Single Helical Coil (HC Series) Thermal Fluid Heater
Helical Coil Thermal Fluid Heaters
Enerquip’s helical coil thermal fluid heaters provide dependable process heating in a compact, cost-effective design. Available in both Single Helical Coil (HC) and Double Helical Coil (DHC) configurations, these systems are engineered to support a wide range of industrial heating applications while offering flexible installation options and reliable long-term performance.
Compare HC and DHC Series Heaters
| Feature | Single Helical Coil (HC Series) | Double Helical Coil (DHC Series) |
|---|---|---|
| Capacity Range | 1.3-13 MM BTU/hr | 2.1-16 MM BTU/hr |
| Number of Coils | 1 | 2 |
| Thermal Efficiency | 70-75% | 83-88% |
| Standard Orientation | Horizontal | Vertical |
| Coil Repairability | Requires replacement of entire coil assembly | Inner coil can be completely removed and replaced |
| Max Operating Temperature | Up to 400°F | 550°F+ |
Standard Features on Both Helical Coil Heaters
- Radiant heating coil: Helically wound, ASME code compliant, made from schedule 40 carbon steel
- Emissions options: Standard NOx (60-130 ppm), Low NOx (<30 ppm), Ultra Low NOx (<9 ppm)
- Burner: High-efficiency gas-fired burner with burner management system (BMS)
- Fuel train: Pre-piped and pre-wired for natural gas and/or alternate fuels
- Recirculation pump
- Control panel: NEMA 4 with integrated safety features and alarms; optional NEMA 4X with app connectivity for remote diagnostics
- Heating medium: Thermal oil, water, or blended fuels
- Process performance: Designed for 24/7 continuous operation, continuous spiral flow path
- Tank stand: Available upon request in various custom sizes
- Expansion tank: 250 to 3,000 gallons with optional nitrogen blanketing
- Optional start-up support: Includes review of installed work and piping, supervision of system fill and oil circulation, burner tuning, testing of circuits and safety devices, operator training for monitoring and safe operation, and troubleshooting as required
Single Helical Coil (HC Series)
The HC Series uses a single helically wound coil and is designed for applications where footprint, simplicity, and upfront investment are key considerations.
Benefits of the HC Series
- Compact design for facilities with limited installation space
- Cost-effective solution for lower heat load requirements
- Reliable performance for continuous industrial operation
- Available in horizontal or vertical configurations
- Ideal for projects where budget and footprint are primary drivers
Double Helical Coil (DHC Series)
The DHC Series incorporates a double helical coil arrangement that increases heat transfer efficiency and supports higher operating temperatures.
Benefits of the DHC Series
- Thermal efficiency of 83-88%
- Supports operating temperatures exceeding 550°F
- Greater heat transfer performance
- Designed for larger process heating demands
- Well suited for applications where operating efficiency is a priority
Enerquip also offers serpentine coil thermal fluid heaters with an integrated economizer, capable of 85–90% efficiency.
Talk with an Engineer
Not sure whether the single or double helical coil is the better fit for your application?
Enerquip’s engineering team can evaluate your process requirements, operating temperatures, available footprint, fuel source, and heat load to recommend the right helical coil thermal fluid heater for your facility.
Request a quote to discuss your application with our team.
