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PU
PU seals are primarily designed for use in hydraulic applications. PU material has higher durability compared to NBR material and is able to seal higher pressures. However, due to the NBR material it has a lower quality of abrasion. Polyurethane provides
cuffs a long service life and the ability to withstand harsh environments. Operating temperature -40 °C to +100 °C. PU seals are suitable for hydraulic oils according to DIN 51524 (1-3 and lubricating mineral oils. For HFA and HFB pressure fluids the operating temperature is limited to +60 °C, for HFC to +40 °C.
NBR
Seals made of nitrile butadiene are suitable for hydraulic and pneumatic systems with lower operating pressures. Compared to PU, NBR is not suitable for high pressure seals, but has a higher quality of abrasion and better adhesion with minimal creep. NBR can also be successfully used in pneumatic applications.
Operating temperature -30 °C to +100 °C.
NBR seals are suitable for hydraulic oils according to DIN 51524 (1-3) and lubricating oils mineral oils. For HFA and HFB pressure fluids, the operating temperature is limited to +60 °C, for HFC to +40 °C.