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- gwdlthermo@gwdl.com
Multi-zone temperature control: 3 independent zones ensure ±10℃ uniformity.
The GWDL-JR series pit-type furnace is specially designed for research institutes, universities, and industrial enterprises for the sintering, melting, analysis, and production of ceramics, metallurgy, electronics, glass, chemicals, machinery, refractories, new materials, special alloys, and other metallic and non-metallic compounds.
The furnace body and lid are made of vacuum-formed high-purity alumina lightweight insulation material, while the furnace bottom adopts a refractory brick structure with excellent load-bearing capacity.
Equipped with high-temperature alloy resistance strips (with molybdenum, up to 1450℃ surface temperature) as heating elements, it ensures reliable long-term operation.
The control system features multiple temperature control zones, a 7-inch touchscreen, programmable PID control with up to 50 heating/cooling segments, historical data storage, and report generation. With multi-point control and protective corundum-mullite shielding plates, the system offers stable performance, precise temperature uniformity, and enhanced service life.
| Category | Parameters (1000℃ Model) |
|---|---|
| Model | GWDL-JR |
| Rated Voltage | 380V, 50Hz |
| Control Voltage | 220V |
| Rated Temperature | 1000℃ |
| Operating Range | 50–1200℃ |
| Thermocouple | K-type, 0–1320℃ |
| Heating Element | High-temperature alloy resistance strip (with molybdenum), surface temp. up to 1450℃ |
| Heating Element Layout | Surrounding furnace chamber, protected by corundum-mullite guard plates |
| Temperature Accuracy | ±1℃ |
| Temperature Zones | 3 independent zones (upper, middle, lower) |
| Temperature Uniformity | ±10℃ (multi-point control for larger chambers) |
| Heating Rate | 1℃/h – 20℃/min adjustable |
| Furnace Lid | Hydraulic lifting mechanism |
| Furnace Structure | CNC processed carbon steel, double-layer air cooling |
| Refractory Lining | Vacuum-formed alumina insulation + mullite reinforcement at loading areas |
| Insulation Layer | Triple-layer: Al₂O₃ fiber, alumina fiber, polycrystalline alumina fiber (total 350mm) |
| Furnace Shell Temp. | ≤45℃ during long-term operation |
| Control Mode | Thyristor (SCR) closed-loop trigger control with overcurrent, overvoltage, overload protections |
| Touchscreen | 7-inch HMI, curve storage, historical data, reporting |
| Program Control | Up to 50 segments (multi-curve storage & recall) |
| Display Parameters | Temperature, zone number, remaining time, output power %, voltage, current |
| Protection | Dual-loop safety: over-temp, overvoltage, phase loss, overcurrent, sensor breakage, etc. |
