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Valve Stem Seal

Mercedes NB100 Viton Vave Stem seal China Manufacturer
Valve Stem Seal

Mercedes NB100 Viton Vave Stem seal China Manufacturer

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  • Mercedes NB100 Viton Vave Stem seal China Manufacturer
  • Mercedes NB100 Viton Vave Stem seal China Manufacturer

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Mercedes VALVE SEAL8-12/15.4-10.5000 053 36 58 /  12 27214 03Mercedes
MERCEDES9-12/15.4-10.5    9-12/15-9.5 /11000 053 35 58 / 12 27214 03 / 51.04902-0033BENZ（ MAN  51.04902.0033
MERCEDES-BENZ  000 053 3558
MERCEDES-BENZ  000 053 4958
MERCEDES-BENZ  000 053 5358
）70-27214-00
046 109 675A
6610533058
0000533558
MAN  51049020033
MERCEDES-BENZ  6010530158
MERCEDES-BENZ  6010530458
MERCEDES-BENZ  6010530858
MERCEDES-BENZ  6010530958
MERCEDES-BENZ  6010531358
MERCEDES-BENZ  1100530258
MERCEDES-BENZ  1160536058
MERCEDES-BENZ  533558
MERCEDES-BENZ  6010530258
MERCEDES-BENZ  6010530558
MERCEDES-BENZ  6010531258
MERCEDES-BENZ  0000533558
MERCEDES-BENZ  11005301580000534958
Mercedes10.4-15.9-120000531858Mercedes
Mercedes8.8-15-12.9    9-12/15-130000531958Mercedes
Mercedes -0146

Mercedes
Mercedes -0146

Mercedes
Mercedes10-15/19-9/15366 053 01 58Mercedes （352 053 03 96
K?SSBOHRER  8.312.999.264
MERCEDES-BENZ  352 053 03 96
MERCEDES-BENZ  366 053 01 58
）
Mercedes8.5-17.5-10/11.3    8-12/17.5-10.5103 050 0067   /  103 050 01 58   1020530258Mercedes 6010530258
1020531658
0140050073
12-25227-03
Mercedes NB1007-10-6/8000 0534358  /  0000534158 /  6120500058Mercedes NB100
Mercedes10-16.8/19-12000 053 22 58   000 053 27 58    277.338Mercedes
000 053 13 58
Mercedes9.5-17.2-11.21020500158 / 1020500067 / 10205860158Mercedes
1020530358 6010530158 6010530458 1030500158  6010530258
764 027
05427
24-30615-740/0
014 005 0012
014 005 9012
103 050 00 67
103 050 01 58
HR759
12-25227-04
12-25227-03
Mercedes9-15/19-9/15366 053 00 58MERCEDES-BENZ  3410530096
MERCEDES-BENZ  3430530796
MERCEDES-BENZ  3660530058
）

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What factors influence the performance of industry rubber seals

The sealing effect of the sealing ring is related to the material characteristics of the sealing ring. There is also a close influence on other factors. For example, the speed of rotation, working temperature, working pressure, working medium, etc., today I will tell you about the four factors that affect the sealing performance of the sealing ring.

First, the speed of rotation

  When the rotation speed is very low (< 0.03m/s), it is necessary to consider the smoothness of the operation of the equipment and whether the operational appears "crawling" phenomenon. When the movement speed is very high (> 0.8m/s), the lubricating oil film may be destroyed, and the oil seal is not well lubricated and frictions heat, resulting in greatly reduced life. It is recommended that polyurethane or rubber and plastic oil seal work in the speed range of 0.03m/s ~ 0.8m/s. High-speed oil seals need to put forward higher requirements for structure and material, and the speed of household appliances oil seals can reach 20000rpm. Both wear and temperature resistance need to be met, and the concentricity requirements of dynamic sealing on the installation are relatively high.  

Second, the temperature of the working environment

  Low temperature will reduce the elasticity of rubber and plastic oil seals, resulting in leakage, and even the entire oil seal becomes hard and brittle. High temperature will make the oil seal volume expansion, soft, resulting in the oil seal friction resistance increases rapidly and the pressure resistance decreases. It is recommended that the continuous operating temperature range of ordinary polyurethane or rubber and plastic oil seals be -10 ° C to +80 ° C. For the high temperature and high speed requirements of the working environment, we need to choose to use fluorine rubber and PTFE, high temperature resistance and wear resistance is better, the low temperature environment is generally to -40 degrees, and the rubber performance is tested at high and low temperatures to ensure that the product quality meets the requirements.  

Third, the working pressure of machinery

  The oil seal has a minimum service pressure requirement. Oil seals with low friction and low starting resistance should be selected for low pressure work. Below 2.5MPa, polyurethane oil seal is not suitable; High pressure to consider the oil seal pressure deformation, need to use anti-extrusion stop ring, grooving processing also has special requirements.

Fourth, the working medium

  General sealing media are gasoline, oil, diesel, grease, and some static sealing dust. In addition to selecting the working medium strictly according to the manufacturer's recommendations, it is important to keep the working medium clean. Aging or contamination of the oil will not only cause the components in the system to fail, accelerate the aging and friction of the oil seal, but also the dirt in it may scratch or embed the oil seal, making the seal fail. Therefore, it is necessary to regularly check the quality of the oil and its cleanliness, and replace the oil filter or oil according to the maintenance specifications of the equipment. The air remaining in the oil in the cylinder will be compressed by high pressure, which will cause the oil seal to burn out or even carbonize. In order to avoid this situation, exhaust treatment should be carried out at the initial operation of the hydraulic system. The hydraulic cylinder should also run at low pressure and slow speed for a few minutes to confirm that the residual air in the oil has been drained before it can work normally.