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The GWDL-VAF Series 1700℃ Vacuum Atmosphere Furnace is defined by its core features: "1700℃ high temperature" and "fully automatic temperature control". It adopts molybdenum wire heating elements paired with a vacuum-formed high-purity alumina furnace chamber, achieving a temperature control/constant temperature accuracy of ±1℃.
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As shown in the figure, the GWDL-VAF Series 1700℃ Vacuum Atmosphere Furnace integrates a temperature control system, vacuum furnace chamber, vacuum pump, gas path, pressure protection, gas flow control, positive/negative pressure display, and water circulation pump. The water circulation tank is separated from the furnace body. The furnace lining is made of vacuum-formed high-purity lightweight alumina material.
It uses molybdenum wire as the heating element and is a specialized device developed for laboratories in colleges and universities, research institutes, as well as industrial and mining enterprises. It is designed for sintering, melting, analysis, and production of materials such as ceramics, metallurgy, electronics, glass, chemicals, machinery, refractory materials, new material development, special materials, building materials, metals, non-metals, and other compound materials.
The control panel is equipped with a touchscreen and PLC intelligent control system, enabling intelligent temperature adjustment. It controls the power supply, main heating operation, voltage, current, water pump, vacuum pump, gas flow, positive/negative pressure, pressure contact gauge, and valves—allowing real-time monitoring of the system’s working status. This product adopts reliable integrated circuits, ensuring a good working environment and strong anti-interference capability. The surface temperature of the furnace body is ≤40℃ even at the maximum temperature, significantly improving the working environment. With microcomputer program control, it supports programmable temperature curves and fully automatic heating/cooling. During operation, temperature control parameters and programs can be modified, offering flexibility, convenience, and simple operation.
The furnace chamber is entirely made of vacuum-formed high-purity lightweight alumina material, featuring high service temperature, low heat storage, resistance to rapid heating and cooling, and excellent thermal insulation performance. It has a reasonable structure with inner and outer double-layer furnace sleeves and air-cooled heat dissipation, which can greatly shorten the test cycle.
| Temperature | 1700℃ |
| Model | GWDL-1700VAF |
| Voltage (AC) | 380V |
| Designed Power | 10-90KW |
| Furnace Chamber Size (mm) (L×W×H) | 300×200×200; 300×300×300; 500×300×200; 500×300×300; 400×400×400; 600×400×400; 500×500×500; 800×500×500; 600×600×600; 900×600×500; 800×600×600; 700×700×700; 1000×600×600; 1000×700×700; 800×800×800; 1200×800×800 |
| Temperature Control Accuracy | ±1℃ (integrated circuit control, no overshoot) |
| Control Range | 50℃ to 1700℃ |
| Temperature Uniformity Inside Furnace | ±3℃ (varies by heating chamber size) |
| Temperature Measuring Element & Range | Thermocouple with 分度 number B, measuring range 0-1820℃ |
| Heating Rate | Adjustable freely. Range: Maximum 20℃/min (non-linear); Minimum 1℃/h |
| Heating Element | High-purity molybdenum wire |
| Installation Position of Heating Element | Evenly distributed on both sides of the furnace chamber |
| Furnace Body | Processed by CNC machine tools, with surface treatments including polishing, grinding, pickling, phosphating, plastic powder spraying, and high-temperature baking. Features novel and attractive appearance, with advantages of oxidation resistance, acid and alkali resistance, corrosion resistance, high-temperature resistance, and easy cleaning. |
| Furnace Body Structure | Double-layer water-cooled structure, ensuring a good working environment |
| Furnace Door Opening Method | Side-opening |
| Surface Temperature of Furnace Body | ≤45℃ during long-term continuous operation |
| Water Cooling | 3P refrigeration unit |
| Water-cooled Parts | Around the outer shell |
| Vacuum Pump | Two-stage direct rotary vane vacuum pump |
| Vacuum Degree | -0.1MPa |
| Pressure Resistance | The furnace chamber steel plate is 6-20mm thick, with double-sided welding, capable of withstanding positive pressure of 0.1MPa |
| Gas Path Valves | Imported stainless steel valves |
| Pressure Detection | 1 pointer pressure gauge with dual indication (positive pressure & negative pressure); 1 digital pressure gauge with dual indication (positive pressure & negative pressure) |
| Gas Flow Meter | 2 float flowmeters (0-5L/min each) |
| Exhaust Port | 1 |
| Pressure Protection | Designed to prevent hazards caused by closed exhaust port, blocked exhaust port, or excessive furnace chamber pressure. Principle: Signals are obtained by a pressure contact gauge or pressure sensor, which drives the control module to close the electromagnetic intake valve, activate the electromagnetic exhaust valve and alarm. Pressure is released through the exhaust port, and the sound and light alarm buzzer is triggered to ensure the normal operation of the furnace. |
| Applicable Atmospheres | Hydrogen, Argon |
| Hydrogen Treatment | Ignition device |
| Hydrogen Detection | 1 set |
| Refractory Material | The furnace lining is made of 1800-grade vacuum-formed alumina light material. Positions prone to collision during material handling and load-bearing positions (furnace mouth, furnace bottom) adopt light hollow spherical alumina plates, featuring high service temperature, low heat storage, resistance to rapid heating and cooling, and good thermal insulation performance. |
| Thermal Insulation Material | Four-layer insulation, including alumina fiber cotton, alumina fiber board, alumina polycrystalline fiber board (imported materials) |
| Protection System | Adopts integrated module control unit with high control accuracy. Equipped with dual-circuit control and dual-circuit protection, featuring overshoot, undershoot, thermocouple break, phase loss, overpressure, overcurrent, overtemperature, current feedback, and soft start protection. |
| Control System | Adopts closed-loop thyristor module trigger control with phase-shift trigger mode. Output voltage, current, or power is continuously adjustable, with constant voltage, constant current, or constant power characteristics. The current loop is the inner loop, and the voltage loop is the outer loop. When a sudden load is applied or the load current exceeds the current limit, the output current of the voltage regulator is limited within the rated current range to ensure the normal operation of the output and voltage regulator. Meanwhile, the voltage loop also participates in regulation to maintain the stability of output current and voltage within the rated current range (with sufficient adjustment margin). This protects the heating element from excessive current and voltage impact, achieving safe, reliable control and high control accuracy. |
| Display Parameters | Temperature, temperature segment number, segment time, remaining time, output power percentage, voltage, current, etc. |
| Buttons | Imported buttons with service life over 100,000 times, equipped with LED indicators |
| Temperature Curve Setting | Touchscreen intelligent temperature controller |
| Multiple Curve Input | 30-segment program control function. Adjustable input: 1 curve (30 segments); 2 curves (14 segments each); 3 curves (9 segments each); 5 curves (5 segments each). Multiple curves can be input simultaneously and called freely during use. |
| Communication Interface | RS485 communication interface |
| Warranty Scope & Period | Free warranty for the furnace: 1 year. Heating elements are not covered by warranty (free replacement for natural damage within 3 months). |
| Random Spare Parts | 2 heating elements, 2 sets of rod holders, 1 crucible tong, 1 pair of high-temperature gloves |
| Packing List | 1 furnace, 2 heating elements, 2 sets of rod holders, 1 crucible tong, 1 pair of high-temperature gloves, 1 instruction manual, 1 certificate of qualification, 1 factory inspection report (acceptance report), 1 sales delivery note |
