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- gwdlthermo@gwdl.com
Designed for heat treatment processes under vacuum or inert gas protection, this box-type furnace offers precise temperature control and high-temperature uniformity. Suitable for sintering, annealing, and thermal testing in advanced material industries.
The GWDL-ZQLB series vacuum atmosphere box furnace integrates a complete temperature control system, vacuum chamber, vacuum pump, gas delivery system, pressure protection, gas flow control, pressure display (positive/negative), and water circulation system into one unit, with a separate water cooling tank design.
Our vacuum furnace series is engineered for high-precision thermal processing under vacuum or controlled atmospheres.
Based on decades of application data and material performance mapping, we provide fully customizable solutions with temperature ranges from 600°C to 2600°C, supporting up to 7 types of processing atmospheres and modular component integration.
Whether you're processing ceramics, metal alloys, magnetic materials, or advanced composites, our design ensures material compatibility, process safety, and long-term stability.
| Parameter | 1200°C Model | 1400°C Model | 1600°C Model | 1700°C Model |
|---|---|---|---|---|
| Max. Operating Temp. | 1200°C | 1400°C | 1600°C | 1700°C |
| Long-Term Use Temp. | 1150°C | 1350°C | 1550°C | 1650°C |
| Control Range | 50–1200°C | 50–1400°C | 50–1600°C | 50–1700°C |
| Temp. Sensor | K-type thermocouple (0–1320°C) | S-type thermocouple (0–1700°C) | B-type thermocouple (0–1820°C) | B-type thermocouple (0–1820°C) |
| Control Accuracy | ±1°C (no overshooting) | ±1°C (no overshooting) | ±1°C (no overshooting) | ±1°C (no overshooting) |
| Heating Elements | Silicon carbide rods | Silicon carbide rods/ Silicon molybdenum | Silicon molybdenum / molybdenum / tungsten rods | |
| Installation Position | Side-mounted for uniform heating | Installation Position | Side-mounted for uniform heating | |
| Heating Rate | Adjustable: 1°C/h (min, non-leaner) – 40°C/min (max, non-leaner) | |||
| How To Replace The Heating Element | The sealed top cover lifts mechanically and rotates 360°, providing full access while minimizing downtime. | |||
Furnace Construction:
The furnace features a CNC-processed steel body with anti-oxidation coating (double-color design) and double-layer air-cooled structure. The 180° side-opening door mechanism provides easy access, while the refractory lining combines high-purity alumina fiber vacuum-formed panels with alumina hollow sphere boards in high-wear areas. The 4-layer insulation system incorporates alumina fiber cotton, alumina fiber board, alumina polycrystalline fiber board, and imported materials for optimal thermal efficiency.
Cooling System:
Key areas including the furnace mouth, door, and top are water-cooled (water chiller optional), maintaining an external temperature below 45°C during continuous operation. This ensures safe handling and long-term durability.
Vacuum & Atmosphere Control:
The system includes a dual-stage rotary vane pump (standard) with analog pressure gauge (-0.1MPa) and optional digital pressure display. The 6-20mm thick steel shell withstands ±0.1MPa pressure, supporting various gases (H₂, N₂, Ar, CO, O₂) through stainless steel valves and dual ball flow meters (digital mass flow meter optional). A comprehensive pressure protection system with alarms safeguards operations.
Safety Features:
Multiple protection mechanisms include: automatic shutdown and alarms for overpressure (>0.1MPa); optional toxic gas monitors (H₂/CO/O₂) for leak detection; dual-circuit protection for electrical components; emergency venting with auto-releasing exhaust valves; and 4-layer insulation maintaining safe exterior temperatures (<45°C).
Control System:
The advanced control system displays temperature, segment number, time remaining, power output, voltage and current. It offers flexible programming with 50-segment capacity (configurable as 1×50, 2×28, 3×15, or 5×9 segments) and supports PID/APID/MPT control modes with self-tuning. RS485 interface enables PC control and data logging over 1700m range.
Standard Accessories & Service:
The package includes 2 heating elements with mounts, furnace door insulation plug (for 1700°C+ models), crucible tongs, high-temperature gloves, user manual, certificate, and inspection report. The warranty covers 1 year for furnace (3 months for heating elements) with life-long maintenance support. Shipping features triple-layer packaging (foam + plastic wrap + wooden crate) with free domestic urban delivery and transit damage coverage.
Model (TMAX:1200℃) | Chamber Size (mm) | Voltage | Power | Heating Element | Weight |
|---|---|---|---|---|---|
| GWDL-1200ZQLB-4.5L | 200×150×150 | 220V | 4KW | U-SiC Rod | 120kg |
| GWDL-1200ZQLB-12L | 300×200×200 | 380V | 8KW | U-SiC Rod | 140kg |
| GWDL-1200ZQLB-27L | 300×300×300 | 380V | 12KW | U-SiC Rod | 140kg |
| GWDL-1200ZQLB-30L | 500×300×200 | 380V | 15KW | U-SiC Rod | 220kg |
| GWDL-1200ZQLB-45L | 500×300×300 | 380V | 18KW | U-SiC Rod | 240kg |
| GWDL-1200ZQLB-96L | 600×400×400 | 380V | 24KW | U-SiC Rod | 640kg |
| GWDL-1200ZQLB-200L | 800×500×500 | 380V | 35KW | U-SiC Rod | 820kg |
Model (TMAX:1400℃) | Chamber Size (mm) | Voltage | Power | Heating Element | Weight |
|---|---|---|---|---|---|
| GWDL-1400ZQLB-4.5L | 200×150×150 | 220V | 5KW | U-SiC Rod | 140kg |
| GWDL-1400ZQLB-12L | 300×200×200 | 380V | 10KW | U-SiC Rod | 160kg |
| GWDL-1400ZQLB-30L | 500×300×200 | 380V | 15KW | U-SiC Rod | 240kg |
| GWDL-1400ZQLB-45L | 500×300×300 | 380V | 18KW | U-SiC Rod | 460kg |
| GWDL-1400ZQLB-96L | 600×400×400 | 380V | 24KW | U-SiC Rod | 640kg |
| GWDL-1400ZQLB-200L | 800×500×500 | 380V | 35KW | U-SiC Rod | 920kg |
Model (TMAX:1600℃) | Chamber Size (mm) | Voltage | Power | Heating Element | Weight |
|---|---|---|---|---|---|
| GWDL-1600ZQLB-4.5L | 200×150×150 | 220V | 5KW | MoSi₂-1800 | 180kg |
| GWDL-1600ZQLB-12L | 300×200×200 | 380V | 10KW | MoSi₂-1800 | 240kg |
| GWDL-1600ZQLB-30L | 500×300×200 | 380V | 15KW | MoSi₂-1800 | 330kg |
| GWDL-1600ZQLB-45L | 500×300×300 | 380V | 18KW | MoSi₂-1800 | 360kg |
| GWDL-1600ZQLB-96L | 600×400×400 | 380V | 24KW | MoSi₂-1800 | 640kg |
| GWDL-1600ZQLB-200L | 800×500×500 | 380V | 35KW | MoSi₂-1800 | 920kg |
Model (TMAX:1700℃) | Chamber Size (mm) | Voltage | Power | Heating Element | Weight |
|---|---|---|---|---|---|
| GWDL-1700ZQLB-4.5L | 200×150×150 | 220V | 6KW | MoSi₂-1900 | 180kg |
| GWDL-1700ZQLB-12L | 300×200×200 | 380V | 12KW | MoSi₂-1900 | 240kg |
| GWDL-1700ZQLB-30L | 500×300×200 | 380V | 18KW | MoSi₂-1900 | 330kg |
| GWDL-1700ZQLB-45L | 500×300×300 | 380V | 21KW | MoSi₂-1900 | 360kg |
| GWDL-1700ZQLB-96L | 600×400×400 | 380V | 24KW | MoSi₂-1900 | 640kg |
| GWDL-1700ZQLB-200L | 800×500×500 | 380V | 35KW | MoSi₂-1900 | 920kg |
| Optional Additional Functions List | |
|---|---|
| Temperature Controller | Standard model includes 50-segment programmable temperature control. Optional upgrade to high-end imported controller (Model B). Either one can be selected. |
| Touch Screen | 7-inch display with user-friendly Chinese interface. Supports multiple heating profiles, storage of historical curves and data reports. Choose one of four options. |
| IoT Interface | Equipped with RS485 communication port for real-time data read/write, including start, pause, stop, temperature curves, and timing control of the furnace. |
| Computer Control System | Includes both software and hardware. Enables computer-based control of furnace functions such as start/stop, temperature curve setting and reading, parameter adjustment, data logging (measured value, setpoint, output, segment time and number, temperature and power curves). Historical data can be filtered (1s to 1h) and stored long-term. |
| PLC Control System | Controlled via Siemens PLC. Enables read/write of operations including start, stop, temperature curves, timing, atmosphere control, flow rate, digital and analog I/O, power supply and output. Supports integration with upstream/downstream equipment. |
| Observation Port | Installed on the furnace door, made of high-temperature resistant quartz glass for safe and direct observation. |
| Air Inlet | Includes float-type flowmeter and manual valve. Number of flowmeters, maximum flow rate, and gas type are customizable. Either option can be selected.Option 2: Digital mass flowmeter with configurable specifications. |
| Exhaust Port | Manual exhaust outlet (DN30). Either option can be selected.Option 2: Motorized exhaust port that opens/closes automatically based on preset segments in the heating curve. |
| Fully Automatic Intake & Exhaust | Integrates electric intake and exhaust ports with the temperature curve segments via PLC. Allows automatic opening/closing during heating stages. Requires Touch Screen option. |
| Moving Casters | Two swivel casters and two fixed-direction wheels for flexible and stable mobility. |
| Rapid Cooling System | Controlled cooling via frequency converter and centrifugal fan to ensure programmable and efficient cooling. |
| Motorized Upper Door | Motor-driven top-opening furnace door, equipped with foot pedal control for convenience and safety. |
| Quick Discharge Rack (Platform) | Made from high-temperature steel with top layer of wear-resistant refractory bricks. When used with S-function, allows quick transfer of hot materials from furnace chamber to external rack once door opens. |
| Multipoint Temperature Control | Standard heating from both sides; optional upgrades include independent temperature control at door, bottom, rear, and top zones to enhance uniformity. |
| Stirring Fan | Internal metal fan rated up to 1050°C; includes optional frequency converter (1500–2000) and PLC integration for auto activation by temperature segments. |
| Separate Control Cabinet | External control cabinet (1600×600×400 mm) with extended cable (up to 5 meters), separating control system from furnace body for safety and convenience. |
| Regenerative Hearth | Furnace base lowered by 50mm with hollow structure and reinforced with multi-point support and firing plate. Increases structural strength and adds 5% to cost. |
| Tail Gas Treatment System | Optional VOC treatment furnace for exhaust gas purification. Available capacities: 40 m³/h and 80 m³/h. |
| Corrosion-Resistant Chamber | Chamber lined with materials resistant to acid, alkali, and hydrofluoric acid corrosion for harsh processing environments. |
| Heating Element Protection | Heating elements equipped with protective housing to prevent contamination from powders and corrosive vapors. |
| Clean Furnace Chamber | Internal surfaces protected with ceramic, high-temp glass, or special metal to minimize dust and volatile residue, ensuring clean processing environment. |
