Product Overview
The HYD series comprises a steel-plate frame, insulation, a finned-element bank, and a junction box, flanged to the field duct. The inner frame is heat-treated and the outer wall stays ≤50°C. Elements are staggered in layers along the airflow to keep cross-section temperature uniform and avoid the channel effect of a hot center and cool edges.
Power is calculated from airflow and inlet/outlet differential: P(kW) = airflow(m³/h) × ΔT(°C) × 1.2 / 3600, then ×1.15 safety factor. Below 5 m/s, reduce surface load or add area, or element surface temperature may exceed design.
Control includes two-level over-temperature protection: level 1 uses PT100 feedback for PID regulation; level 2 uses an independent high-limit cutout that directly opens the contactor. An airflow switch interlocks with the fan—fan stop cuts power. For precise control, an SCR cabinet varies output continuously with temperature error, avoiding cycling and contactor wear.
Construction Features
- Rectangular/round frame, flanged directly to field duct
- Staggered elements, cross-section ΔT ≤±5°C
- Dual over-temp protection: PID regulation + independent limit cutoff
- Airflow switch interlocked with fan; no flow cuts power
- Outer wall ≤50°C, with 50 mm aluminum-silicate insulation
- Optional SCR cabinet for continuous power control
Technical Specifications
| Rated Power | 3 – 600 kW |
|---|---|
| Rated Voltage | 380V / 415V, 3-phase |
| Frame Material | Galvanized steel / 304 stainless steel |
| Duct Connection | Rectangular 300×200 – 2000×1600 mm / Round Φ200 – Φ800 |
| Outlet Temperature | Ambient – 300°C |
| Air Velocity | 5 – 12 m/s |
| Insulation | 50 mm aluminum-silicate wool |
| Protection | Over-temp, airflow loss, phase loss, short circuit |
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
- Paint-line drying supply air
- Cleanroom reheat
- AHU preheat
- Drying and dehumidification equipment
- Greenhouse and livestock warm-air heating
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
