Heat Transfer Oil for Asphalt Plants - DNS Trans 30 & DNS Trans 100

1. General Introduction to Heat Transfer Oil and Asphalt Plants

Heat Transfer Oil is a specialized industrial oil used in closed-loop heating systems, ensuring stable and uniform heat supply for production processes.
In asphalt mixing plants, heat transfer oil plays a crucial role in heating bitumen, drying aggregates, and maintaining stable temperatures for hot mix asphalt.

Selecting high-quality Heat Transfer Oil Asphalt ensures safe operation, energy savings, and extended equipment lifespan.

2. DNS Trans 30 & DNS Trans 100 by Denis Oil (with imported additives)

Two recommended heat transfer oils for asphalt plants are:

• DNS Trans 30: refined mineral-based oil, viscosity grade ISO VG 32, fast heat transfer, excellent oxidation resistance.
• DNS Trans 100: refined mineral-based oil, viscosity grade ISO VG 100, superior thermal stability, reduced sludge formation, extended oil life.

These are specialized Heat Transfer Oils for Asphalt Plants, developed by Denis Oil to meet the demanding requirements of hot mix asphalt production.

3. Key Technical Features

• DNS Trans 30 Film Temperature Limit: 280 - 300 °C.
• DNS Trans 30 Bulk Temperature Limit: 280 - 320 °C.
• DNS Trans 100 Film Temperature Limit: 300 - 320 °C.
• DNS Trans 100 Bulk Temperature Limit: 300 - 340 °C.
• High oxidation stability: minimizes sludge, coke, and resin formation.
• High flash point: safe operation, reduced fire risk.
• Stable viscosity: ensures continuous circulation and efficient heat transfer.
• Excellent thermal stability: maintains oil quality for long-term use.

4. Benefits of Using High-Quality Heat Transfer Oil for Asphalt Plants

• Stable temperature control: ensures uniform asphalt mixture meeting construction standards.
• Extended equipment lifespan: reduces corrosion, scaling, and fouling in heaters and pipelines.
• Lower operating costs: less frequent oil changes, reduced maintenance expenses.
• High safety: minimizes risks of overheating and fire hazards during production.

5. Suitable Types of Heat Transfer Oil for Asphalt Plants

• Mineral Oil: DNS Trans 30, DNS Trans 100 - economical, widely used, suitable for most systems.
• Synthetic Oil: PAO, Alkyl Benzene - withstands up to 330 °C, long service life, ideal for high-capacity asphalt plants requiring continuous operation.
• Other popular brands: Godiva, Shell Heat Transfer S2, Total Seriola 1510, Mobil Therm 605, Caltex Texatherm 46…

6. Technical Recommendations for Use

• Expansion tank: positioned ≥6 m above the highest system point, oil temperature in tank <53 °C.
• Oil flow velocity: ≥1.5 - 3 m/s (below 300 °C), >3 m/s (above 300 °C).
• Regular testing: every 6 months (acid number, viscosity, flash point).
• Oil replacement procedure: proper draining, flushing, and refilling from the lowest system point.
• Backup generator: maintain pump operation during power outages to prevent localized overheating.

7. Practical Applications of Heat Transfer Oil Asphalt (DNS Trans 30 - DNS Trans 100)

• Asphalt Mixing Plants: heating bitumen, drying aggregates, maintaining asphalt mixture at working temperature.
• Construction materials industry: cement, bricks, hot mix asphalt production.
• Chemical & polymer industry: plastic drying, composite manufacturing.
• Metallurgy & mechanical engineering: closed-loop thermal oil systems.
• Textile industry: thermal oil stenters and fabric drying systems.