Quasi-single dispersed aerosol counting method(for high efficiency filters)

6.5 Single dispersed aerosol counting method(for ultra-efficient filters)

6.6 Multi-dispersive aerosol counting method(for ultra-efficient filters)

Appendix A(Normative Appendix) Construction and Maintenance of Sodium Flame Filter Test Device

Appendix B(Data Appendix)

Appendix C(Normative Appendix) Construction of Filter Test Device for Oil Fog Method

Appendix D(Data Appendix) Proofreading, Calibration and Maintenance of Oil-Fog Test Devices

Appendix E(Normative Appendix) Vapour in Filter Test Device of Oil Fog Method -- A Cooling Oil Fog Generator

Appendix F(Normative Appendix) Oil Fog Meter

Construction and Maintenance of the Filter Test Device of Appendix G(Normative Appendix) Counting Method

Appendix H(Normative Appendix) Construction and Maintenance of Sodium Flame Filter Test Device

Appendix I(Normative Appendix) Oil Fog Generator in Filter Test Device

High performance air filter performance test method efficiency and resistance This standard replaces GB/T6166-1985 "High performance test method and resistance" and GB/T6165-1985 "High efficiency air filter performance test method penetration rate and resistance".

Compared with GB/T6165-1985 and GB/T6166-1985, this standard mainly changes as follows:

The combined standard name is "High Performance Air Filter Performance Test Method Efficiency and Resistance."

-- The detection methods for high-efficiency filters and filters were increased from two to three in GB/T6165-1985 and GB/T6166-1985. The counting method was added as a new method