Product Description
KATMOTO HEAT TRANSFER 320 is a highly refined mineral heat transfer (thermal) oil based on an ISO VG 32 base oil, for closed-loop indirect heating systems operating at bulk temperatures up to approximately 320°C. Its excellent thermal and oxidation stability, high flash and autoignition temperatures and efficient heat-transfer properties resist thermal cracking, sludge and coking for long, safe and efficient service in thermal-fluid systems.
Key Performance Features
| High thermal stability
resists thermal cracking and coking at high bulk temperatures (to ~320°C). |
Oxidation resistance
resists oxidation and sludge in closed-loop thermal systems. |
| Efficient heat transfer
low viscosity and good thermal conductivity for efficient heat exchange. |
High flash / autoignition
high flash and autoignition temperatures for operating safety margin. |
| Long fluid life
stable performance reduces fouling and extends thermal-fluid life. |
Clean system operation
minimises deposits on heater coils and heat exchangers. |
Applications & Performance Level
| Applications | Closed-loop indirect thermal-oil heating systems (heaters, presses, reactors, calenders) operating at bulk oil temperatures up to approximately 320°C and film temperatures within the fluid limit. |
| Specification | DIN 51522 (Q) — heat transfer oil standard. ISO 6743-12 L-QB — heat transfer fluid classification. High-temperature service — suitable for bulk temperatures up to ~320°C. Thermal-crack resistant — resists cracking and coking in closed systems. High flash/autoignition — operating safety margin for thermal systems. |
| OEM Suitability | Closed-loop thermal-oil heating systems specifying a DIN 51522 Q / ISO L-QB mineral heat transfer oil. Follow the heater manufacturer’s maximum bulk and film temperature limits. |
| Important Notice | Respect the system’s maximum bulk and film temperature limits and ensure proper circulation to avoid local overheating. ”Suitable for” does not mean official approval. |
| Property | Test Method | Target Typical Value |
| Appearance / Color | Visual | Clear bright liquid |
| ISO Viscosity Grade | ISO 3448 | ISO VG 32 |
| Kinematic Viscosity @ 40°C | ASTM D445 | 32.0 mm²/s |
| Kinematic Viscosity @ 100°C | ASTM D445 | 5.4 mm²/s |
| Viscosity Index | ASTM D2270 | 100 |
| Flash Point, COC | ASTM D92 | ≥ 200°C |
| Fire Point | ASTM D92 | ≥ 215°C |
| Autoignition Temperature | ASTM E659 | ≥ 350°C |
| Pour Point | ASTM D97 | -12°C |
| Max. Bulk Temperature | — | ≈ 320°C |
| Conradson Carbon Residue | ASTM D189 | ≤ 0.05 % mass |
Note: The target values above are typical product values for reference only; final production data is subject to the official KATMOTO Technical Data Sheet (TDS) and laboratory test report.
