This standard specifies the structural type, size series and tolerance of Y-shaped, combined and E-shaped reciprocating rubber seals for pneumatic valves. This standard is applicable to ordinary pneumatic reversing valves, and other types of valves can be used as a reference. JB/T 6375-1992 Size series and tolerance of rubber seals for pneumatic valves JB/T6375-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T6375-92
Dimension series and tolerances of rubber sealing rings for pneumatic valves 1992-07-15 Issued
Implementation of the Ministry of Machinery and Electronics Industry of the People's Republic of China on 1993-01-01
Mechanical Industry Standard of the People's Republic of China
Dimension series and tolerances of rubber sealing rings for pneumatic valves JB/T6375-92
Published and issued by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry Printed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (Beijing) Box 8144, Beijing, 100081)
Copyright reserved, no reproduction allowed
Format 880×1230
3 sheets 5/8
8Number of characters 12000
First edition October 1992bzxZ.net
First printing October 1992
Print run 0.001—500
Price 1.50 yuan
Mechanical Industry Standard of the People's Republic of China
Dimension series and tolerance of rubber seal rings for pneumatic valves Subject content and scope of application
JB/T 6375 --- 92
This standard specifies the structural type, dimension series and tolerance of Y-shaped, combined and E-shaped reciprocating rubber seal rings for pneumatic valves. This standard applies to ordinary pneumatic reversing valves, and other types of valves can be used as a reference. 2 Symbols and codes
2.1 Symbol
D Nominal diameter of hole;
d Nominal diameter of shaft;
D-outer diameter of sealing ring:
di-inner diameter of sealing ring;
d2-inner diameter of root of Y-shaped rubber sealing ring;
radial section width of root of SY-shaped rubber sealing ring; 1-height of sealing ring;
D: outer diameter of sealing ring boss;
D: inner diameter of sealing ring boss;
d: radial section diameter of outer ring of combined rubber sealing ring: d-radial section diameter of inner ring of combined rubber sealing ring; D-outer diameter of support ring of combined rubber sealing ring; Ds-inner diameter of support ring of combined rubber sealing ring; h-height of support ring of combined rubber sealing ring. 2.2 Code
QYD-Y-shaped rubber seal ring for hole;
QYd-Y-shaped rubber seal ring for shaft;
QZ-combined rubber seal;
QEE-shaped rubber seal ring.
3. Dimension series and tolerance
This standard specifies the dimension series and tolerance of three types of seal rings: Y-shaped rubber seal ring;
combined rubber seal ring;
E-shaped rubber seal ring.
3.1 Y-shaped rubber seal ring
3.1.1 Y-shaped rubber seal ring with equal height lip for hole 3.1.1.1 The structural type of Y-shaped rubber seal ring with equal height lip for hole is shown in Figure 1. Approved by the Ministry of Machinery and Electronics Industry on July 15, 1992 and implemented on January 1, 1993
Marking location
JB/T6375-92
Figure 1 Structural type of Y-shaped rubber seal ring with equal height lip for hole The dimension series and tolerance of Y-shaped rubber seal ring with equal height lip for hole shall comply with the provisions of Table 1. 3.1.1.2
Table 1 Dimension series and tolerance of Y-shaped rubber seal ring with equal height lip for hole D
Basic size
Limit deviation
Basic size
Y-shaped rubber seal ring for hole
Limit deviation
Basic size
3.1.2.1 The structural type of Y-shaped rubber seal ring for hole is shown in Figure 2. Marked part
Limit deviation
Basic size
Figure 2 Structural type of Y-shaped rubber sealing ring for hole 3.1.2.2 The dimension series and tolerance of Y-shaped rubber sealing ring for hole shall comply with the provisions of Table 2. 2
Limit deviation
Basic size
Limit deviation
Basic size
Limit deviation
JB/T6375—92
Table 2 Dimension series and tolerance of Y-shaped rubber sealing ring for hole d
Basic size
Y-shaped rubber sealing ring for shaft
Limit deviation
Basic size
Limit deviation
The structural type of Y-shaped rubber sealing ring for shaft is shown in Figure 3. D
Marked part
Basic size
Figure 3 Structural type of Y-shaped rubber seal for shaft
Basic size
Limit deviation
JB/T6375--92
3.1.3.2 The dimension series and tolerance of Y-shaped rubber seal for shaft shall comply with the provisions of Table 3. Table 3 Dimension series and tolerance of rubber seal for shaft d
Basic size Limit deviation
Basic size
Combined rubber seal
Limit deviation
Basic size
Limit deviation
The structural type of combined rubber seal is shown in Figure 4. Marked part
Basic size
Limit deviation
Support ring
Figure 4 Structural type of combined rubber sealing ring+0.15
Basic size Limit deviation
JB/T6375-92
3.2.2 The dimension series and tolerance of combined rubber sealing ring shall comply with the provisions of Table 4. Table 4 Dimension series and tolerance of combined rubber sealing ring D
Basic size
Basic size
Limit deviation
Limit deviation
3.3 E-shaped rubber sealing ring
Basic size
Limit deviation
Basic size!
Limit deviation
Basic size
Basic size
The structural type of E-shaped rubber sealing ring is shown in Figure 5. Limit deviation
Limit deviation
Marked part
Basic size
Limit deviation
Basic size
Figure 5 Structural type of E-shaped rubber sealing ring
Limit deviation
Basic size
Limit deviation
Basic size
Limit deviation
JB/T6375—92
The dimension series and tolerance of E-shaped rubber sealing ring shall conform to the provisions of Table 5. 3.3.21
Table 5 Dimension series and tolerance of E-shaped rubber sealing ring D
Basic size
Limit deviation
Basic size
Limit deviation
Basic size
Limit deviation
The marking of the sealing ring consists of the code of the sealing ring, the nominal hole diameter and the standard number. The simplified marking of the sealing ring consists of the sealing ring code and nominal diameter. Marking method
4.2 Marking example
Standard number
Nominal shaft diameter, mm
Nominal hole diameter, mm
Y-shaped rubber sealing ring for hole
Basic size
Limit deviation
The rubber sealing ring with code QYD, nominal hole diameter of 40mm and nominal shaft diameter of 35mm is marked as: QYD40X35JB/T6375-92
Simplified example:
QYD40X35
Additional instructions:
This standard is proposed and managed by Wuxi Pneumatic Technology Research Institute of the Ministry of Machinery and Electronics Industry. This standard is drafted by Jinan Foundry and Forging Machinery Research Institute of the Ministry of Machinery and Electronics Industry. The main drafters of this standard are Wang Mingqi and Yang Licheng. 6
Basic size
Limit deviation
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