Uses thermal oil as the heat transfer medium with a spiral coil structure for high-efficiency heat transfer. Integrated into 5 functional skid modules (heater body, circulation pump, expansion, storage, and return oil valve skids). Features staged combustion and flue gas recirculation technology. Full automation capability: auto start/stop, automatic load adjustment, 24/7 unattended operation. Thermal Efficiency: 94% Design Pressure: 1.0–2.5 MPa Fluid Temperature Rise: 40°C–100°C Rated Flow: ≤1,200 m³/h NOx Emissions: ≤50 mg/Nm³ (air temp ≤200°C) Main Applications: Long-distance pipelines, oilfield gathering, NGL recovery, crude stabilisation, tank heating, chemical process gas heating