Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
SAC/TC 143 is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 14295-2008 Air filters, and the following main technical changes have been made with respect to GB/T 14295-2008:
——Product classification and designation methods are modified;
——The requirements and test methods for the cleaning efficiency for PMx efficiency are added;
——The requirements and test methods for rated power and working voltage of electric air filter are added;
——The requirements for the ozone concentration increment limit of electric air filter are modified;
——The requirements for test instruments are added;
——The requirements for the performance of test devices for air filter are added;
——The test method for electrostatic elimination of air filter is added;
——The requirements for standard test dust for dust holding capacity test of air filter are modified and the dust holding capacity limit is added.
This standard was proposed by the Ministry of Housing and Urban-Rural Development of the People's Republic of China.
This standard is under the jurisdiction of the National Technical Committee on HVAC and Purification Equipment of Standardization Administration of China (SAC/TC 143).
The previous editions of this standard are as follows:
——GB/T 14295-1993 and GB/T 14295-2008.
Air filter
1 Scope
This standard specifies terms and definitions, classification and designation, general requirements, requirements, test methods, inspection rules as well as marking, packaging, transportation and storage of air filters.
This standard is applicable to air filters for ventilation, air conditioning and air purification systems or equipment.
This standard is not applicable to high-efficiency air filters or superior ones.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 1019 General requirements for the package of household and similar electrical appliances
GB/T 1236 Industrial fans - Performance testing using standardized airways
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB 4706.1 Household and similar electrical appliances - Safety- Part 1: General Requirements
GB 8624 Classification for burning behavior of building materials and products
GB/T 18204.2 Examination methods for public places - Part 2: Chemical pollutants
GB 50243 Code of acceptance for construction quality of ventilation and air conditioning works
JG/T 404 Air filter media
3 Terms and definitions
For the purpose of this standard, the following terms and definitions apply.
3.1
air filter
the equipment for removing particulate matters (PMs) in the air by filtration, adhesion, charge trapping, etc.
3.2
electric air filter
a type of air filter for removing the PMs in the air by using dust collection plate to trap the PMs which have been charged by applying high-voltage electrostatic field
3.3
rated air flow
the volume flow of air passing through the air filter in nominal unit time under standard air condition
3.4
face velocity
the ratio of the volume flow rate of air passing through the air filter vertically to the area of the section for ventilation
3.5
initial resistance
the static pressure loss of air filter operating at rated air flow in initial state
3.6
final resistance
a specified static pressure loss value reached by the air filter after increasing due to collection of standard test dust at rated air flow
3.7
particle size
geometrical diameter of PMs measured by optical or aerodynamic equivalent methods
3.8
efficiency
the capacity of air filter for removing PMs in the circulating air at rated air flow, i.e. the ratio of the concentration difference between PMs at the upwind side and downwind side to the concentration of PMs at the upwind side
3.9
counting efficiency
the efficiency of the air filter to remove PMs with particular optical particle size or particle size range in the circulating air at rated air flow
3.10
arrestance efficiency
the efficiency of air filter to remove the standard test dust in circulating air at rated air flow in mass
3.11
cleaning efficiency for PMx
the efficiency of air filter to remove the PMs with aerodynamic equivalent particle size less than or equal to x μm in the circulating air at rated air flow in mass
3.12
dust holding capacity
the total mass of standard test dust collected where the air filter reaches final resistance at rated air flow
3.13
rated power
the input power of electric air filter working at rated air flow in initial state
3.14
working voltage
the ionization voltage and the dust collection voltage of the electric air filter during working in the initial state
4 Classification and designation
4.1 Classification
4.1.1 According to the efficiency level, air filters can be classified into low efficiency filter, medium efficiency filter, high-medium efficiency filter and sub-high efficiency filter, coded as C, Z, GZ and YG respectively. Among them, the low efficiency filters can be classified into low efficiency 1 ones, low efficiency 2 ones, low efficiency 3 ones and low efficiency 4 ones, coded as C1, C2, C3 and C4 respectively. The medium efficiency filters can be classified into medium efficiency 1 ones, medium efficiency 2 ones and medium efficiency 3 ones, coded as Z1, Z2 and Z3 respectively.
4.1.2 According to the structure type, air filters can be classified into flat-plate type, bag type, pleated type, moving curtain type, cartridge type, pole plate type and honeycomb type, coded as PB, DS, ZZ, JR, TS, JB and FC respectively.
4.2 Designation
Example 1: An air filter of medium efficiency 2, bag type, with overall dimension of 592 mm×592 mm×600 mm and rated air flow of 3,400 m3/h, designated as K-Z2-DS-592×592×600-3400.
Example 2: An air filter of low efficiency 3, flat-plate type, with overall dimension of 610 mm×610 mm×80 mm and rated air flow of 2,000 m3/h, designated as K-C3-PB-610×610×80-2000.
Note: The representation principle for overall dimension of filters: with air flow direction as the depth, and the vertical length and the horizontal length of the section perpendicular to the air flow direction as height and width respectively.
5 General requirements
5.1 The application of air filters shall meet the environmental protection and fire resistance requirements of the site.
5.2 Electric air filters shall meet the following requirements:
a) Single-phase rated voltage shall not be greater than 250 V, three-phase rated voltage shall not be greater than 480 V and the rated frequency shall be 50 Hz;
b) Power-off protection shall be arranged to ensure automatic power-off of internal devices during repair or maintenance after opening unit structure;
c) The electrical safety performance shall meet the relevant requirements of GB 4706.1.
5.3 Air filter media shall meet the relevant requirements of JG/T 404.
5.4 The shear strength and tensile strength of binders for air filter shall not be less than those of the media; and the temperature resistance of binders shall be the same as that of the media.
5.5 The sealant for air filters shall be able to ensure that the filters are free from crack and degumming with elasticity during operation at maximum operating air flow or final resistance, and the temperature resistance and humidity resistance of the sealant shall be the same as those of the media.
Foreword I
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and designation
5 General requirements
6 Requirements
7 Test methods
8 Inspection rules
9 Marking, packaging, transportation and storage
Annex A (Normative) Test methods for resistance, counting efficiency and cleaning efficiency for PMx of air filter
Annex B (Normative) Test methods for arrestance efficiency and dust holding capacity of air filter
Annex C (Normative) Test method for electrostatic elimination of air filter
Annex D (Normative) Test method for ozone concentration increment of electric air filter
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
SAC/TC 143 is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 14295-2008 Air filters, and the following main technical changes have been made with respect to GB/T 14295-2008:
——Product classification and designation methods are modified;
——The requirements and test methods for the cleaning efficiency for PMx efficiency are added;
——The requirements and test methods for rated power and working voltage of electric air filter are added;
——The requirements for the ozone concentration increment limit of electric air filter are modified;
——The requirements for test instruments are added;
——The requirements for the performance of test devices for air filter are added;
——The test method for electrostatic elimination of air filter is added;
——The requirements for standard test dust for dust holding capacity test of air filter are modified and the dust holding capacity limit is added.
This standard was proposed by the Ministry of Housing and Urban-Rural Development of the People's Republic of China.
This standard is under the jurisdiction of the National Technical Committee on HVAC and Purification Equipment of Standardization Administration of China (SAC/TC 143).
The previous editions of this standard are as follows:
——GB/T 14295-1993 and GB/T 14295-2008.
Air filter
1 Scope
This standard specifies terms and definitions, classification and designation, general requirements, requirements, test methods, inspection rules as well as marking, packaging, transportation and storage of air filters.
This standard is applicable to air filters for ventilation, air conditioning and air purification systems or equipment.
This standard is not applicable to high-efficiency air filters or superior ones.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 1019 General requirements for the package of household and similar electrical appliances
GB/T 1236 Industrial fans - Performance testing using standardized airways
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB 4706.1 Household and similar electrical appliances - Safety- Part 1: General Requirements
GB 8624 Classification for burning behavior of building materials and products
GB/T 18204.2 Examination methods for public places - Part 2: Chemical pollutants
GB 50243 Code of acceptance for construction quality of ventilation and air conditioning works
JG/T 404 Air filter media
3 Terms and definitions
For the purpose of this standard, the following terms and definitions apply.
3.1
air filter
the equipment for removing particulate matters (PMs) in the air by filtration, adhesion, charge trapping, etc.
3.2
electric air filter
a type of air filter for removing the PMs in the air by using dust collection plate to trap the PMs which have been charged by applying high-voltage electrostatic field
3.3
rated air flow
the volume flow of air passing through the air filter in nominal unit time under standard air condition
3.4
face velocity
the ratio of the volume flow rate of air passing through the air filter vertically to the area of the section for ventilation
3.5
initial resistance
the static pressure loss of air filter operating at rated air flow in initial state
3.6
final resistance
a specified static pressure loss value reached by the air filter after increasing due to collection of standard test dust at rated air flow
3.7
particle size
geometrical diameter of PMs measured by optical or aerodynamic equivalent methods
3.8
efficiency
the capacity of air filter for removing PMs in the circulating air at rated air flow, i.e. the ratio of the concentration difference between PMs at the upwind side and downwind side to the concentration of PMs at the upwind side
3.9
counting efficiency
the efficiency of the air filter to remove PMs with particular optical particle size or particle size range in the circulating air at rated air flow
3.10
arrestance efficiency
the efficiency of air filter to remove the standard test dust in circulating air at rated air flow in mass
3.11
cleaning efficiency for PMx
the efficiency of air filter to remove the PMs with aerodynamic equivalent particle size less than or equal to x μm in the circulating air at rated air flow in mass
3.12
dust holding capacity
the total mass of standard test dust collected where the air filter reaches final resistance at rated air flow
3.13
rated power
the input power of electric air filter working at rated air flow in initial state
3.14
working voltage
the ionization voltage and the dust collection voltage of the electric air filter during working in the initial state
4 Classification and designation
4.1 Classification
4.1.1 According to the efficiency level, air filters can be classified into low efficiency filter, medium efficiency filter, high-medium efficiency filter and sub-high efficiency filter, coded as C, Z, GZ and YG respectively. Among them, the low efficiency filters can be classified into low efficiency 1 ones, low efficiency 2 ones, low efficiency 3 ones and low efficiency 4 ones, coded as C1, C2, C3 and C4 respectively. The medium efficiency filters can be classified into medium efficiency 1 ones, medium efficiency 2 ones and medium efficiency 3 ones, coded as Z1, Z2 and Z3 respectively.
4.1.2 According to the structure type, air filters can be classified into flat-plate type, bag type, pleated type, moving curtain type, cartridge type, pole plate type and honeycomb type, coded as PB, DS, ZZ, JR, TS, JB and FC respectively.
4.2 Designation
Example 1: An air filter of medium efficiency 2, bag type, with overall dimension of 592 mm×592 mm×600 mm and rated air flow of 3,400 m3/h, designated as K-Z2-DS-592×592×600-3400.
Example 2: An air filter of low efficiency 3, flat-plate type, with overall dimension of 610 mm×610 mm×80 mm and rated air flow of 2,000 m3/h, designated as K-C3-PB-610×610×80-2000.
Note: The representation principle for overall dimension of filters: with air flow direction as the depth, and the vertical length and the horizontal length of the section perpendicular to the air flow direction as height and width respectively.
5 General requirements
5.1 The application of air filters shall meet the environmental protection and fire resistance requirements of the site.
5.2 Electric air filters shall meet the following requirements:
a) Single-phase rated voltage shall not be greater than 250 V, three-phase rated voltage shall not be greater than 480 V and the rated frequency shall be 50 Hz;
b) Power-off protection shall be arranged to ensure automatic power-off of internal devices during repair or maintenance after opening unit structure;
c) The electrical safety performance shall meet the relevant requirements of GB 4706.1.
5.3 Air filter media shall meet the relevant requirements of JG/T 404.
5.4 The shear strength and tensile strength of binders for air filter shall not be less than those of the media; and the temperature resistance of binders shall be the same as that of the media.
5.5 The sealant for air filters shall be able to ensure that the filters are free from crack and degumming with elasticity during operation at maximum operating air flow or final resistance, and the temperature resistance and humidity resistance of the sealant shall be the same as those of the media.
Contents of GB/T 14295-2019
Foreword I
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and designation
5 General requirements
6 Requirements
7 Test methods
8 Inspection rules
9 Marking, packaging, transportation and storage
Annex A (Normative) Test methods for resistance, counting efficiency and cleaning efficiency for PMx of air filter
Annex B (Normative) Test methods for arrestance efficiency and dust holding capacity of air filter
Annex C (Normative) Test method for electrostatic elimination of air filter
Annex D (Normative) Test method for ozone concentration increment of electric air filter
