Product Overview
Thermal oil can be heated above 300°C at atmospheric pressure—low system pressure, no water treatment—ideal where high temperature is needed without a steam boiler. The unit comprises a circulation pump, heating vessel, expansion tank, filter, valves/instruments, and control cabinet, skid-mounted for shipment; on site only process piping and power connect.
Inside, an immersion bundle heats oil entering at the bottom and leaving at the top, with velocity held at 1.5–2.5 m/s to avoid local overheating and oil cracking. The expansion tank also stores oil and vents; its volume is 1.2× the system oil charge and must sit above the highest system point.
Control uses outlet temperature as feedback to regulate SCR output, while monitoring return temperature, flow, and pump status; on over-temperature or flow loss it stops heating first, then the pump after a delay to dissipate residual heat. Before commissioning, the oil must be boiled/vented, ramping to 120°C to remove moisture and avoid spit-out during operation.
Construction Features
- Atmospheric high-temperature operation up to 350°C, no water treatment
- Skid package with pump, expansion tank, filter, and control cabinet
- SCR control, outlet temperature accuracy ±1°C
- Velocity 1.5 – 2.5 m/s, avoids local oil cracking
- Over-temp stops heating first, delays pump to protect oil
- Optional plate heat exchanger for secondary-side heating
Technical Specifications
| Rated Power | 30 – 1000 kW |
|---|---|
| Rated Voltage | 380V / 415V, 3-phase |
| Max Outlet Temp | 350°C |
| Design Pressure | 0.6 MPa (atmospheric system) |
| Circulation Pump | Vertical inline pump / canned pump |
| Control Accuracy | ±1°C |
| Expansion Tank | 1.2× system oil charge |
| Heat Medium | Mineral / synthetic thermal oil |
The table lists typical configuration ranges. Special pressure, temperature or media conditions require re-checking; final parameters are confirmed by the approved drawings and technical agreement.
Typical Applications
- Reactor jacket heating
- Hot presses and laminators
- Paint curing tunnels
- Asphalt heating and holding
- Textile finishing machines
Information Needed for Selection
- Medium name, concentration, and whether it contains particles
- Total medium volume or circulation flow rate
- Initial and target temperature
- Required heat-up time
- Vessel or pipe size and material
- Supply voltage, phases, and available capacity
- Installation environment and hazardous-area requirements
- Connection standard and mounting orientation
