F25-F
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.
Manufactured from PTFE or 57 Shore D hardness polyurethane, with an O-ring serving as the preloading element. The PTFE component performs the dust scraping function, while the O-ring maintains uniform contact pressure. It features excellent dry-running performance without stick-slip effect, alongside outstanding chemical and heat resistance (properties vary depending on the O-ring material).
| Surface Roughness | TPU | PTFE | ||
| Rtmax | Ra | Rtmax | Ra | |
| Sliding Surface | ≤ 2.5μm | 0.1–0.5μm | ≤ 2.5μm | 0.05 - 0.3μm |
| Groove Bottom | ≤ 6.3μm | ≤ 1.6μm | ≤ 6.3μm | ≤ 1.6μm |
| Groove Side | ≤ 15μm | ≤ 3μm | ≤ 15μm | ≤ 3μm |
| Bearing area: 50-95% and cutting depth of 0.5 Rz (based on Cref = 0%) | ||||
| Recommended Dimensions (mm) | ||||||
| d | D | OD | G | Rmax | D1 | |
| f8 | H10 | +0.2 | H11 | |||
| Range (mm) | ||||||
| 5 | 11 | d + 4.8 | 1.78 | 3.7 | 0.4 | d + 2.7 |
| 11 | 63 | d + 6.8 | 2.62 | 5 | 1.2 | d + 3.5 |
| 63 | 400 | d + 8.8 | 3.53 | 6 | 2 | d + 4.0 |
| 400 | 600 | d + 12.2 | 5.33 | 8.4 | 2 | d + 6.0 |
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.