Three Layers Automatic Vacuum Drying Oven for Battery Making Machine (GN-VO-3). Triple Independent Chambers: Three studios work independently with separate heating and temperature control systems. High Vacuum Performance: Reaches 100Pa in 6 hours, maintains 98% vacuum for 12 hours and 95% for 24 hours. Customizable Exterior Color: Cold-rolled plate with spray plastic color available according to customer standards. Flexible Observation Window: Toughened bulletproof double glass allows clear viewing of the working chamber. Nitrogen Injection Capability: Vacuum chamber allows individual nitrogen addition without disturbing other chambers. Comprehensive Safety Protection: Features over-temperature protection with automatic power cut and alarm buzzer. Free Replacement for Shipping Damage: Responsible for damage during shipping and will change damaged parts for free.