ISO VG 680 high-viscosity PCTFE inert lubricant. It replaces hydrocarbon lubricants in low-speed, high-load bearings, gearboxes and pumps in reactive-media environments such as oxygen and chlorine. No flash point — nonflammable. Korea stock available, ready to ship.
Per HQ TDS. Product number 700 = kinematic viscosity (cSt) at 37.8°C.
| Viscosity @ 37.8°C (100°F) | 700 cSt |
| Viscosity @ 71.1°C (160°F) | 62 cSt |
| Viscosity @ 98.9°C (210°F) | 17 cSt |
| ISO viscosity grade | 680 (approx.) |
| Density @ 37.8°C | 1.95 g/mL |
| Pour point | 5°C (40°F) |
| Cloud point | 13°C (55°F) |
| Flash point / Fire point | None (nonflammable) |
| Appearance | Colorless clear liquid |
| Chemical family | PCTFE (high molecular weight) |
It forms an ISO VG 680-class oil film near room temperature, and as the operating temperature rises the viscosity stabilizes quickly (17 cSt at 99°C). It combines high-load protection at start-up with low churning resistance in normal operation.
700 is the second-highest viscosity in the series. If you need a higher viscosity, consider 1000N; for low-temperature environments (below 5°C), consider 200 or 400.
| Grade | Viscosity (cSt @37.8°C) | Pour point | Typical applications |
|---|---|---|---|
| 27S | 27 | Low | Instrumentation · high-speed rotating parts · low temperature |
| 56S | 56 | Low | Compressor · general bearings |
| 200 | 200 | -12°C | Medium-load bearings · valves |
| 400 | 400 | -9°C | High-load bearings · gears |
| 700 | 700 | +5°C | Low-speed, high-load bearings · gearboxes |
| 1000N | 1000 | +10°C | Maximum-load · ultra-low-speed rotating parts |
Avoid contact with alkali metals such as sodium and potassium, amine-based additives, liquid fluorine and liquid chlorine trifluoride (ClF₃). Operating temperature limit 260°C (500°F). Avoid use on aluminum / magnesium surfaces subject to high shear forces (threaded fasteners, etc.). Review the MSDS before application — the latest genuine HQ TDS/MSDS/COA is provided immediately on request below.
Tell us your process conditions (media, temperature, load, materials) and we will reply within 24 business hours with the optimal grade and a quote. Genuine HQ product supplied direct, with batch traceability.
