VACUUM FURNACE

Equipment model and technical parameters 

Model: GWDL-VAF 

Maximum/Long-term Temperature: 1800°C / 1600°C (for long-term operation) 

Temperature control range: 50 – 1800°C 

Temperature control accuracy: ±1°C 

Temperature uniformity of the furnace: ±2°C 

Heating rate: Adjustable. Fastest: 20°C per minute (non-linear), Slowest: 1°C per hour (non-linear) 

Temperature sensing element: C-type thermocouple (0 - 2300°C) 

Furnace dimensions: 300 × 200 × 200 mm (depth × width × height) 

Heating element: High-purity tungsten sheet (uniformly distributed around the furnace chamber) 

Heat insulation and preservation: 10-layer metal reflective screen (3 aluminum + 2 copper + 2 stainless steel 310S + 3 stainless steel 304)

Vacuum system: 

Pre-stage pump: Double-stage vane pump (ZX-70, 70 L/s) 

Main pump: Molecular diffusion pump (1500 L/s) 

Limit vacuum level: 6.67×10⁻⁴ Pa (no load) 

Work vacuum degree: 6.67×10⁻³ Pa 

Equipped with digital resistance vacuum gauge and ionization vacuum gauge. 

Piping system: 

Allowable gas: Nitrogen 

Equipped with a gas flow meter, nitrogen gas can be introduced at high temperatures (≥800°C) to maintain the pressure inside the furnace (100-1000 Pa). 

It features dual pressure detection and protection with positive pressure (≤0.1 MPa) and negative pressure, and is equipped with audible and visual alarms. 

Water cooling system: 

304 stainless steel double-layer water-cooled furnace body, with flanges at the inlet and outlet ports. 

Equipped with a 3P water-cooling unit, it features water cut-off protection and emergency cooling functions. 

Furnace structure: 

It is made of 304 stainless steel and has a side-opening furnace door. 

CNC machining, surface treatment is corrosion-resistant, and the furnace shell temperature is ≤ 45°C (with water cooling).