JB/T 53389-1999 Quality classification of medium and light mechanical seal products JB/T53389-1999 standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T53389-1999
Medium and light mechanical seals
Product quality classification
(Internal use)
Published on December 30, 1999
National Bureau of Machinery Industry
Implemented on June 1, 2000
JB/T53389-1999
Medium and light mechanical seals is a revision of "Medium and light mechanical seals".
This standard is a revision of JB/T53389-94 "Medium and light mechanical seals". This standard replaces JB/T53389-94 from the date of implementation. Appendix A of this standard is the appendix of the standard.
This standard is proposed and managed by the Mechanical Seals Standardization Technical Committee. The responsible drafting unit of this standard: Hefei General Machinery Research Institute. The main drafters of this standard: Cao Wangshun, Shi Fujiang, Zhang Yuhong. I
1 Scope
Mechanical Industry Standard of the People's Republic of China
Medium and light mechanical seals
Product quality classification
(Internal use)
This standard specifies the quality grade indicators and inspection and sampling methods for medium and light mechanical seals. This standard applies to medium and light mechanical seals, the fluids sealed are liquids. This standard does not apply to metal bellows mechanical seals. 2 Referenced standards
JB/T53389-1999
Replaces JB/T53389-94
The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. When this standard was published, the versions shown were valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards: GB/T 1184—1996
GB/T 1239.6—1992
GB/T 6556—1994
GB/T 14211—1993
JB/T4127.1—1999
JB/T 6619.1—1999
JB/T 7757.1—1995
JB/T7757.2—1995
Quality requirements for mechanical seal productswwW.bzxz.Net
Tolerances for shape and position without tolerance values
Design and calculation of cylindrical helical springs
Types, main dimensions, materials and identification marks of mechanical sealsTest methods for mechanical seals
Technical conditions for mechanical seals
Technical conditions for light mechanical seals
Cylindrical helical springs for mechanical seals
O-shaped rubber rings for mechanical seals
Mechanical seal products should be manufactured in accordance with GB/T6556, JB/T6619.1 and JB/T4127.1. The quality classification of mechanical seal products shall be in accordance with the provisions of Table 1, Table 2, Table 3 and Table 4. Table 1 Average leakage index
Medium-sized mechanical seal products
Shaft or sleeve diameter>50mm
Shaft or sleeve diameter≤50mm
Internal combustion engine cooling water pump or similar working conditions
Submersible electric pump similar working conditions
Qualified products approved by the State Machinery Industry Bureau on December 30, 1999
Light-duty mechanical seal products
Qualified products||t t||Superior product
Superior product
2000-06-01 implementation
Any sealing ring
Medium-sized mechanical seal products
Qualified product
≥8000
Superior product
≥10000
JB/T53389-1999
Table 2 Wear index
Qualified product|| tt||Table 3 Life index
Medium-duty corrosion-resistant mechanical seal products
Qualified products
≥4000
≥6000
Superior products
≥8000
mm/100h
Superior products
Light-duty mechanical seal products
Qualified products
≥4000
Superior products
≥6000
Note: Life index 1 for medium-sized and medium-sized corrosion-resistant mechanical seals refers to "service life"; light-duty mechanical seals refer to "working life"; based on recent evaluations by no less than two major users
Table 4 Grading of qualified rate of corresponding grade items for disassembly inspection
Main items
Key items
Qualified products
Superior products
≥ 95
Unqualified items should not affect
Product performance
The quality assessment of technology-imported products shall be carried out in accordance with the requirements or contracts for introduction, but the product quality grading shall be assessed in accordance with this standard, and the inspection items shall be in accordance with the requirements of items 2, 3 and 4 in Table 5.
Number of inspected products
Test items
Disassembly inspection
Air sealing test
Static pressure test
5h operation test
100h operation test
Medium-sized mechanical seal products
Product spot check
Product review
Product excellence
Product identification
Note: The numbers in brackets refer to mechanical seal products with polytetrafluoroethylene bellows structure. Number of inspected products 4 Inspection methods
Light-duty mechanical seal products
Product spot check
Product review
Product excellence
Product identification
The inspection items for mechanical seal products shall be in accordance with the requirements of Table 5, among which the operation test shall be carried out at 0-80℃, and the other inspection conditions and methods shall be in accordance with the requirements of GB/T14211 and JB/T6619.1. The dimensional tolerance of rubber seals is tested by optical projection method. 4.2
The disassembly inspection of mechanical seal products shall be in accordance with Appendix A (Appendix to the standard). 5 Sampling
The number of inspected products shall be in accordance with Table 5.
JB/T 53389-1999
The number of product samples for sampling shall be in accordance with Table 6, but this limit does not apply when sampling among users and conducting surprise inspections. Table 6 Number of product samples
Product category
Single specification
Series of products
Medium-sized mechanical seal products
Each specification
Light-duty mechanical seal products
≥100
≥100
Each specification
≥ 15
JB/T53389-1999
Appendix A
(Appendix to the standard)
Requirements for disassembly inspection items and number of each set of medium and light mechanical seals. Requirements for disassembly inspection items and number of each set of medium mechanical seals shall be as specified in Table A1. Table A1
Inspection items
Hard sealing ring
Soft sealing ring
Stationary ring and its components
Rotating ring and its components
Inlaid ring and ring seat
Graphite ring, filling
PTFE ring
Rubber auxiliary seal
PTFE
Auxiliary seal||tt ||PTFE corrugation
Inspection content
Qualified products
☆Flatness of sealing surface mm
Surface roughness of sealing surface Rμm
Metal material
Non-metal material
Flatness of sealing surface (except PTFE ring)Surface roughness of sealing surface Rμm
Free height of single spring
Perpendicularity of both ends of single spring to the center lineWorking load of spring (multiple springs can be withdrawn
measured by one)
Height difference of multiple springs in each set of products
Parallelism of sealing end face to the contact end face with auxiliary seal and roughness R of the contact surface of auxiliary seal. μmSize of the contact surface with the auxiliary seal
Parallelism of the sealing end face to the contact end face with the auxiliary seal and the roughness of the contact surface with the auxiliary seal RμmSize of the contact surface with the auxiliary seal
Matching size of the matching surface between the front ring and the ring seat (spot check in the semi-finished product warehouse during the manufacturer's inspection)☆Hydrostatic pressure test for individual or complete seals, test conditions according to GB/T14211
Surface quality
Internal diameter of the cross section of the O-shaped rubber ring for the rotating ring| |tt||Internal diameter of O-ring for stationary ring
Internal diameter of O-ring for rotating ring
Internal diameter of O-ring for stationary ring
Auxiliary sealing ring for rotating ring, the test items are the same as item 17Auxiliary sealing ring for stationary ring, the test items are the same as item 17Test items are the same as item 17
Technical requirements
First-class products
Superior products
Cylindrical helical springs are in accordance with GB/T
1239.6, JB/T7757.1 or as per the drawing
Other shapes of springs as per the drawing
According to GBT1184-1996 Grade 7
h8 (H8)
According to the drawing
No leakage
According to JB/T7757.2 or as per the drawing
No leakage
No leakage, rupture or obvious deformation
Test items||tt| |Transmission sleeve or spring seat tube
JB/T53389-1999
Table A1 (Complete)
Inspection content
Dimensions of the mating surface with the shaft or sleeve
Roughness of the mating surface with the shaft or sleeve Rum Residual traces and debris between processes
According to JB/T4127.1
1☆ items are key items, and the rest are main items. 2Items 19 to 2 are tested by optical projection method. A2
The requirements for disassembly inspection items and items of each set of light mechanical seal products shall be as specified in Table A2. Table A2
Test items
Hard sealing ring
Soft sealing ring
Assembly
Inspection content
☆Flatness of sealing surface mm
Surface roughness of sealing surface Rμm
Flatness of sealing surface
Surface roughness R of sealing surface
Working deformation
Working load
Free height
Verticality of both ends to the center line
Matching dimension with rotating assembly part
Matching dimension with housing matching part Inch
Assembly free height
Stamping parts sealing part matching surface
Electroplating parts surface
General steel parts
According to JB/T4127.1 requirements
According to the product structure, the uninspected items are as shown in Table A1
Note: ☆ items are key items, and the rest are main itemsQualified products
Qualified products
Technical requirements
First-class products
Technical requirements
First-class products
Superior products
Superior products
Not more than 60% of the limit deformation
Cylindrical helical springs shall be in accordance with JB/T
7757.1, GB/T1239.6, or in accordance with the drawing
sample requirements
In accordance with the drawing requirements
No longitudinal stripes
No plating layer shedding and rust
No rust
People's Republic of China
Mechanical Industry Standard
Medium and light mechanical seals
Product quality classification
(for internal use)
JB/T53389—1999
Published and issued by the Mechanical Science Research Institute| |tt||Printed by the Mechanical Science Research Institute
(No. 2, Shouti South Road, Beijing
Postal Code 100044)
Format 880X12301/16 Sheet 1/2
First edition in June 2000
Print run 1-500
Word count 12000
First printing in June 2000
Price 1000 Yuan
99-1695
Mechanical Industry Standard Service Network: 1
http/wwwJB.ac.cn
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