| Item | Specification |
|---|
| Main use | Horizontal hydrogen furnace for decarburising anneal, brazing and reduction sintering of Kovar and similar alloys; composed of furnace body, gas system, wet-H₂ unit, water-cooling system and vacuum system. |
| Hot zone (L×W×H) | 350 mm × 350 mm × 1000 mm |
| Max. furnace temperature | ≥ 1600 °C |
| Working temperature | ≥ 1550 °C |
| Temperature uniformity | ≤ ±5 °C (no load, 1000 °C, 30 min dwell) |
| Temperature stability | ±1 °C; PID auto-tuning |
| Control mode | 20+ programmable curves, ≥20 segments each |
| Ultimate vacuum | ≤ −0.09 MPa (gauge) |
| Safety interlocks | Audio / visual alarms for low water/gas pressure, heating anomaly and H₂ explosion-proof devices |
| Process atmosphere | N₂ + H₂ with humidity control |
| Humidifier | Water temperature controllable |
| Thermocouples | Control: W-Re 526; monitor: K-type |
| Pump-down time | ≤ (factory value) min |
| Leak rate | ≤ 0.5 Pa h⁻¹ |
| Max. heating rate | ≥ 20 °C min⁻¹ |
| H₂ pressure | 0.02 – 0.4 MPa |
| N₂ pressure | 0.02 – 0.05 MPa |
| Power supply | 3-phase 380 V / 220 V 50 Hz, 100 kW |
| Cooling water | ≤15 °C (summer), 0.2–0.4 MPa, inlet 1½ in. |
| Overall dimensions | 3 m L × 3 m W × 2.2 m H |
| Net weight | 2200 kg |
Main mechanical parts
Door: head weldment with sight glass, 8-layer radiation shield (4 Mo + 4 SS), water-cooled flange.
Furnace shell: double-wall 304 SS with water jackets, 3-zone ring-type Mo-band heaters, 8-layer cylindrical shield (4 Mo + 4 SS).
Gas system: 304 SS piping, valves, pressure sensors.
H₂ system: dual SS lines, rotameters, burn-off valve, anti-flashback device, safety valve, auto-igniter.
Electrical & control
Cabinet: PLC + 10-inch HMI, C36 Azbil controller, thyristor voltage regulator, transformer, voltage / current meters.
Password “123321” required for parameter changes.
Alarms: over-temp, low cooling flow, pump overloads, regulator fault, low gas pressure; predictive warning before shut-down.
Manual mode: 0–100 % power output available on HMI.
Key components list (abbrev.)
| Item | Qty | Maker |
|---|
| Furnace body | 1 | Chengdu Xin Nan Guang (in-house) |
| Vacuum system | 1 set | idem |
| Direct-drive pump BSV30 | 1 | dedicated supplier |
| Control cabinet | 1 | idem |
| Transformers | 3 | dedicated |
| C36 controller | 3 | Azbil (Japan) |
| Power regulator | 3 | dedicated |
Spare-parts package
6 K-type TCs, 2 seal kits, 2 ceramic insulators, 1 tool set, 30 m power cable, 12 Mo heating elements, 1 Mo loading plate.
Installation notes
Unpack, check list, place on level foundation, reconnect removed parts, leak-check vacuum & gas lines, wire control cabinet, earth ground.
Maintenance & safety
Room must be ventilated, free of open flame and flammables; H₂ detector required if air-conditioned.
Check water/gas tightness and electrical connections periodically.
Keep furnace under vacuum during stand-by; change pump oil regularly.
Use 99.99 % pure process gases; do not exceed rated temperature.
