ZQLB Series 1400℃ Vacuum Atmosphere Box Furnace integrated with vacuum, gas circuit & water cooling system, air-cooled structure, ±1℃ accuracy, multiple protective atmospheres for sintering & heat treatment.
The ZQLB series vacuum atmosphere box-type electric furnace, as shown in the figure, integrates a temperature control system, vacuum furnace chamber, vacuum pump, gas circuit, pressure protection, gas flow control, positive and negative pressure display, and water circulation pump into one unit. The water circulation tank and the furnace body are of a powder material structure. The furnace lining is made of vacuum-formed lightweight alumina material.
It uses electric heating elements as the heating elements; it is a specialized device designed for laboratories in higher education institutions and research institutes, as well as industrial and mining enterprises, for sintering, melting, analyzing, and producing ceramics, metallurgy, electronics, glass, chemicals, machinery, refractory materials, new material development, special materials, building materials, metals, non-metals, and other chemical compound materials.
The control panel is equipped with an intelligent temperature regulator, control power switch, main heating start/stop buttons, voltage and current meters, a computer interface, a water pump switch, a vacuum pump switch, a gas flow meter, positive and negative pressure gauges, an electric contact pressure gauge, and valves, so that the operating status of the system can be observed at any time. This product adopts a reliable integrated circuit, provides a good working environment, and is resistant to interference. During operation, the outer shell temperature of the furnace body is ≤40°C, greatly improving the working environment. With microcomputer program control, programmable curves, automatic heating/cooling, and the ability to modify temperature control parameters and programs during operation, it is flexible, convenient, and simple to operate.
Temperature control accuracy: ±1°C with no overshoot. Constant temperature accuracy: ±1°C. The heating rate is fast, with a heating rate of ≤45°C/min.
The furnace chamber material is made of vacuum-formed lightweight alumina material, which offers high operating temperature, low heat storage, resistance to rapid heating and cooling, no cracking, no slagging, and good insulation performance. The structure is reasonable, with inner and outer double-layer furnace jackets and air cooling for heat dissipation, which can greatly shorten the test cycle.
| Item | Specification |
|---|---|
| Rated Operating Temperature | 1400℃ |
| Long-term Working Temperature | 1350℃ |
| Temperature Control Range | 50~1400℃ |
| Temperature Measuring Element | Type S Thermocouple, 0-1700℃ |
| Heating Element | SiC Rod / Si-Mo Rod |
| Heating Element Installation Position | Both sides (Imported Model 1800 Si-Mo heating element) |
| Temperature Control Accuracy | ±1℃ (Integrated circuit control, no overshoot) |
| Heating Rate | Freely adjustable, Max.40℃/min, Min.1℃/h |
| Furnace Body | CNC machined, polished, grinded, pickled, phosphated, powder coated and baked. Two-tone design, beautiful appearance, anti-oxidation, acid & alkali resistance, corrosion resistance, high temperature resistance and easy cleaning |
| Furnace Structure | Air-cooled double-layer furnace structure to guarantee good working environment |
| Door Opening Method | Axial 180° side opening |
| Chiller | Optional for customer |
| Water Cooling Area | Furnace mouth, door and top of inner chamber shell |
| Vacuum Pump & Vacuum Degree | Two-stage direct rotary vane vacuum pump; -0.1Mpa pointer pressure gauge, digital positive/negative pressure indicator |
| Pressure Resistance | Furnace plate thickness 6-20mm, double-sided welding, withstand positive pressure 0.1Mpa |
| Gas Valve | Stainless steel valve |
| Pressure Detection | 1pc pointer gauge for positive & negative pressure (digital vacuum gauge optional) |
| Gas Flowmeter | 2pcs float flowmeter; digital mass flowmeter optional for higher precision |
| Pressure Protection | Signal from electric contact pressure gauge/sensor. System closes inlet valve, opens exhaust valve and triggers audible & visual alarm to release overpressure and protect furnace |
| Gas Leakage Alarm | Detect hazardous gas concentration indoor. Auto shut down furnace, cut gas supply and activate exhaust upon over-limit. Optional |
| Process Atmosphere | Hydrogen, Nitrogen, Argon, CO, Oxygen, etc. |
| Refractory Material | Lining: vacuum molded alumina fiber lightweight board; lightweight hollow sphere alumina plate for easily-impacted furnace bottom. Low heat storage, thermal shock resistance, no cracking or slag falling, good insulation |
| Thermal Insulation Material | Four-layer insulation: alumina fiber blanket, alumina fiber board, polycrystalline alumina fiber board with excellent energy saving performance |
| Shell Temperature | ＜45℃ during long-term non-stop operation |
| Protection | Integrated modular control unit, dual-loop control & dual-loop protection. Protection: overshoot, over-regulation, under-regulation, thermocouple break, phase loss, overvoltage, overcurrent, overtemperature, current feedback, soft start |
| Control System | Closed-loop SCR module with phase-shift trigger. Continuously adjustable voltage/current/power, constant voltage/current/power. Double-loop current limiting to protect heating elements from surge impact |
| Display Parameters | Temperature, segment No., segment time, remaining time, output power percentage, voltage, current, etc. |
| Temperature Curve Setting | Intelligent temperature controller with PID, APID, MPT. Auto-tuning & self-learning, no overshoot/under-regulation. 30-segment program control, adjustable heating/cooling slope, cycle jump, run/pause/stop. Program editable during operation, AI curve fitting for smooth profile |
| Multi-curve Input | 30 segments (customizable to 50 segments). 1 curve:30(50)seg; 2 curves:14(28)seg each;3 curves:9(15)seg each;5 curves:5(9)seg each. Multiple curves stored and called arbitrarily |
| Communication Interface | RS485 interface, max. communication distance 1700m. PC remote start/pause/stop, curve setup & reading, parameter setting. Store historical curves/reports, recording interval 1s~1h, long-term storage |
| Standard Accessories | 2 heating elements, 2 sets rod fixtures, 1 crucible tongs,1 pair high temperature gloves |
| Warranty | One-year free warranty for whole furnace. Heating elements excluded; free replacement for natural damage within 3 months |
.webp)
