Laboratory Horizontal Type High Vacuum 1200C Tube Furnace With Single Heating Zone
Technical Specifications
GWDL-GA Series 1200°C High Vacuum Tube Furnace – as shown in the figure, the control system and furnace body are integrated. The furnace lining is made of vacuum-formed high-purity alumina lightweight material.
Heating elements are high-temperature alloy resistance wires. This furnace is specially developed for sintering, melting, analysis, and production of ceramics, metallurgy, electronics, glass, chemical industry, machinery, refractory materials, new material development, special materials, building materials, metals, non-metals and other compound materials, primarily for laboratories of universities, research institutes, and industrial/mining enterprises.
The control panel is equipped with an intelligent temperature controller, control power switch, main heating start/stop button, voltmeter, ammeter, and computer interface for easy monitoring of the system's operating status. This product uses reliable integrated circuits, provides a good working environment, and is anti-interference. At maximum temperature, the outer shell temperature is ≤45°C, greatly improving the working environment. Microcomputer program control, programmable temperature profile, fully automatic heating/cooling, and control parameters and programs can be modified during operation – flexible, convenient, and simple to operate.
Temperature control accuracy: ≤±1°C without overshoot. Soaking accuracy: ±1°C. Fast heating rate, maximum ramp rate ≤15°C/min (non-linear).
The furnace chamber material is entirely high-purity alumina – high service temperature, low heat storage, excellent thermal shock resistance, no cracking, no spalling, good insulation (energy saving >60% compared to traditional furnaces). Rational structure, inner and outer double-layer shell with air cooling, significantly shortens the test cycle.
Features:
Control accuracy: ±1°C
Easy operation: Programmable, PID auto-tuning, automatic heating, automatic soaking, automatic cooling – unattended operation. Optional computer communication via RS485/RS232/USB for furnace operation (start, stop, pause, set temperature profile, store profile, historical curves, etc.). Software is provided free of charge – see computer control system.
Furnace tube material: High-purity fused quartz glass tube (SiO₂ ≥ 99.9%).
Pure titanium metal flange sealing (double O-rings).
Furnace body temperature near room temperature.
Dual-loop protection.
Imported refractory material – good thermal insulation, high temperature resistance.
Maximum vacuum degree: 10⁻³ Pa.
Compatible with multiple gases (oxygen, nitrogen, argon, hydrogen, etc.).
Item | Description |
Model | GWDL-GA |
Heating Chamber Dimensions | Diameter 150 mm × Effective heating zone 300 mm |
Furnace Tube Material | High-purity fused quartz glass |
Voltage | 380V |
Power | 6 kW |
Maximum Operating Temperature | 1200°C |
Continuous Operating Temperature | 1150°C |
Control Range | RT – 1200°C |
Temperature Sensor | Thermocouple type K, measuring range 0–1320°C |
Heating Element Installation Position | Around the furnace tube |
Temperature Control Accuracy | ±1°C (integrated circuit control, no overshoot) |
Furnace Temperature Uniformity | ≤ ±5°C (depending on chamber size; multi-zone control can be used for large chambers to achieve better uniformity) |
Heating / Ramp Rate | Adjustable from 1°C/h to 15°C/min (non-linear) |
Heating Elements | High-temperature alloy resistance wire |
Compatible Atmospheres | Multiple gases (oxygen, nitrogen, argon, hydrogen, etc.) |
Vacuum Components
Item | Description |
Vacuum Pump | Mechanical pump + molecular pump unit |
Vacuum Degree | ≤ 10⁻³ Pa |
Pressure Monitoring | One dual-indicator (positive/negative pressure) dial pressure gauge (digital vacuum gauge optional) |
Valves | Imported stainless steel valves (standard / stainless steel / solenoid valve optional) |
Flowmeters | Two mass flow meters, 0–300 mL/min each |
Gas Lines | Clean stainless steel tubing dedicated for gases |
Pressure Protection | System designed to prevent danger caused by closed exhaust port, blocked exhaust port, or excessive furnace tube pressure. Principle: signal from electric contact pressure gauge or pressure sensor drives the control module to close the solenoid inlet valve, activate the solenoid exhaust valve and alarm – thus protecting normal furnace operation. |
Furnace Chamber Opening Method | Hinged top/bottom opening |
Furnace Body | CNC machined, polished, pickled, phosphated, powder-coated and baked at high temperature. Two-color aesthetic finish – anti-oxidation, acid/alkali resistant, corrosion resistant, high-temperature resistant, easy to clean. |
Furnace Structure | Air-cooled double-layer structure with effective airflow guide plates to ensure full cooling circulation. Discharges hot air after cooling the heating element conductors – prevents high-temperature oxidation of conductors and ensures a good working environment. |
Refractory Material | Lining is made of vacuum-formed high-purity alumina lightweight material. High-wear areas (furnace opening, furnace bottom) use lightweight hollow-sphere alumina board. High service temperature, low heat storage, excellent thermal shock resistance – no cracking, no spalling, good insulation (energy saving >80% compared to traditional furnaces). |
Insulation Material | Three-layer insulation: aluminum silicate fiber board, alumina fiber board, alumina (polycrystalline) fiber board – energy saving >80% compared to traditional furnaces. |
Outer Shell Temperature | <45°C under continuous long-term operation |
Protections | Integrated modular control unit with high control accuracy. Dual-loop control and dual-loop protection: overshoot, over-regulation, under-regulation, broken thermocouple, phase loss, overvoltage, overcurrent, overtemperature, current feedback, soft start, etc. |
Control Method | Closed-loop SCR (thyristor) module triggering – phase-shift or zero-crossing control. Continuous adjustment of output voltage, current or power with constant voltage, constant current or constant power characteristics. Inner current loop and outer voltage loop – limits output current within rated range under sudden load or overcurrent conditions, ensuring stable operation and protecting heating elements from excessive current/voltage surges. |
Displayed Parameters | Temperature, segment number, segment time, remaining time, output power percentage, voltage, current, etc. |
Pushbuttons | Imported pushbuttons with >100,000 cycles life and LED indicators. |
Temperature Profile Setting | Intelligent temperature controller with standard PID, APID (Artificial Intelligence PID) or MPT regulation modes. Auto-tuning / self-learning – excellent control without overshoot/undershoot. 30-segment programmable control, arbitrary ramp/soak profiles, with jump (cycle), run, pause, stop commands. Program can be modified during operation. AI algorithm with curve fitting for smooth and accurate profile tracking. |
Multiple Curve Input | One set: 50 segments; two sets: 24 segments each; three sets: 16 segments each |
Computer Interface | RS485, RS232, USB |
Standard Accessories | Two heating elements, two electrode rod sets, one instruction manual, one certificate of conformity, one tube furnace crucible, two insulation plugs, two sealing O-rings |
Included Main Components | The above price includes vacuum flange, water-cooled flange, vacuum pump, standard pressure gauge. Excludes gas control. Gas control can be customized according to customer requirements. |
Warranty & Coverage | One-year free warranty for the furnace (excluding heating elements and furnace tube). Temperature controller, thermocouple, regulator, transformer, and voltage regulator are warranted for two years. Heating elements damaged naturally within three months are replaced free of charge. |
