This standard specifies the types and sizes of J-type vacuum rubber seals. This standard is applicable to the seals of rotary vacuum mechanical equipment with atmospheric pressure outside and vacuum chamber pressure higher than 1×10-4pa, at the specified temperature and with a rotational linear speed lower than 2m/s and a rotation speed lower than 2000min-1. JB/T 1090-1991 Types and sizes of J-type vacuum rubber seals JB/T1090-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
J-type vacuum rubber seal
Type and size
Subject content and scope of application
This standard specifies the type and size of J-type vacuum rubber seal. JB 1090--91
This standard is applicable to the seal of rotary vacuum mechanical equipment with atmospheric pressure outside and vacuum chamber pressure higher than 1×10-4Pa, at the specified temperature and with a rotational linear speed lower than 2m/s and a rotation speed lower than 2000min-1. 2 Type and size
2.1 The type and series size of J-type vacuum rubber seal shall comply with the provisions of Figure 1 and Table 1. d2
Moving working surface
2.2Marking example
J-type vacuum rubber seal ring nominal diameter d=50mm, marked as: J-type seal ring d50JB1090
3Technical requirements
3.1The working medium is mechanical pump oil, diffusion pump oil or vacuum grease. 3.2The working temperature is -25～±80℃.
Static working surface
3.3When working under the condition of protective gas filling, the protective gas pressure shall not exceed 5×10*Pa. 3.4The physical and mechanical properties of the rubber material shall ensure that the vacuum chamber pressure is not higher than 1×10-4Pa. 3.5The working surface of the J-type vacuum rubber seal ring shall be flat and smooth, and no bubbles, impurities, uneven defects are allowed. The appearance quality indicators of its non-working surface shall comply with the provisions of Table 2.
3.6For accessories and installation structure types, please refer to Appendix A (reference part). Approved by the Ministry of Machinery and Electronics Industry on January 1, 1997, implemented on July 1, 1991
Nominal diameter
Limit deviation
JB 1090--91
dz, D
Limit deviation
FETE1EF
Limit deviation
Seam misalignment
JB1090-91
Nominal diameter below 50mm
For non-working surface, the bubble diameter is not more than 1mm, and there shall be no more than 2 places
For non-working surface, the impurity area is not more than 1mm2, and there shall be no more than 2 places
For non-working surface, the four convexities are not more than 0.5mm, and the area is not more than 2mm2, and there shall be no more than 2 places
The burr height and shearing depth shall not exceed 0.3mm. Allowed to exist, but shall not exceed the tolerance range standard
Nominal diameter 50～200mm
Non-working surface, bubble diameter is not more than 2mm, no more than 2
Non-working surface, impurity area is not more than 2mm2, no more than 2
Non-working surface, concave and convex is not more than 0.5mm, area is not more than 6mm2, no more than 2Www.bzxZ.net
Burr height and shear damage depth shall not exceed 0.3mm Allowed to exist, but shall not exceed 0.5mm
Note: In order to make the surface of the sealing ring smooth, the surface roughness Ra of the mold is required to be 0.2um or hard chrome plated polishing. 3
JB 1090—91
Appendix A
Type sealing ring and installation structure type
(reference)
The type and series size of A1 sealing sleeve are shown in Table A1 and Figure A1. Table A1
Nominal diameter
d、d2
Note: ①The limit deviations of d3d4, HI, H2, Hs and H4 in the table are implemented as the tolerances not specified. ②The material of the sealing sleeve is A3 or H62.
D(d11)
The type and series size of the gasket are shown in Figure A2 and Table A2. A2
Nominal diameter
Limit deviation when measuring
JB 1090—91
D,(dl)
Note: ①The limit deviations of the table and c are implemented as the tolerances not specified. Nominal diameter
Limit deviation
②H can be changed due to structural reasons.
The gasket material is A3 or H62.
A3The installation example and the requirements for the seal groove are recommended as shown in Figure A3. JB109091
D(HI1)
D(H11)
Note: ①If tightened with a nut, a metal washer should be installed between the nut and the rubber seal. ②Surface roughness of the inner surface of each part of the vacuum chamber: the sealing surface Ra value is 1.6μm, the other surface Ra value is 3.2um, and the shaft surface roughness R value is 0.8μm
Additional instructions:
This standard is proposed and managed by the National Vacuum Technology Standardization Technical Committee. This standard is drafted by the Shenyang Vacuum Technology Research Institute. The main drafter of this standard is Zhang.
From the date of implementation of this standard, the original JB1090-83&J type vacuum rubber seal type and size" will be invalid. 6
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