This standard specifies the type and size, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of VD sleet rubber seals. JB/T 6994-1993 VD shaped rubber seals JB/T6994-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T6994-93
VD-shaped rubber sealing ring
Published on September 3, 1993
Ministry of Machinery Industry of the People's Republic of China
Implemented on July 1, 1994
Mechanical Industry Standard of the People's Republic of China
Vp-shaped rubber sealing ring
Subject content and scope of application
JB/T 6994—93
This standard specifies the type and size, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of V-shaped rubber sealing rings.
This standard applies to V-shaped rubber sealing rings for end face sealing and dust prevention in mechanical equipment with a circumferential speed of the rotating shaft not exceeding 19m/s.
2 Reference standards
GB3672
GB5721
GB7040
HG4-329
3 Types and dimensions
Dimensional tolerances of solid rubber molded and extruded productsGeneral provisions for marking, packaging and transportation of rubber sealing productsRubber materials for lip seals of rotating shafts
Technical conditions for sealing rubber products
Vp.-shaped rubber seals are divided into S type and A type, see Figure 1 and Figure 2. Figure 1 S type
Marking example:
Figure 2 A type
The nominal shaft diameter is 110mm, the inner diameter of the seal is 99mm, and the material is nitrile rubber S-type seal: V. 110S sealing ring nitrile rubber JB/T6994-93 nominal shaft diameter is 120mm, the inner diameter of the sealing ring is 108mm, the material is fluororubber A-type sealing ring: V. 120A sealing ring fluororubber JB/T6994-93 3.2S-type sealing ring dimensions are shown in Table 1.
Approved by the Ministry of Machinery Industry on September 3, 1993
Implemented on July 1, 1994
Seal Diagram Code
V,100s
Vp110s
Vp120S
Vp130S
Vp140S
Vp150S
Vp170S
Vp180s
Ve19os
Shaft Diameter d,
4.5 --5.5
11.5~13.5
13.5~15.5
15.5~17.5
17.5~19.0
33--36
38~43
98~105
105~115
115~ 125
125 ~ 135 | --93
d smia
Installation width
11.0±1.0
13.5±1.2
15.5±1.5
18.0±1.8
3A seal ring dimensions are shown in Table 2.
Seal ring code
Vp100A
V,110A
Vp120A
Vp130A
V,140A
Vp150A
11.5~12.5
12.5~13.5
13.5~15. 5 | | tt |
d sein
d; +15
Installation width
10.5±1.5
Sealing ring code
Ve160A
Vn170A
V,180A
Vp190A
Vp200A
Vp224A
V,250A
V,280A
Vp300A
V p320A | 0A
V,800A
Vp850A||tt| |V,900A
Vp950A
Vp1000A
Vp1060A
V,1100A
Vp1120A
V,1250A
Vp1320A
V,1350A
Vp1400A
Vp1450A||tt ||V,1500A
Vp1550A
V,1600A
Vp1650A
Ve1700A
V1750A
V,1800A
(1100)
(1200)
(1350)| |tt||(1450)
(1550)
(1 650)
(1750)
shaft diameter d,
155~165
165~175
175~185
185~195
195~210
210~235
235~265||tt ||265~290
290~310
310~ 335
335 ~ 365 | |tt||705~745
745~785
7 85 ~ 830 | | tt | | 830 ~ 875 | | tt | | 875 ~ 920 | | tt | | 920 ~ 965 | | tt | tt||1215~1270
1270~1320||t t||13201370
1370 ~ 1420 ||tt | 720~177G
1770~1820
JB/T 699493
Continued Table 2
Installation width
12.0±1.8
20.0±4.0
Seal ring code
Vp1850A
V,1900A
Vp1950A
Vp2000A
(1850)
(1950)
Shaft diameter d,
1820~1870
1870~1920
1920~1970
1970~2020bzxz.net
JB/T 6994~-93
Continued Table 2
Note: The nominal shaft diameter with brackets is a non-standard size and should not be used as much as possible. 4 Technical requirements
Installation width
20.0±4.0
4.1The rubber material for the V-shaped rubber sealing ring is nitrile rubber or fluororubber. The characteristics and working conditions of different rubber materials shall comply with the provisions of Table 3.
Rubber name
Nitrile rubber SN
Fluororubber
Rubber characteristics
High temperature resistance
The physical properties of the sealing ring shall comply with the provisions of Table 4. Item
Hardness (Shore A type)
Tear strength
Tear elongation
Compression set (hot air, compression rate 20%)Hot air aging:
Hardness change
Tear strength change
Tear elongation change
Circumferential speed
Liquid resistance (nitrile rubber 100×24h, fluororubber 150℃×24h): No. 1 standard oil, volume change
No. 3 standard oil, volume change
Brittle temperature
Not higher than
Working Temperature
40~+100
25～+200
Nitrile rubber
(100C×22h),50
(100C×24h),+10
(100℃×24h),—20
(100×24h),30
Working medium
Oil, water, air
Fluororubber
(200C×22h),50
200℃×24h),0～+10
(200C×24 h),20
(200 c×24h),30
The lip of the sealing ring should be filled, full, flat and smooth. No bubbles, impurities, uneven defects are allowed. 4.3
The appearance quality index of the non-working surface shall comply with the provisions of Table 4 of HG4329. 4.4
The surface roughness R of the sealing ring is 3.2μm, and the surface roughness R of the metal part in contact with the lip is 1.6um. The dimensional tolerance of the sealing ring shall comply with the provisions of M3 grade in Table 1 of GB3672. 5
5 Test method
5.1 The appearance quality of the sealing ring shall be inspected by the daily test method. JB/T6994--93
5.2 The physical performance test of the sealing ring shall comply with the provisions of Article 3.2 of GB7040. 6 Inspection rules
6.1 The product shall be inspected and accepted by the technical inspection department of the manufacturer in accordance with the provisions of this standard and relevant regulations. Qualified products shall be accompanied by a product quality certificate.
6.2 The dimensions of the product shall be sampled according to the provisions of Table 1 and Table 2. The number of random inspections is 2% of the total number of the batch (no less than 5 pieces for each specification). If the inspection result is unqualified, the number should be doubled for re-inspection. If it is still unqualified, it should be checked one by one, and all unqualified products are not allowed to leave the factory. 6.3. The physical properties of the rubber materials used in the product should be inspected according to the items specified in Table 4. If one item is unqualified, double the samples should be taken for re-inspection of the unqualified items. If the re-inspection is still unqualified, the batch of rubber materials is unqualified. 7 Marking, packaging, transportation and storage
7.1 The marking, packaging and transportation of the products shall comply with the relevant provisions of GB5721. 7.2 Storage
7.2.1 The storage environment temperature should be between -15 and 35℃. The relative humidity should not exceed 80%, and the distance must be 1m away from the heat source. 7.2.2 The product is prohibited from contacting with harmful substances such as acids, alkalis, oils and organic agents. 7.2.3
The product shall not be subjected to heavy pressure or damage.
Under the above storage conditions, the manufacturer should ensure that the product can be used within 1.5 years of storage from the date of manufacture. Additional remarks:
This standard was proposed and managed by the Xi'an Heavy Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by Luoyang Mining Machinery Factory. The main drafters of this standard were Gao Song and Li Qilin. 6
People's Republic of China
Mechanical Industry Standard
V-shaped rubber sealing ring
JB/T 699493
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (PO Box 8144, Beijing
Copyright reserved
Postal Code 100081)
No reproduction allowed
Format 880×1230
Edition April 1994
Sheet 5/8
Word count 12.000
First printing in April 1994
Print run 00,0011000
Price 6.00 Yuan
No. 1437
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