JB/T 9756-1999 Technical Specifications for Paper Filter Elements for Air Filters in Internal Combustion Engines JB/T9756-1999 Standard download decompression password: www.bzxz.net

ICS27.020
Machinery Industry Standard of the People's Republic of China
JB/T9756--1999
Air filter paper elements
Internal combustion engine compartment
Technical conditions
lnternal combustion cnginesAir filter paper elementsspecifications
Issued on September 17, 1999
State Bureau of Machinery Industry
Implementation on January 1, 2000
Revision of JB/T9756--1999
Technical conditions. During the revision, only the original standard was revised. This standard is a revision of N141086 (Paper filter element for air cleaner of internal combustion engine). The main technical content has not been fully updated. This standard replaces K[430-86 from the date of implementation. This standard was proposed and managed by the National Technical Committee for Standardization of Internal Combustion Engines: Technical Standard Reform Unit: Bihai Internal Combustion Engine Research Institute. The main drafter of this standard is Zhang Shaojie. First published in 2001.
Standard of the Machinery Industry of the People's Republic of China
Paper Filter Elements for Air Filters of Internal Combustion Engines
Technical Conditions
Iniernal combustion engines Air filter paper filter elements Specl Ficattons
JB/T9756-1999bzxz.net
Substituted with NI430-86
This standard specifies the technical requirements, test methods and inspection plan, as well as marking, packaging, transportation and storage of paper filter elements for air filters of internal combustion engines.
This standard is applicable to paper filter elements for air filters of internal combustion engines with a volume flow rate of less than 4000mh (hereinafter referred to as paper filter elements) Standard
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standard parts will be shortened. Parties using this standard should explore the possibility of using the following standards in conjunction with the latest version. GD/T18041992
GB.TI:335—1989
JB.T9747—1999
3 Technical requirements
General tolerances End-of-settlement tolerances for cutting dimensions
End-of-settlement tolerances Limit deviations of angles
Testing methods for air filters for internal combustion engines
3.1 The filter element shall be manufactured in accordance with the product samples and technical documents approved by the prescribed procedures, and its technical requirements shall comply with the provisions of this standard. 3.2 At the rated air volume flow, the original positive pressure of the filter element shall not be greater than 0.30kP. 3.3 Under the rated air volume flow, the original filtration efficiency of the filter element shall not be less than 99.5%. 3.4 The filter paper shall be heat-cured and have good water resistance. 3.5 The metal parts used in the filter element shall be rust-proofed. 3.6 The spacing of the filter paper shall be uniform.
3.? The tolerance of the filter paper fold number: if the filter paper fold number is less than 50 folds, it shall be 2 folds; if the filter paper fold number is 50-100 folds, it shall be 3 folds; if the filter paper fold number is more than 100 folds, it shall be 4 folds. 3.B The dimensional deviation of the inner hole diameter of the filter element end cover shall comply with the provisions of the upper tolerance of Class C in GB/T1B04-1992. 3.9 The dimensional deviation of the core height shall comply with the provisions of Class C in GB/T1804-1992. 3.10 The deviation of the vertical angle of the center of the core to the end face shall comply with the V-level regulations of GBT11335-199. 3. The accuracy of the return at both ends of the whole core shall comply with the provisions of Table 1. 3.13 Under normal use conditions, there shall be no acid cracking, perforation and degumming within 1000. 3.13 The filter element shall be clean, and there shall be no dirt and impurities on the inner and outer surfaces. State Administration of Machinery and Equipment Industry. 1999-D9-17 Approved 2000-01-01 Real Screening
JB/T9756-1999
Note: The position is measured on the annular surface IDmm from the inner hole diameter of the filter element. 4 Test methods and inspection rules
200-400
Center accuracy
4.13.2 and 3.3 The test method shall be in accordance with the provisions of JBT4747. 3,4 The filter paper composition shall be the specified complete filter paper, and shall be heat treated according to the performance requirements.
4.2 Each product shall be inspected by the technical inspection department of the manufacturer. After passing the inspection, the product certificate shall be issued. 4.3 When the ordering unit samples the product, the number of samples shall not exceed 0.1% of the number of each batch of delivery, and shall not be less than 5 pieces. If there is one unqualified piece in the sampling inspection, the number of samples shall be doubled. If there is still one piece that does not contain the substance, it shall not be collected. 5 Marking, packaging, transportation and storage
s. Each product shall be marked with the name of the manufacturer or factory logo, product name and model. Each product shall be accompanied by a product certificate signed by the technical inspection department and storage and maintenance instructions. It shall be packed with moisture-proof materials and then packed in paper boxes.
5.3 The factory packaging of the product shall ensure that the product will not be damaged during normal transportation. 5.4 The outer surface of the packaging box should be marked with:
a) Manufacturer name and address;
b) Product name and model:
? Factory date (year, month):
d Volume (length × width × height) m;
c) Gross weight, kg:
Number of trays:
g) Receiving unit address:
“Anti-warping”, “Careful transfer” and other signs. 55 The product should be placed in a well-ventilated warehouse. Under the condition of positive protection, the manufacturer guarantees that the filter element will not rust, rot or degumming within 12 days after leaving the factory.
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