Sealing material
Design of hydraulic cylinders
The sealing material refers to the combination of basic materials used in the cylinder. Depending on the fluid used or at certain temperatures, the chemical resistance, as well as the wear and friction behaviour of the sealing material must be observed.
| Sealing material | T min in °C |
T max in °C |
Basic materials | Usable fluids |
| PU/ NBR-based (Standard) |
-30 | 100 | PU / NBR / PTFE | Mineral oils DIN 51524 |
| NBR-based | -30 | 100 | NBR / PTFE | Mineral oils DIN 51524 Water HFA - DIN 51502 HFC - DIN 51502 Ultrasafe® series 100 |
| FKM-based | -20 | 200 | FKM / PTFE | Mineral oils DIN 51524 some HFD - DIN 51502 Ultrasafe® series 1000 |
| EPDM-based | -30 | 150 | EPDM / PTFE | Water Some phosphate esters Skydrol® Brake fluid DOT-4 |
| T min | Minimum temperature |
| T max | Maximum temperature |
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