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Rubber Anti Drain Black Valve for Automotive Oil Filter
Filter Seals

Rubber Anti Drain Black Valve for Automotive Oil Filter

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  • Rubber Anti Drain Black Valve for Automotive Oil Filter
  • Rubber Anti Drain Black Valve for Automotive Oil Filter

Description

Oil fliter Seal material:

NBR,SILICON,VITON as your reuquirement

Moulding gasket or injection gaske as your quanitity and requirement

Oil Fliter and Fuel fliter seals : diaphragm and O ring ,Check valve,external gasket ,bypass valve

 Filter seals :
Gasket seal
Rubber bypass valve
Check valve
Empaque diafagma


The function of the oil filter check valve is mainly manifested in the following aspects:

Preventing oil backflow: When the engine is shut down, the check valve can effectively prevent oil from flowing back from the filter to the oil sump. 

This is mentioned in Reference Information [3], where it is stated that without the check valve, oil will flow back to the oil sump after the engine is shut down. In this case, the engine needs to be filled with oil in the filter before oil can be delivered to the lubrication parts during the next start-up, which leads to dry friction during the start-up period.

Quickly establishing oil pressure: When the engine is restarted, the check valve can prevent oil from leaking out of the filter, 

allowing the oil system to quickly establish oil pressure, ensuring that the lubrication parts of the engine can be immediately lubricated and reducing wear during the start-up process.


Protecting the engine: 

When the filter element of the oil filter is clogged, the check valve can prevent the filtered oil from flowing back due to pressure reversal,

 thus avoiding damage to the engine due to insufficient lubrication.


Maintaining lubrication effect: 

The check valve ensures that oil remains in the filter during the operation and shutdown of the engine, maintaining the continuous lubrication effect of oil on the engine.


The design and quality of the check valve are crucial to the performance of the oil filter, 

as mentioned in Reference Information for the Mann filter check valve, which uses a thick and elastic silicone material to better 

fulfill the function of the check valve

In the oil filter, the check valve is one of the important components that ensure the normal operation of the engine lubrication system,


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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.