What’s the main material of skeleton seal?

Generally speaking, the materials often used for skeleton oil seals are nitrile rubber, fluorine rubber, silicone rubber, and PTFE because of their good self-lubricating properties, especially when bronze is added. , Stephan, etc.

Nitrile-butadiene rubber (NBR): wear-resistant, oil-resistant (cannot be used in polar media) Temperature resistance: -40~120℃.

Hydrogenated nitrile rubber (HNBR): wear resistance, oil resistance, aging resistance, temperature resistance: -40 ~ 200 ℃ (stronger than NBR temperature resistance).

Fluorine rubber (FKM): acid and alkali resistance, oil resistance (all oil resistance), temperature resistance: -20~300℃ (oil resistance is better than the above two).

Polyurethane rubber (TPU): wear resistance, aging resistance, temperature resistance: -20~250℃ (good aging resistance and excellent).

Silicone rubber (PMQ): heat resistance, cold resistance, small compression set, low mechanical strength, temperature resistance: -60~250℃ (excellent temperature resistance).

Polytetrafluoroethylene (PTFE): good chemical stability, acid and alkali resistance, oil and other media, wear resistance, high temperature resistance, high mechanical strength and good self-lubrication.