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Mechanical Industry Standard of the People's Republic of China
JB/T7218-94
Cartridge Pressure Filter
Published on July 18, 1994
Ministry of Machinery Industry of the People's Republic of China
Implementation on July 1, 1995
Mechanical Industry Standard of the People's Republic of China
Cartridge Simple Pressure Filter
1 Subject Content and Scope of Application
JB/T7218-94
This standard specifies the terminology, type and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of simple pressure filter elements (hereinafter referred to as filter elements). This standard applies to simple pressure filter elements and also to other types of liquid filter elements. 2 Reference standards
GB6388
GJB420
JB/T6418
JB/T7219
3 Terms
3.1 Passing efficiency
Transport packaging delivery and receipt mark
Oil for aircraft hydraulic system Contamination level classification and separation Mechanical cleanliness determination method
Simple pressure filter element performance test method The percentage of the number of particles of a certain size filtered out and the number of particles of the same size before filtration. 3.2 Maximum size particle passing
When the filtration efficiency of a certain size particle reaches 99%, this size is the maximum size particle allowed to pass. 3.3 Initial filtration accuracy
When the filtration efficiency of a certain size particle reaches 95%, this size is the initial filtration accuracy. 3.4 Nominal filtration accuracy
The nominal value of the initial filtration accuracy of the filter element.
3.5 Filter flow
The volume of liquid passing through the clean filter element per unit time under the conditions of pressure drop of 0.014MPa and temperature of 20±2℃. 3.6 Apparent dirt holding capacity
The total amount of test powder added to the test system when the pressure drop of the filter element reaches the rated value. 3.7 Compressive strength
The maximum working pressure difference that the filter element can withstand. 3.8 Compatibility
Under given conditions, the filter element will not experience a decrease in filtration performance or changes in appearance and dimensions after contacting a certain liquid. 3.9 Bubble pressure
Under given conditions, when the filter element is immersed in the test liquid and a small amount of air pressure is passed from the inside of the filter element, the pressure value when bubbles begin to appear on the outside of the filter element.
3.10 Rated axial load
The rated axial force acting on the end of the filter element without causing permanent deformation or damage to the filter element while maintaining the filtering performance. 3.11 Flow fatigue strength
Approved by the Ministry of Machinery Industry on July 18, 1994
Implemented on July 1, 1995
JB/T7218-94
The ability of the filter element to withstand the bending caused by the periodic change of the system flow state, which leads to structural damage. 3.12 One-pass method
The test method in which the test liquid does not circulate after passing through the filter element. 3.13 Multiple-pass method
A test method for circulating the test liquid while keeping the flow and contamination level unchanged when passing through the filter element. 4 Types and basic parameters
Structural type
Figures 1 to 6 show the basic structural types of various types of filter elements: a.
The structure of the stitch (thread) wound filter element is shown in Figure 1;
The structure of the felt and cotton rolled filter element is shown in Figure 2: The structure of the longitudinal folded (paper, metal fiber mesh, non-woven fiber) inner and outer skeleton filter element is shown in Figure 3; The structure of the axial folded (paper, non-woven fiber) outer skeleton filter element is shown in Figure 4: The structure of the plastic microporous, ceramic, and metal powder sintered filter element is shown in Figure 5; The structure of the activated carbon filter element is shown in Figure 6.
Figure 1 Wrapped (thread) wound filter element
Figure 2 Felt and cotton rolled filter element
Plastic protective
JB/T7218-94
Sugar paper, metal fiber, non-woven fiber system
Figure 3 Longitudinal folding (paper, metal fiber net, non-woven fiber) inner and outer skeleton filter element Sugar, fiberless
Figure 4 Axial folding (paper, non-woven fiber) outer skeleton filter element -..:
Figure 5 Plastic microporous, ceramic, metal powder sintered filter element German medium
Plastic protective gastric
Activated carbon filter element
Active carbon head
4.2 Basic parameters
The basic parameters of the filter element shall comply with the provisions of Table 1. Total
Nominal filtration accuracy m
Length L
Inner diameter d
Outer diameter D
Filter element model and preparation method
JB/T 7218-94
Parameters
0.1,0.2,0.4, 0.45,0.5, 0.6. 0.8.1. 2.3,5.7,10,15,20,25,30,50,75,100,150100,125,150,200,250,500.750.100029
Filter element length
Polypropylene
Stainless steels
Filter element skeleton material
Filter element nominal German accuracy
Filter element filter layer material
Filter element classification
Marking example:
Carbon steel T
No skeleton F
Polypropylene
Acrylic fiber N
Glass fiber G
Acetate fiberR
PolypropyleneU
Polyethylene
Polyethylene (PE)E
Polyvinyl formal (PVF)
Nylon (PA)
Activated carbonT
Stainless steel fiberB
CeramicM
Wound typeS
Microporous plastic
Powder sinteringF
Pleated type2
Wound type polypropylene filter element. The nominal filtration accuracy is 10um. The filter element with a polypropylene skeleton and a filter element length of 500mm is marked as SP10P500.
sTechnical requirements
5.1 General requirements
JB/T7218-94
The filter element shall comply with the provisions of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 5.2 Filter element performance
Filter element performance shall comply with the provisions of Table 2.
Nominal filtration accuracy
Maximum particle size
Initial filtration accuracy
Drinking water
YH-10 aviation
Hydraulic oil
Apparent dirt holding capacity
Compressive strength
Cleanliness
Compatibility
Rated axial load
025~40
30~5035~60
40~7055~8075~105110~150
No change in performance, appearance and size after 72h of penetration into the filtered solution100
Note: ①The values listed in the table are the performance of the deep filter element with a length of 250mm. ≥45
②The flow rate values listed in the table are the flow rates of the filter element when the pressure drop is 0.014MPa. The flow rates of cotton fiber and glass fiber slit filter elements are lower than the values listed in the table, which are 0.6 times the values listed in the table. The flow rates of Tenglun fiber, Grid, felt-type filter elements and microporous plastic filter elements are higher than the values listed in the table, which are 1.3 times the values listed in the table.③The clarity of the filter element is in accordance with the A grading system in GJB420. 5.3 Appearance
The surface of the filter element should be clean, and there should be no obvious defects such as messy lines, cracks, protrusions, pits, etc. 5.4 The external dimension tolerance and shape and position tolerance of the filter element shall comply with the provisions of Table 3. Table 3
Core length
Straightness tolerance
Axis and end face straightness tolerance
Length tolerance
Inner diameter tolerance
Maximum operating temperature
The maximum operating temperature of the filter element shall comply with the provisions of Table 4. 200
Filter layer material
Polypropylene, nylon, cotton
Polyvinyl formal, polyethylene
Mulberry propylene, nylon
Cotton, nylon
Glass fiber
Stainless steel fiber
Activated carbon
Flow fatigue strength
The filter element shall withstand flow fatigue for no less than 1000 times. Bubble pressure
JB/T7218-94
Frame material
Polypropylene
No frame
Stainless steel
Stainless steel
Stainless steel
Stainless steel
Polypropylene
Maximum use temperature
The filter element's bubble pressure test shall comply with 3.9, as a routine test, this value is allowed to be 20% lower than the corresponding measured pressure difference value. 6
Test method
The test method of the filter element shall be in accordance with the provisions of Table 5.
Overall dimensions
Geometric tolerances
Inspection items
Maximum size of particles
Initial passing accuracy
Filter element flow
Apparent dirt holding capacity
Pressure strength
Cleanliness
Compatibility
Rated axial load
Flow fatigue strength
Bubbling pressure
Maximum use density
Note: When there is a difference between the test results of Appendix A and Appendix B of JB/T7219, Appendix B shall prevail. Inspection rules
Basic requirements
Test methods
Vernier caliper (average value of five axes)
Feeler gauge, square
According to Appendix A or Appendix B of JB/T7219
According to Chapter 5 of JB/T7219
According to Chapter 6 of JB/T7219
According to Chapter 7 of JB/T7219
According to JB/ T6418
According to Chapter 10 of JB/T7219
According to Chapter 8 of JB/T7219
According to Chapter 9 of JB/T7219
According to Chapter 4 of JB/T7219
According to Chapter 10 of JB/T7219
Filter elements must be inspected by the manufacturer according to this standard and technical documents. They can only leave the factory after they are qualified, and they must be accompanied by a product certificate. Inspection classification
JB/T7218-94
Product inspection of filter elements is divided into factory inspection and type inspection. 7.2.1 Factory inspection
Each filter element must be inspected for appearance quality before leaving the factory. Other items are inspected by random sampling and batch sampling. The batch sampling rate is 0.3%, and three pieces are inspected for less than 1,000 pieces.
7.2.2 Type inspection
Type inspection must be carried out in any of the following situations: a.
Different types of filter elements are finalized or transferred to other factories for production; after formal production, such as changes in structure, process, raw materials or resumption of production after long-term suspension; when there is a significant difference between the factory inspection result and the last type inspection result (except for items 1, 2 and 3 in Table 6); when the national quality supervision department puts forward type inspection requirements 7.3
Inspection items
Inspection items are shown in Table 6.
Inspection items
Appearance size Size
Geometric tolerance
Maximum size
Initial keying accuracy
Core mass
Apparent spinning mass
Compressive strength
Clearance
Compatibility
Rated axial load
Flowing fatigue strength
Port pressure
Maximum operating temperature
Type inspection
Note: "△" indicates items to be inspected, "\" indicates items to be inspected as needed, and "-" indicates no test is performed. 7. 4
Judgment rulesbzxZ.net
If any one of the items specified in the inspection table 6 fails to reach the specified value, the product shall be judged as unqualified. Factory inspection
If one item is unqualified after inspection, it shall be re-inspected as a double sample. If the re-inspection is qualified, the whole batch shall be qualified: if there are still unqualified products after the re-inspection, the whole batch shall be judged as unqualified. If there are two unqualified items in the whole batch, the whole batch shall be judged as unqualified and no re-inspection shall be conducted. 8 Labeling, packaging, transportation and storage
8.1 Marking
8.1.1 Each filter element shall be marked with the trademark, category, material, nominal filtration accuracy, length, etc. in an appropriate manner. 8.1.2 The outer packaging box shall be marked with the shipping and receiving marks in accordance with the provisions of GB6388. 8.2 Packaging
8.2.1 Each filter element shall be packed in a transparent plastic bag After packaging, pack in moisture-proof boxes. JB/T7218-94
8.2.2 Place random documents such as product certificates and instructions in each box, and seal the box tightly. 8.3 Storage
8.3.1 The filter element should be transported in a box or covered with a awning, and should be moisture-proof during transportation. 8.3.2 The filter element should be stored in a dry and clean warehouse. Additional notes:
This standard was proposed by the National Technical Committee for Separation Machinery Standardization. This standard is under the jurisdiction of the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard was jointly drafted by the Tenth Design Institute of the Ministry of Machinery Industry, the Hefei General Machinery Research Institute of the Ministry of Machinery Industry, and the 116th Factory of the Ministry of Aeronautics and Astronautics.
The main drafters of this standard are Sui Yongyi, Xu Zhengxian, Gu Tianyi, and Li Chunlan. 8
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