Laboratory 1000C Vacuum Atmosphere Box Type Muffle Furnace With Quartz Glass Liner
The GWDL-ZQLB Series 1000°C vacuum atmosphere box furnace integrates a temperature control system, vacuum furnace chamber, vacuum pump, gas circuit, pressure protection, gas flow control, positive/negative pressure display, and water circulation pump. The water circulation tank is integrated with the furnace body. The furnace lining insulation is made of vacuum-formed high-purity alumina lightweight aggregate material.
It uses high-temperature alloy resistance wires (molybdenum-containing) as heating elements. This furnace is specially developed for laboratories in universities, research institutes, and industrial and mining enterprises to sinter, melt, analyze, and produce ceramic, metallurgical, electronic, glass, chemical, mechanical, refractory, new material development, special material, building material, metal, non-metal, and other compound materials.
The control panel is equipped with an intelligent temperature controller, power switch, main heating start/stop button, voltmeter, ammeter, computer interface, water pump switch, vacuum pump switch, gas flow meter, positive/negative pressure gauge, electric contact pressure gauge, and valves for real-time monitoring of system operation. The product adopts reliable integrated circuits with good working environment and anti-interference performance. The furnace shell temperature is ≤40°C at maximum temperature, greatly improving the working environment. Microcomputer program control supports programmable temperature curves, fully automatic heating/cooling, and flexible parameter/program modification during operation, making it simple to operate.
Temperature control accuracy: ±1°C, no overshoot
Constant temperature accuracy: ±1°C
Fast heating rate: maximum ≤25°C/min
The furnace chamber insulation is entirely made of vacuum-formed high-purity alumina lightweight aggregate material, featuring high operating temperature, low heat storage, resistance to rapid heating and cooling, no cracking or spalling, and excellent thermal insulation (energy saving over 60% compared with traditional furnaces). With a reasonable structure and double-layer air-cooled furnace shell, it significantly shortens the test cycle.
Main Technical Parameters
Item | 1000℃ Model |
Model | GWDL-1000XB |
Power Supply (AC) | 380V |
Maximum Operating Temperature | 1050℃ |
Long-term Operating Temperature | 1000℃ |
Control Range | 50–1200℃ |
Temperature Measuring Element | Type K thermocouple, measuring range 0–1320℃ |
Heating Element Installation | Around the furnace liner; high-temperature alloy resistance ribbon (molybdenum-containing), surface temperature up to 1380℃ |
Temperature Control Accuracy | ±1℃ (integrated circuit control, no overshoot) |
Temperature Uniformity | ±1℃ (depends on furnace chamber size; multi-point control available for large chambers, optional) |
Heating Rate | Adjustable freely; max. 20℃/min (non-linear), min. 1℃/h |
Rapid Cooling | Built-in rapid cooling system; variable-frequency fan blows cold air between vacuum liner and insulation layer for fast cooling |
Heating Element | High-temperature alloy resistance ribbon, installed inside furnace liner |
Furnace Liner Material | 310S stainless steel |
Discharge Rack | Customized per customer requirements (optional) |
Furnace Body | CNC machined, polished, pickled, phosphated, plastic powder coated, and high-temperature baked; dual-color, attractive appearance, oxidation-resistant, acid/alkali-resistant, corrosion-resistant, high-temperature resistant, easy to clean |
Furnace Structure | Advanced international air-cooled double-layer structure for a safe working environment |
Door Opening | Axial 180° side opening; door rotates 360° to prevent arm burns during high-temperature material handling |
Door Locking | Standard manual screw locking; electric locking available (customizable) |
Water Cooling | Imported high-temperature circulating water pump (heat resistance up to 160℃, continuous operation >1 year) and 304 stainless steel circulating water tank (150–200L, optional) |
Water Cooling Parts | Furnace mouth and door of inner liner |
Circulating Water Radiator | Multi-channel pure aluminum water-cooled fins to reduce overheating |
Vacuum Pump & Vacuum Level | Two-stage direct rotary vane vacuum pump; 6.67×10⁻² Pa |
Power Regulation | IGBT DC power supply |
Vacuum Display | Analog pressure gauge (-0.1 MPa relative) + digital resistance gauge (absolute) |
Pressure Resistance | 6–20 mm thick furnace steel plate, double-sided welded; positive pressure resistance 0.098 MPa |
Gas Circuit Valves | Imported stainless steel valves |
Pressure Detection | One dual-pointer positive/negative pressure gauge |
Gas Flow Meter | Two float flow meters (size optional); high-precision mass flow meter available (optional) |
Pressure Protection | Prevents hazards from blocked vents or overpressure. Signals from electric contact pressure gauge or sensor trigger control module to close intake solenoid valve, open exhaust solenoid valve and alarm, release pressure, and activate audible/visual alarm for safe operation |
Gas Leakage Alarm | Detects toxic/hazardous gas concentration; triggers system shutdown, closes gas source, opens vents/exhaust fan for safety (required for hydrogen atmosphere, optional) |
Applicable Atmospheres | Hydrogen, nitrogen, argon, carbon monoxide, oxygen, etc. |
Refractory Material | Vacuum-formed high-purity alumina lightweight aggregate; lightweight hollow-sphere alumina plates at easily bumped areas (furnace mouth, bottom). High temperature resistance, low heat storage, thermal shock resistance, no cracking/spalling, energy saving over 80% vs. traditional furnaces |
Insulation Material | Three layers: aluminum silicate fiber board, alumina fiber board, polycrystalline alumina fiber board; energy saving over 80% vs. traditional furnaces |
Furnace Shell Temperature | <45℃ during continuous long-term operation |
Protection System | Integrated control module with high precision; dual-circuit control and protection: overshoot, over-temperature, under-temperature, thermocouple break, phase loss, over-voltage, over-current, current feedback, soft start, etc. |
Control System | IGBT DC power supply |
Display Parameters | Temperature, segment number, segment time, remaining time, output power percentage, voltage, current, etc. |
Buttons | Imported buttons with LED indicators, service life >100,000 operations |
Temperature Curve Programming | Intelligent controller with standard PID, APID, MPT; auto-tuning, self-learning, no overshoot/undershoot. 30 segments (customizable to 50) for programmable ramp/hold/cool; jump (cycle), run, pause, stop; editable during operation; smooth curve via AI algorithm |
Multi-Curve Input | 30 segments (50 optional); supports 1×30, 2×14(28), 3×9(15), 5×5(9) segment configurations; multiple curves storable and callable |
PLC | Siemens S7-200 |
Standard Accessories | One crucible tongs, one pair of high-temperature gloves, one DVD data disc |
Warranty | One-year free warranty; heating elements not covered (free replacement for natural damage within 3 months) |
Options | Touch screen control system for real-time recording of temperature, cooling, and pressure curves |
Notes | 1. Recommended max. heating/cooling rate: 10–20℃/min (fast heating shortens element life) 2. Minor cracks in furnace chamber after use are normal and repairable with alumina coating 3. Prevent high-temperature solution leakage onto furnace bottom; use backing plate or alumina powder 4. Install in well-ventilated, non-humid area |
Packing List | One furnace, one crucible tongs, one pair of high-temperature gloves, one data disc, one manual, one certificate, one factory inspection report, one delivery note |
