Views:0 Author:Site Editor Publish Time: 2021-11-12 Origin:Site
Implementation on February 01, 2021
This standard specifies the classification and tag, materials, structural and production environment, technical requirements, test methods, inspection rules, logos, packaging, and transportation of high efficiency air filters and ultra-efficient air filters (hereinafter referred to as \"filters \"). And storage, etc.
This standard applies to filters for air and exhaust purification systems and equipment under normal temperature conditions.
2 normative reference file
The following documents are essential for this application. Any reference file that is noted, only the date of the date is applied to this document. Any reference file that does not end date is compared to the new version (including all modifications) for this purpose.
GB / T 191 Packing Storage and Transport icon.
GB / T 531.1 Vulcanized rubber or thermoplastic rubber pressure hardness test Method Part 1: Shaw's hardness gauge (Shaore hardness)
GB / T 3274 carbon structure steel and low alloy structure steel hot rolled steel plate and steel strip
GB / T 3280 stainless steel cold rolled steel plate and steel strip
GB / T 3880.1 General industrial aluminum and aluminum alloy plate, strip Part 1: General requirements
GB / T 3880.2 General industrial aluminum and aluminum alloy plate, strip Part 2: Mechanical properties
GB / T 4857.23 Basic Tests of Packaging Transportation Packaging Parts Part 23: Random Vibration Test Method
GB / T 6165 high efficiency air filter performance test method efficiency and resistance
Determination of compression deformation of GB / T 6669 soft foam polymerization
GB 8624 Building Materials and Products Combustion Properties
Determination of Paper and Cardboard Tensile Strength (20mm / min)
JG / T 404 air filter filter material
3 terms, definitions, and abbreviations
3.1 Terms and Definitions
GB / T 6165 defined and the following terms and definitions apply to this document.
3.1.1 High Efficiency Air Filter High Efficiency Particulate Air Filter; HEPA
Used for air filtration and using GB / T6165 specified by GB / T6165, the filtration efficiency at the time of unplete static electricity treatment is not less than 99.95% of the filtration efficiency after the rated air volume.
3.1.2 Ultra High Efficiency Air Filter Ultra Low Penetration Air Filter; ULPA
It was used for air filtration and the calculation of the counting method specified in GB / T6165 was used to test the filtration efficiency and the filtration efficiency at the time of retaining atmosphere and the filtration efficiency after the static electricity treatment were not less than 99.99%.
3.1.3 Efficiency EffICIENCY
When the filter element is tested, the amount of aerosol containing the filtration element is filtered off with the amount of aerosol before the filtration.
3.1.4 Transmission rate PENETRATION
When the filter element is tested, the ratio of aerosol concentration after filtration element is filtered to the concentration of aerosol concentration before the filtration.
3.1.5 Having a separator filter Separator-Style Filter
Filtering the filter material is folded by the desired depth, and the folded filter is supported between the corrugated separator to form a filter of the air passage.
3.1.6 Unexlate filter MINIPLEAT-STYLE FILTER
The filter material is folded into the filter core, and the filter material is supported by a linear binder or other separator to form a filter of the air passage between the filtrate.
3.1.7 Rated air volume Rated Air FlowRate
The technical parameters of the filter work ability are identified, indicating that the unit time of the filter efficiency is relatively large air volume flow. Note: The rated air volume is provided by the filter manufacturer.
It must be tested under the condition of wind speed or air volume, the static pressure before and after the filter element. For the filter, the static pressure difference between the filters under the rated air volume.
3.1.9 Initial Resistance
The filter is cleaned and the resistance in the initial state of any treatment.
3.1.10 Test end resistance Final Test Resistance
When the method of lifecycle is performed by the method specified in this standard, the determination is the resistance to the filter element of the test termination condition.
3.1.11 end resistance Final Resistance:
The filter is trapped during use, and the specified resistance should be made when the filter is replaced.
3.1.12 Integrated Resistance Comprehensive Average Resistance
The weighted average resistance of the filter element obtained when the lifecycle integrated energy efficiency test was performed as specified in this standard.
3.1.13 Conditions Dust Loading Capacity
When the method specified in this standard, the test filter element reaches the weight loss when the test final resistance is prescribed.
The following abbreviations apply to this document.
Dehs: di octyl sebacate
PAO: poly alpha olefin
PSL: Polystyrene Latex Ball
4 classification and tag
4.1 Classification by Structure
Press the filter filter structure to be divided into a partition filter and a non-barrier filter, and the schematic is shown in Figure 1.
1, filter material;
Figure 1 Schematic diagram of the structure of the separator filter and the non-separator filter
4.2 Classification by efficiency level
4.2.1 Efficient Air Filter
The filter filtering efficiency is detected by the method specified in GB / T 6165, and the efficient air filter can be divided into 35, 40, 45.
4.2.2 Ultra High Efficiency Air Filter
The filter filtering efficiency is detected by the counting specified in GB / T 6165, and the ultra-efficient air filter can be divided into 50, 55, 60, 65, 70, 75.
The filter mark is shown in Figure 2, and the model specification code is shown in Table 1. See Appendix A for common specifications.
Figure 2 Filter mark
Table 1 Filter Specifications Code
Example 1: The high-efficiency air filter with a separator, the efficiency level is 40, the efficiency test method is a sodium flame method, using a non-scanning method for leak detection, the shape size is 484 mmx484 mmx220 mm, the rated air volume is 1000 m3 / h, mark For; GY-40-N-484X 484 x 220-1000.
Example 2: No cross-high efficiency air filter, efficiency level is 65, efficiency test method is a counting method, using scanning method for leak detection test, the outer dimensions are 610 mmx1220 mmx 80 mm, the rated air volume is 2400 m3 / h, mark To: CGW-65-JS-610x1 220x 80-2400.
5 material, structure and production environment
5.1.1 Basic requirements
Fire prevention performance should comply with the fire prevention requirements of its application environment, and the materials used should maintain performance and do not have dust. When there is corrosion resistance, the materials used should have corresponding anti-corrosion resistance.
126.96.36.199 The transmittance and resistance of filter materials shall comply with the performance requirements of similar filter filters in this standard.
188.8.131.52 Filter paper tensile strength determination shall comply with GB / T 12914, and its longitudinal tensile strength should not be less than 0.7 kN / m, and the lateral tensile strength should not be less than 0.5 kN / m.
184.108.40.206 Filtering material at (3.5 ± 0.2) KPa pressure should not exceed 0.40 mm, and should be uniform and uniform, and the surface of the filter material should not have cracks, scratches, pinholes and salts.
220.127.116.11 The release properties of filter materials should meet the special requirements of the application environment.
18.104.22.168 Other properties of filter materials shall comply with the relevant provisions of JG / T 404.
22.214.171.124 Border materials should have the strength and stiffness of the requirements, and the material thickness should be selected according to the material and the edge length.
126.96.36.199 When using the following materials, it should comply with relevant standard requirements, and corresponding anti-rust or anti-corrosion measures should be taken:
The cold rolled steel sheet should comply with GB / T 3274, the thickness should be 1.0 mm ~ 2.0 mm, zinc-plated, sprayed or take other rust measures after molding.
The aluminum alloy plate should comply with the provisions of GB / T 3880.1 and GB / T 3880.2, and the thickness should be 1.5 mm ~ 2.0 mm;
The stainless steel sheet should comply with the provisions of GB / T 3280, and the thickness should be 1.0 mm to 2.0 mm.
188.8.131.52 When the application environment has special requirements, other materials that meet the requirements should be selected.
5.1.4 Splitting Board and Separators
A partition plate having a separator filter can be aluminum foil or the like; a separator having a separator filter can be used for glass fiber paper. The partition material should comply with the relevant standards.
5.1.5 Binder and Sealant
184.108.40.206 The binder is used for the splicing, repair and bonding of the seal and the frame, and the shear strength and tension strength should be higher than the corresponding value of the filter material.
220.127.116.11 Sealants For the seal of the filter element and the frame, it should be cured at normal temperature, normal pressure, and should ensure that the filter does not crack when operating under final resistance conditions, and has elasticity.
18.104.22.168 The fire resistance of the binder and sealant should meet the requirements of the application environment, and the release properties should meet the special requirements of the application environment.
22.214.171.124 Sealed pad should be used in elastic and non-aging closed-hole materials, which should meet the provisions of GB / T 531.1, and the hardness measured by the Shaoe AO hardness meter should be 28 ± 5.
126.96.36.199 According to the relevant provisions of GB / T 6669, the sealing pad compression deformation should not be more than 60% (60%, 22 h, 70 ° C).
188.8.131.52 The release properties of the gasket should meet the requirements of special applications.
5.1.7 Protective Network
The protective net can be used in stainless steel plate, a punched plate, a spot welding galvanized wire, spot welding stainless steel wire and spray steel sheet.
184.108.40.206 has a separator filter filter
When the filter is fixed in the frame, the partition plate should expose the filter pleats 3 mm ~ 5 mm, and the frame end face 5 mm to 8 mm is zoomed.
220.127.116.11 No block filter filter
When the filter is fixed in the frame, the filter and the separator should be subjected to the frame end surface 3 mm to 5 mm.
18.104.22.168 Border structure should be strong and should have sufficient rigidity and overall stability.
22.214.171.124 Border Flat corners and splices should not loose, binder and sealing adhesive should not be deacidized, crackled, and filter materials should not loosen and deformed in the border.
126.96.36.199 Border edge width should be 15mm to 20 mm. The frame border width should be 20 mm from a filter that is not less than 600 mm long.
5.2.3 Sealing Cushion
188.8.131.52 Sealed cushions should be used as rectangles (width should be greater than 15 mm and should not exceed the border, the thickness should be 5 mm ~ 8 mm) or semi-circular (15 mm in diameter), the adhesive surface of the rectangular section tile The sealing surface should be peeled.
184.108.40.206 Sealed Cat should be integrated or spliced, stitching should be at the corner, and it is advisable to use an omega-type or dove-type connection method, and the joint should be firmly bonded. The splicing of the entire seal should not exceed 4.
220.127.116.11 Seals and borders should be bonded firmly, and the inside and outside edges of the gasket should not exceed the inside and outside of the border.
5.2.4 Liquid trough seal
The performance of the non-Newtonian fluid sealing material used in the liquid tank sealing should be guaranteed that no effort is not abortion and flexible at the working temperature. The height of the tool should match the depth of the liquid slot, the knife opening, the liquid groove depth should be determined according to the surface wind speed and filter final resistance at the time of use.
5.2.5 Filter material stitching and repair
18.104.22.168 Filters splicing joints per spaceboard high-efficiency air filter should not exceed 1; the filter material of the super efficient filter should not be spliced
22.214.171.124 When the two filter materials are spliced with a lap method, the lap width should not be less than 13 mm.
126.96.36.199 The lap interface should not be placed at the render of filter material folding.
188.8.131.52 Each patch area should not exceed 20 mmx20mm, and the total area of the repair should not exceed 1% of the net area of the filter.
5.3 production environment
The production environmental conditions of the filter should ensure that the filter has a whole process (to the box) is not contaminated. The air cleanliness level in the high-efficiency air filter assembly workshop is preferably level 8, and the air cleanliness level in the ultra-efficient air filter assembly workshop is preferably 7.
6 technical requirements
6.1.1 The surface of the filter should not have pollutants and damage such as mud, oil, viscosity, and should not appear in the frame unevenness, twist or rupture; the surface coating layer should not be uneven and peel off.
6.1.2 Filter materials, separators, and protective networks should have no deformation, and the sealing pad should be unexpected.
6.1.3 Sealed plascene should be completely free of cracks, and the water absorbing is not more than 5 mm along the filter material and the separator.
6.2 Dimensional deviation
6.2.1 Side of the filter having a filter, the end surface size deviation should be (0, -3.2) mm; the side length is not more than 500 mm filter, and its end surface size deviation should be (0, -1.6) mm.
6.2.2 Deviation of the filter depth size should be (+1.6, 0) mm
6.2.3 When the diagonal length of the filter is greater than 700 mm, the deviation of the difference between the two diagonal lines of each end surface should not be more than 4.5mm; when the filter diagonal length is not more than 700 mm, its deviation should not be greater than 2.3 mm.
6.2.4 The end face of the frame should be perpendicular to the side, and its verticality deviation should not be more than ± 3 °.
6.2.5 Filter end face and side plate flatness should not be more than 1.6 mm; the parallelism deviation of both ends should not be more than 1.6 mm.
6.2.6 The partition plate with the separator filter cartridge should be parallel to the centerline of the frame, and the partition plate and the centerline tilt deviation should not be more than 6 mm, and the mutant deviation should not occur. The pleats of the filter material and the separator should be perpendicular to the upper and lower end plates of the frame, from one end of any pleated or partition plate, the pallet or the other end of the partition is deviated from lead vertical lines should not be more than 9 MM. Pleated and partitioning plates should not be bent, connecting from both ends of any pleated or partition plate, and the deviation caused by the bend should not be more than 6 mm.
6.2.7 No diaphragm filter filter The adjacent pleat height deviation should not be more than 0.5 mm. The straightness deviation of the 300mm endonition should be no more than 1 mm. The separator should be perpendicular to the pleats, and the verticality deviation of the straight line and the pleats formed by each partition should be no more than 2 mm; the deviation of the split spacing should not be more than 3 mm.
6.3.1 The high-efficiency air filter shall be leaking and leakage shall not be leakage.
6.3.2 Ultra-high-efficiency air filters shall be used to perform leak detecting by a scanning method, and should not be leakage.
The filter efficiency should comply with the provisions of Table 2 and Table 3.
Table 2 Efficient air filter efficiency
Table 3 Ultra High Efficiency Air Filter Efficiency
For filter load filters, it should be nominally tapped with filtration efficiency after elimination, and the measured value should not be less than 90% of the nominal value.
The initial resistance under the amount of the filter should not be more than 105% of the nominal value.
6.7 filter tightness
The position of the wood block placed on the filter element should not be more than 3.2 mm.
After the filter is detected by vibration, it should comply with the provisions of 6.1 to 6.5.
6.9 fire prevention performance
When the filter application environment has fire prevention performance requirements, the overall fire protection performance of the filter should comply with the relevant provisions in GB 8624.
6.10 Lifecycle Conditions and Comprehensive Efficiency
High-efficiency filtration materials and filter dust, and comprehensive efficiency of life cycle, and integrated resistance tests, and high-efficiency filtration materials are not less than 90% of the nominal value, and 90% of the nominal value of 90% of the nominal value. The deviation of the comprehensive average efficiency value and the nominal value of the nominal value should not be greater than 5, and the integrated average resistance should not be more than 110% of the nominal value.
7 test method
The appearance can be visually inspected. The sealed adhesive infiltration should be used to use a steel sheet, and its index value should be no more than 1 mm.
7.2 Dimensional deviation.
7.2.1 Dimensional deviation shall be carried out on a stable and flat horizontal workbench.
7.2.2 Length should be used to check the length of steel, and its index value should be no more than 1 mm.
7.2.3 Plate and plugging should be used in flatness, the flattened accuracy should be 3, and the plug is 0.02 mm to 0.50 mm.
7.2.4 Verticalness should use angle syndrome, its degree value should not be more than 0.5 °.
7.3.1 High-efficiency air filter Leak detects can be carried out in accordance with the appendix B or see the provisions of Appendix C, the reference method is the method specified in Appendix B. Ultra-efficient air filter leak detects should use the counting scanning method specified by Appendix B.
7.3.2 Scanning Explosives Experiments Discovery Discovery can be repaired, and it should comply with the provisions of 5.2.5. After the repair is completed and the sealing glue is sufficiently cured, the filter will respond to the filter again.
7.4.1 Before the efficiency test, the filter should be carried out under the rated air volume until the filter itself has evolved in efficiency testing.
7.4.2 Efficiency under the rating of high efficiency air filters should be determined according to the method specified in GB / T6165.
7.4.3 The efficiency of the rating of ultra-efficient air filters should be determined according to the counting method specified in GB / T 6165.
The elimination test should be carried out in accordance with the method specified in Appendix D. After the static electricity treatment, the efficiency test should be performed in accordance with the requirements of 7.4, and the efficiency test method should be in the efficiency test method of the filler factory inspection.
The resistance test should be carried out according to the method specified in GB / T 6165.
7.7 filter tightness
The assembled filter is assembled. Place it on the platform. Adhesive a 102 mmx152 mm on the back of the wooden block with a wooden block, a closed pore sponge chlorine-bonenut rubber, and the surface of the adhesive rubber is placed on the center of the filter filter, so that one side of 152 mm is full of filter Walking. The front of the wooden block is placed on a 2.7 kg of weight, and the force applied (15.7 ± 0.9) n at the center of the wood block, which is parallel to the filter end surface and is perpendicular to the filter material pleats. The displacement produced by the original position after measuring the bias.
Filters that meet 6.1 to 6.5 shall be performed according to the method specified in GB / T 4857.23. The filter after vibration test should be retrieved in accordance with 6.1 ~ 6.5 requirements.
7.9 fire prevention performance
Fire prevention performance test should be carried out according to the method specified in GB8624.
7.10 Lifecycle Conditions and Comprehensive Efficiency
8 inspection rules
8.1 inspection classification
8.1.1 Factory Test
Each product shall be factory inspected, and the factory inspection should be carried out in accordance with the items set forth in Table 4.
Table 4 Filter inspection project
8.1.2 Type test
184.108.40.206 When the filter has the following cases, a type test should be performed:
a) Trial styling identification of new products or old products
b) Changes of product structures, manufacturing processes and materials, may affect product performance;
c) After the product is suspended for more than one year, it will restore production;
d) When the factory inspection results are greatly different from the last type inspection;
e) When mass production is produced, it should be carried out every two years.
220.127.116.11 Type test shall be carried out in accordance with the items set forth in Table 4.
18.104.22.168 Type inspection Sampling method is: Extracted in qualified products provided by the manufacturer, 3 units should be pumped in the same batch, more than 100 sets.
8.2 Judgment Rule
8.2.1 Factory Test
The second item is unqualified or any of the main items should be determined as unqualified products, otherwise it should be judged as qualified products.
8.2.2 Type test
The second item is unqualified or any of the main items should be determined as unqualified products, otherwise it should be judged as qualified products.
9 logo, packaging, transportation and storage
Each filter should have a marker (label or direct print body) in the outer frame surface perpendicular to the pleats and the separator. The logo should be firmly fixed to the outer frame of the filter, it should be clear, it is not easy to scrub, and at least the following is included:
a) the name and symbol of the manufacturer;
b) Filter model, specification size and factory number;
c) Rated air volume, in \"m3 / h \";
d) Efficiency or transmittance under rated air volume, and indicate its detection method;
e) whether it passes the experiment;
f) the initial resistance under the rated air volume, in \"pa \";
g) indicate the arrow in the airflow direction;
h) Products (test) date;
i) product certificate.
9.2.1 Product packaging should be in loading and unloading, transportation, handling, and storage until the user is installed before the installation is caused by damage and destruction caused by external force.
9.2.2 Packing pre-filters should be mounted in a plastic bag, and the airflow direction section of the filter should increase cardboard protection, and the outer box can be used with cardboard. On the box, the model, the name, the name, and quantity consistent with the packaged filter should be indicated, and should be indicated by the provisions of GB / T 191, with text or sign, \"Be careful,\" \"is afraid of wet \"\" Up \"and the pile code limit.
9.3.1 During transportation, the filter should be placed in the package on the box, and the stacking height should not exceed 3 layers or use a tray, which is not suitable for mixing other goods.
9.3.2 Filters should take fixed measures in transportation, and when the fixture across the cabinet folding angle, the fixture should be separated from the cabinet to protect the cabinet.
9.3.3 In the loading and unloading or handling process, the operator should take a safe measures to prevent the filter slip from the transfer process.
9.4.1 Filters should be stored in a clean and well ventilated environment, should not be stacked.
9.4.2 Storage The application pad is separated from the ground to prevent the filter from being tidy.
9.4.3 Filters should be placed in accordance with the box sign, and the stacking height should not exceed 3 layers or the tray.
9.4.4 Filters stored more than 3 years should be re-factory test.
High-efficiency air filter common specifications model
A.1 This appendix gives the common filter size and reference stains in the general application environment.
A.2 Some application industries specify that the filter is 0.45m / s using the filter, and the air volume can be calculated according to the surface wind speed and filter cross-sectional size.
A.3 Common specifications of the partition filter are shown in Table A.1.
Table A.1 has a space-purpose specification sheet with a partition filter
A.4 Non-barrier filter common specifications are shown in Table A.2.
Table A.2 No block filter common specification sheet
High efficiency air filter scanning test method
B.1 count scanning method
B.1.1 Test device
B.1.1.1 Filter count scanning method Leak detection test table shows shown in Figure B.1.
Figure B.1 Counting scan method leak detect stage show
B.1.1.2 Test bench sealing, air volume stability, upstream sampling cross-section wind speed, concentration uniformity index should comply with relevant regulations of GB / T 6165.
B.1.2 Test aerosol
B.1.2.1 The test can choose a liquid oily aerosol (such as DEHS, PAO, paraffin oil, etc.) or solid aerosol (such as a sufficiently dried PSL, NaCl.kcl, et al.). Test aerosols should be non-toxic and harmless, in line with environmental protection and occupational health regulations.
B.1.2.2 When the test aerosol and test counter is partially compliant with the relevant provisions of GB / T 6165, the overall filtration efficiency of the test filter can be calculated by the filter downstream cumulative count during the scan.
B.1.2.3 Test aerosol stability The total particle concentration fluctuation of the particle size of 30 min is not more than 10% of the test particle size.
B.1.2.4 During the test, the test aerosol count concentration should not be more than 1x107 capsules per centimeter.
B.1.3 Test Instrument
B.1.3.1 Leak detects can be carried out based on the single-dispersion characteristics of the test aerosol or perform the coagulation core counter or the optical particle counter. The instruments used should regularly calibrate calibration, calibration cycle and calibration methods should comply with national relevant standards and verification procedures.
B.1.3.2 When performing a leak detection test using an optical particle counter, a comparison of small particle gear gear of the counter should not be selected.
B.1.3.3 When calculating the overall filtering efficiency of the test filter according to the leak detect results, the selection of the particle size should comply with the relevant provisions of GB / T6165.
B.1.4 Scanning System
B.1.4.1 Scan detection method
Filter manufacturers can choose to automatically scan mechanisms, or select the manual manual scanning method for filter scanning detection test. Automatic scan detection mode should be used when calculating the overall filtering efficiency of the test filter according to the scanning test results and the ultra-efficient air filter.
B.1.4.2 Downstream Sampling Probe
B.22.214.171.124 The opening area of the sampling probe should be 8 cm2 to 10 cm2, and the shape should be a square. When using a rectangular probe, the ratio of the edge should not exceed 15: 1. When selecting the sampling flow of the probe, it should ensure that the flow rate of the probe is not more than 25% of the flow rate and the filter surface of the filter.
B.126.96.36.199 The direction of the probe should be parallel to the airflow direction, and the surface distance of the probe is from 1 cm to 5 cm.
B.1.4.3 Gas solve conveyor
The aerosol delivery tube should not be bent along the way. The pipeline material should be smooth, and the particles should not be distributed.
B.1.4.4 Scan Probe Drive Control
B.188.8.131.52 The scan probe should be moved in a direction perpendicular to the airflow, and the movement speed of the probe should not exceed 8 cm / s.
B.184.108.40.206 The deviation of the actual walking speed and set value of the probe of the automatic scanning mechanism should not exceed 10%. The automatic scanning mechanism should be able to locate and mark the coordinates and detected drain points during the movement of the probe movement, and the probe mechanism is in the filter downstream, and the return is not more than 1 mm.
B.1.5 Isolation measures
The downstream of the test filter should be isolated from the surrounding environment, and clean air can be used as a protective case gas, or by means of semimilation.
B.1.6 Test Procedure
B.1.6.1 Install the test filters on the test bench and make sure the seal. Start the test typhoon, adjust the test air volume to the quantity of the test filter.
B.1.6.2 When the aerosol generator is not opened upon the test filter, check whether the optical particle counter used can be self-cleaned.
B.1.6.3 Introducing a test aerosol upstream of the test filter, in confirmation. The upstream gas sol concentration is stably tested for the test of the upstream aerosol concentration Cu.
B.1.6.4 Scan the width of the probe according to the optical particle counter used, and determine the upper limit of the scan speed (B.1):
Table B.1 Filter Local Transmission Allow Limits
B.1.6.5 Manually or by driveing the scan probe by the automatic scanning mechanism to scan detection of the filtered surface and the filter connection with the mounting frame connection with the installation frame connection without exceeding the upper limit of the scanning speed. If the upstream test aerosol concentration is sufficiently large, any region where the counter causes the counter generates not less than NP during the scanning process will be determined as a drain point. When the NP is less than 20 capsules, any area that causes the counter causes the counter generates not less than NP to be marked as \"suspected drain point \", and the scan probe should be fixed at a certain time (such as not less than 20). s) Perform a fixed point leak detection. The counter is desired by the counter-leakage point determination of the missing point leakage process, the fixed point test time, and the actual observation limit should be determined by the formula (B.2) and the equation (B.3):
B.2 photometer scanning method
B.2.1 Test device
Test devices suitable for photometric scanning methods should comply with B.1.1.
B.2.2 Test aerosol
The test aerosol should be an oily aerosol substance (such as PAO, DEHS, etc.) that occur in one or more Laskin nozzles. The Laskin nozzle working pressure should be 133 kPa, and the quality of the aerosol of the aerosol should be 0.7 μm, and the geometric standard difference should not be greater than 1.80.
B.2.3 Test steps
B.2.3.1 Install the test filters on the test bench and ensure sealed. Start the test typhoon, adjust the test air volume to the quantity of the test filter.
B.2.3.2 Start the aerosol generator, adjust the number of parameters such as the number of generator nozzles, adjust the upper gas sol concentration to 10 mg / mg / mg / m3, measure the upstream concentration using an aerosol spot meter, and set it Full amount for the photometric.
B.2.3.3 Make the photointenzance to clean the dust air, set zero.
B.2.3.4 Switch to the downstream sampling, use the scan probe to perform a scanning leakage test at the air side surface 1 cm ~ 5 cm from the protrudic filter.
B.2.3.5 During the scanning process, the scanning speed of the square scan probe should not be more than 5 cm / s, the area scanning speed of the rectangular scan probe should not be more than 15.5 cm2 / s.
B.2.3.6 In addition to the two sides of the test, the area of the local transmittance exceeds 0.01% is determined as leakage defects.
B.3 Test Report
The content of the test report should include at least the following:
a) Try filter information: Specification model, level, factory number, or other only-sex identity, size, rated air volume
b) Test aerosol name;
c) Test equipment: Specification model, factory number or other identifier;
d) Sampling probe: probe shape and size, probe moving speed, etc.
e) Test conditions: Temperature and relative humidity of the test air;
F). Upper reaches of sol concentration and local leakage defect determination limit;
g) Comprehensive judgment conclusions for qualified test results;
h) Filter repair
Other leak detecting methods for high efficiency air filters
C.1 Smoke test
C.1.1 Put the filter horizontally on the air outlet, seal it, with an aerosol generator having a mass average diameter of 0.3 μm to 1.0 μm, and the mass concentration should be 1.5 g / m3 aerosol smoke. The gas-containing gas stream flows upward by a temperature of 1.3 cm / s.
C.1.2 Light vertical irradiation of the filter out of the wind surface, the filter is around and the viewing background is dark, and the interference airflow around the filter is shielded.
C.1.3 Observing the wind surface, if there is a lotion, it is determined that there is a leak, and it is not seen that there is no leakage.
C.2 Double air volume efficiency test
C.2.1 For a special shape filter that is not suitable for scanning leakage tests such as a circular simple, W-type, and the double air volume efficiency test can be used to determine whether the filter has local leakage defects.
C.2.2 Install the test filter on the test bench conforming to the GB / T 6165, and the filtering efficiency test of 100% rated air volume and 20% rated air volume shall be carried out according to the provisions of GB / T 6165.
C.2.3 If the ratio of the detected filter is less than 0.1 in the amount of 20% rated air and 100% rated air volume, it is determined that the test filter is determined. There is a local leakage defect.
High-efficiency air filter elimination static test method
D.1 test principle
This appendix specifies the test apparatus and test method for electrostatic elimination processing using isopropanol saturated vapor on filter charge charge.
D.2 duisstream material
D.2.1 Eliminate and neutralize the filtrate of the filtrate by isopropanol saturated vapor.
D.2.2 The isopropyl alcohol solution with no less than 99.5% is used in electrostatic elimination of natural volatilization, producing isopropyl alcohol saturated vapor.
D.3 Electrostatic elimination cabinet
D.3.1 Electrostatic elimination cabinets shall be made of stainless steel or galvanized steel plate.
D.3.2 Electrostatic elimination cabinets contain one filter cabin, 1 or 2 alcohol trays storage compartment, each cabin, to stand independent door. The filter cabin and the isopropyl alcohol tray should have a gas flow channel to facilitate air and isopropanol saturated vapor to maintain a balance within the entire static elimination cabinet space.
D.3.3 The filter cabine of the electrostatic elimination cabinet should be installed with a filter that is more than 610 mmx610 mmx292 mm, and the filter should not contact the inner surface of the electrostatic elimination cabinet.
D.3.4 Electrostatic elimination cabinets Total free evaporation area should not be less than 1.0 m2
D.3.5 In order to prevent isopropanol saturated vapor leakage to affected personnel and environment, the electrostatic elimination cabinet should satisfy the following conditions: under +200 Pa pressures, the attenuation of the static electric elimination cabinet 1 min should not be more than 30 Pa .
D.4 Test Conditions
D.4.1 The room temperature in the electrostatic elimination cabinet should be controlled at (25 ± 5) ° C, the relative humidity should be controlled (40 ± 20)%.
D.4.2 Filter constant weight weather conditions and test air temperature should be controlled at (23 ± 5) ° C, relative humidity should be controlled at (45 ± 10)%.
D.5 Test Method
D.5.1 The test air filter should be placed at least 30 min in the test air, followed by weight, accurate to 1 g. Press the method specified by GB / T 6165 to test the filtering efficiency and resistance of the initial state at the time of unsupportion, the efficiency test method should be consistent with the fuses nominal product efficiency test method.
D.5.2 Type isopropyl alcohol tray note is not less than 99.5% isopropanol solution, and weigh the tray, accurate to 1 g. D.5.3 Put the tray containing the isopropyl alcohol solution in the static elimination cabinet, close the door and wait for 30 min.
D.5.4 Open the electrostatic elimination cabinet filter cabin door, quickly release the test air filter, then close the cabinet door.
D. 5.5 Render the static test, exposes the test filter to isopropyl alcohol saturated vapor and air mixing gas 24 h. The temperature and humidity in the room should be recorded every 1h during the test.
After D.5.6 reaches the elongular time, open the door and quickly remove the test filter, then turn off the door; remove the isopropanol tray and weigh to determine the evaporation of the isopropyl alcohol solution.
D.5.7 Press the test filter to balance at least 30 min in the test air, and carry out the filtering efficiency and resistance according to the method specified in GB / T 6165, the efficiency test method should be a factory efficiency test method Consisten to the test air filter 10 min with dry cleansing air, tested the filtering efficiency again. When the diameter of the filtration efficiency is greater than 5, D. 5.2 to D.5.6 should be repeated again to carry out 24 h, until 2 filtration efficiency is less than 5.
D.5.8 If the following occurs, new filters should be used to re-eliminate the static test:
a) Before and after the static electricity, the test filter quality changes more than ± 1% or more than ± 20 g;
b) Before and after retired, the test filter resistance changes more than ± 10% or more than 10 pa.
D.6 Test Report
At least the following elimination test conditions and test data information should be included in the test report:
a) indoor temperature, relative humidity during urination test;
b) purity of isopropyl alcohol solution;
c) the time;
d) Basic information of the electrostatic elimination cabinet, including photos and schematic, the schematic diagram should include the main size, volume, isopropanol tray number, size, evaporation area, isopropyl alcohol solution;
e) The quality of the test filter and the evaporation of the isopropyl alcohol solution before and after the retire electricity test;
f) The resistance of the test filter under the rated air before and after the exhaust test;
g) Before and after the quost test, the test filter was efficient under the rated air volume.
High efficiency air filter element life cycle comprehensive energy efficiency test method
E.1 Test principle
This appendix is directed to the filter material and filter, by a high concentration, the particle size distribution characteristics is close to the actual solid aerosol as possible, using the experimental means to simulate the dust removal process of the accelerated filter element in the actual use process, by monitoring the dust removal process Efficiency and resistance changes, the comprehensive energy efficiency performance of the sampled samples during actual use.
The test method specified in this appendix is only used to evaluate the comprehensive energy efficiency of the life cycle of the filter element under the predetermined test.
E.2 Filtration material test method
E.2.1 Test device
E.2.1.1 Test equipment is in accordance with GB / T 6165 related regulations.
E.2.1.2 The balance index value of the weighing of the test sample can be at least 0.000 1 g.
E.2.2 Test Dust Source
During the dry solid KCl, NaCl dust or particle size distribution, which satisfies the dust required by this standard as a test dust source. The test dust is fully dry and charged and treated if necessary. Test dust count Media Diameter (count peak particle size) is in the range of 75 nm to 125 nm, and geometric standard deviation is not greater than 1.90. The test dust mass concentration during the test was maintained in the range of 10 mg / m3 to 20 mg / m3.
E.2.3 Test method
E.2.3.1 Test sample
Test samples are not arivival, wrinkles, holes or other abnormalities. The comparison of the test sample is 200 mmx200 mm, the test size is. 100cm2. All test samples have the following clear and persistent markers:
a) the logo of the test sample;
b) Test samples upstream.
E.2.3.2 Test filter speed
The test filter speed is selected from the actual filter speed of the filter, preferably 2.50 cm / s or 5.33 cm / s.
E.2.3.3 Test end resistance
In addition to the two sides of the test, the test final resistance was 300 Pa; the test final resistance was 500 Pa; the test final resistance was 500 Pa.
E.2.3.4 Test steps
The test steps are as follows:
a) Experimental samples are measured after the test air temperature and humidity conditions, accurate to 0.000 1 g.
b) Measure the resistance and efficiency in the initial state of the test sample, the test method complies with the relevant provisions of GB / T 6165.
c) Test dust in the dust concentration of the sprayer pressure and the air flow, and maintain a stable dust concentration.
d) Efficiency, resistance and quality of test samples at intervals fixed time test. Among them, efficiency and resistance test meets the relevant regulations of GB / T 6165, quality test is accurate to 0.0001 g. When the test dust mass concentration is 10 mg / m3, the sampling time interval is not more than 20 min; when the test dust mass concentration is 20 mg / m3, the sampling time interval is not more than 10 min. Repeat this operation until the finishing of the filter material test. The resistance of the test sample - the dust removal and efficiency - the smoothing curve consisting of at least 5 uniform distribution data points.
e) When spraying dust to filter material test final resistance, measure the efficiency, resistance and quality of the test sample. At this time, the total weight loss of the test sample is the amount of dust removal.
E.2.4 Test results.
E.2.4.1 The test report includes at least the following information:
a) Test sample level, sample size and test area size, number.
b) Test wind speed, test air temperature, humidity.
c) Types and test concentrations of aerosols.
d) Resistance, efficiency and quality in the initial state.
e) Test process time, and dust.
f) The relatively low filtration efficiency presented by the test sample during the test.
E.2.4.2 Test Report Given the relationship curve of the resistance and efficiency of the test sample during the test.
E.2.4.3 Resistance - Dust Color Curve and Comprehensive Average Resistance Fitting and Calculation by Formula (E.1) and Equation (E.2):
E.2.4.4 Efficiency - Conditioning Curve and Comprehensive Average Efficiency Fit and calculate in formula (E.3) and equation (E.4):
E.3 Filter Test Method
E.3. 1 test device
E.3.1.1 The test device complies with the relevant provisions of GB / T 6165.
E.3.1.2 The balance index value of the weighing is at least 0.1 g for the test sample accumulation.
E.3.2 Test Dust Source
During the dry solid KCl dust or particle size distribution, it meets dust required by this standard as a test dust source. The test dust is fully dry and charged and treated if necessary. Test dust count Media Diameter (count peak particle size) is in the range of 75 nm to 125 nm, and geometric standard deviation is not greater than 1.90. The test dust mass concentration during the test was maintained in the range of 5 mg / m3 to 15 mg / m3.
E.3.3 Test method
E.3.3.1 Test sample
The surface of the test sample is intact, there is no visible dirt and damage; there is a clear mark, and it meets 9.1 regulations.
E.3.3.2 Test air volume
The test sample was tested under its nominal rating.
E.3.3.3 Test end resistance
For the filter for less than 80 PA under the initial state, the test end resistance is 160 Pa; for the filter of 80 PA to 150Pa in the initial state, the test end resistance is 300Pa; for the pressure of 150Pa to 250Pa for the initial state The test end resistance is 500 PA.
E.3.3.4 Test steps
The test steps are as follows:
a) Accurately weigh the test sample after constant weight under the temperature and humidity conditions of the test air, accurate to 0.1 g.
b) Measure the resistance and efficiency in the initial state of the test sample, and the test method complies with the relevant provisions of GB / T6165.
c) Test dust in the dust concentration of the sprayer pressure and the air flow, and maintain a stable dust concentration.
d) The efficiency, resistance and quality of the test samples at intervals fixed time test. Among them, efficiency and resistance testing meets relevant regulations of GB / T6165, quality test is accurate to 0.1g. The sampling time interval is not more than 60 min. Repeat this operation until the filter test end resistance. The drain dust and efficiency of the test samples and the smoothing curve constituted by the dust collector curve are at least 5 uniform distribution data points.
e) When spraying the dust to the filter test final resistance, measure the resistance efficiency and quality of the sample sample, at which time the total weight gain of the sampled sample is the amount of test.
E.3.4 Test results and evaluation
E.3.4.1 The test report includes at least the following:
a) Sample level, sample size, rated air volume and number;
b) Test air volume, test air temperature, humidity;
c) Type and test concentration of test aerosol;
d) Resistance, efficiency and quality in the initial state;
e) Time, dust removal and test end resistance during test
f) The relatively low filtration efficiency presented by the test sample during the test.
E.3.4.2 Test Report The relationship curve of the resistance and efficiency change of the sample during the test.
E.3.4.3 Curve and Comprehensive Average Resistance Press Formula (E.1) and the Equation (E.2) in the formula (E.3) and the integrated average efficiency according to equation (E.3) ) And equation (E.4) fitting and calculated. Among them, a predetermined lotus dust (MX) for calculating the average resistance is 50 g.
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