There are indeed many rubber raw materials for making oil seals, such as nitrile rubber, fluorine rubber, hydrogenated nitrile rubber, silicone rubber, AEM and so on.

But the choice of which raw material to make oil seals is based on the requirements of the use of oil seals indicators to choose. The use environment of oil seal is hot oil state, it needs to be resistant to temperature and oil.

1、Silicone rubber is not oil resistant, does not meet the requirements, eliminated;

2, if the working part of the temperature is low, generally within 120 degrees, then optional NBR, the relative price is also appropriate;

3, if the temperature exceeds 120 degrees, you need to choose ACM, but its petrol resistance is not good, more processing problems, compression time will be deformed. The oil seal made of ordinary ACM material is easy to produce oil leakage under high speed operation. AEM can be considered.

4, if the requirements are higher, the cost is more lenient, fluoroelastomer is the best choice. Now tens of dollars on the fluorine rubber rubber, such as cost restrictions on the basic solution to the problem, the fluorine rubber is very cost-effective.

5, if the requirements are higher, such as seals inside the oil well, you can only use hydrogenated nitrile rubber.

NBR and FKM rubber materials to do the most common oil seals, occupying the high and low-grade areas; ACM and AEM to do the oil seals in the market area is growing; HNBR is to do the ultra-high-level oil seals of professional rubber materials; silicone rubber heat-resistant although powerful, but is not suitable for doing the oil seals!