| Surface roughness | Rtmax | Ra |
| Sliding surface | ≤ 2.5 µm | 0.1–0.5 µm |
| Trough bottom | ≤ 6.3 µm | ≤ 1.6 µm |
| Trough side | ≤ 15 µm | ≤ 3 µm |
| Bearing area: 50-95% and 0.5 Rz cutting depth (based on Cref = 0%) | ||
| Recommended size mm | Maximum gap mm | |||||||
| D/H9 | d/h9 | L/+0.25 | Rmax | C | s* | |||
| ＞ | ≤ | ＞ | ≤ | |||||
| 8 | 100 | - | - | D - 2.70 | 4.5 | 0.2/0.41) | 2 | H9/f8 |
| 100 | 150 | 8 | 20 | D - 4.36 | 6.5 | 0.2/0.41) | 2 | H9/f8 |
| 150 | 250 | 20 | 40 | D - 6.00 | 7.4 | 0.2/0.41) | 3.0 | H9/f8 |
| 250 | 400 | 40 | 100 | D - 9.06 | 10.1 | 0.2/0.41) | 3.5 | H9/f8 |
| 400 | 600 | 100 | 300 | D - 11.88 | 12.8 | 0.2/0.41) | 4.5 | H9/f8 |
| 600 | 300 | 600 | D - 17.00 | 17.5 | 0.2/0.41) | 5 | H9/f8 | |
| The extrusion gap values shown in the table above apply to temperatures below 70°C. Higher temperatures require lower extrusion gaps. | ||||||||
| Operating parameters | ||||||
| Material | Temperature | Speed | Pressure | |||
| Sealing components | Retaining ring | Minimum °C | Maximum °C | Maximum m/s | Maximum bar (MPa) | |
 NBR |
|
–30 | +100 | 0.5 | 700 (70) | |
 HNBR |
–25 | |||||
 FKM |
|
–20 | +200 | |||
| HNBR |
–25 | +150 | ||||
POM
PTFE g| Ordering example | |
| Introduction | Piston seal TK20-R |
| D x d x L [mm] | 100 x 95.64 x 6.5 |
| Sealing material | NBR/POM |
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