A20-R
TvnSeal Engineering Plastics Technology Co., Ltd. is a national high-tech enterprise specializing in the R&D and manufacturing of high-performance sealing materials and special polymer new materials.
Compact piston seal with a space-saving structure, suitable for standard O-ring grooves. Compared with O-rings, it features an integrated active back-up ring for high-pressure service. The interference fit on the outer diameter prevents twisting during dynamic operation.
| Surface Roughness | Rtmax | Ra |
| Sliding Surface | ≤ 2.5μm | ≤ 0.05-0.2μm |
| Groove Bottom | ≤ 6.3μm | ≤ 1.6μm |
| Groove End Face | ≤ 15μm | ≤ 3μm |
| Additional Notes: Support Rate: 50-95%, Cutting Depth 0.5R (based on the reference condition of Cref=0%) | ||
| Standard Dimensions | ||||||||
| D | d | G | Rmax | C | s* | |||
| H9 | h9 | +0.2 | ||||||
| Static | Dynamic | |||||||
| Range (mm) | ||||||||
| 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 | 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 above are valid at 70°C; if the operating temperature is higher, smaller gap values shall be adopted. 1）Tolerance is +0.2 mm when d ≤ 40 mm; tolerance is +0.4 mm when d > 40 mm. | ||||||||
Applications
Chemical Industry
Used in pumps, valves, and piping systems for chemical processing plants.
Pharmaceutical
FDA-compliant seals for drug manufacturing and processing equipment.
Food Processing
Sealing solutions for food and beverage processing machinery.
Oil & Gas
High-pressure seals for oil drilling and refining equipment.
Automotive
Engine and transmission seals for automotive applications.
Aerospace
Precision seals for aerospace and aviation equipment.