Product Overview
When the vessel opening is small and immersion depth limited yet significant power is needed, straight-tube layouts often will not fit. The HYW series forms the elements into helical coils, gaining longer heated length at the same immersion depth while distributing heat evenly around the circumference to reduce local temperature differences.
Coil diameter, turns, and pitch are set by vessel ID and liquid level to avoid contact with the wall or exposure above the surface. Where level fluctuates, we recommend low-level protection—exposed elements overheat and fail within tens of seconds.
Surface load is typically 3–4 W/cm², lowered below 2.5 W/cm² for high-viscosity oils, with larger-diameter sheaths to reduce surface temperature. The whole coil is withdrawable, connected by flange or threaded interface, so cleaning needs no pipe disassembly.
Construction Features
- Helical coil structure extends heated length by over 40% at the same immersion depth
- Even circumferential heating keeps tank temperature difference within ±3°C
- Surface load 2.5 – 4 W/cm², suited to oils and high-viscosity media
- Withdrawable design for easy descaling and replacement
- Titanium, 316L, and PTFE coating available for corrosive media
Technical Specifications
| Rated Power | 2 – 120 kW |
|---|---|
| Rated Voltage | 220V / 380V |
| Coil Diameter | Φ200 – Φ900 mm |
| Sheath | Φ12 / Φ16 / Φ20 mm |
| Material | 304 / 316L / Titanium / PTFE |
| Max Temperature | 550°C |
| Mounting | Flange / Threaded / Over-the-side bracket |
| Protection | IP65 |
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
- Deep and narrow-neck vessels
- High-viscosity oil heating
- Electroplating and anodizing tanks
- Pickling and degreasing tanks
- Large liquid-storage tanks
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
