The National Appliance National 5851 is a vacuum oven designed for laboratory and production applications requiring precise simultaneous control of vacuum and temperature over extended operating periods. The unit features an all-stainless steel chamber that resists corrosive atmospheres and prevents contamination—critical for chip drying, electronic component handling, and similar sensitive processes. A full-view observation window (8″ square, 1/2″ thick tempered glass) with vacuum-rated gasketing enables real-time process monitoring without breaking the seal.
Technical Specifications
• Chamber: All-stainless steel construction, 0.4 ft³ capacity
• Observation Window: 8″ square, 1/2″ thick tempered glass, gasketed for vacuum sealing
• Gaskets: High heat-resistant silicone standard; Buna-N for volatile hydrocarbon resistance; Viton-B for acid resistance
• Vacuum Gauge: 0″ to 30″ range
• Temperature Control: Adjustable calibrated thermostat with contact heating elements
• Vacuum/Bleed Adjustment: Two metering valves for fine control
• Thermometer: Glass thermometer included
• Vacuum Port: 1″ IPS-capped penetration port (compatible with external vacuum, purge, and pump-down/back-fill systems)
• Leak Rate: 0.2 per 24 hours
• Recommended Pumping Rate: 60 liters per minute free air capacity
• Insulation: 2 inches fiberglass
• Exterior Finish: Epoxy-polyester hybrid powder coating; almond body with gray control panel
• Weight: 42 lbs (Model 5831)
– Key Features
• Integrated vacuum gauge and thermostat dial on front control panel
• Dual metering valves enable independent vacuum and bleed rate adjustment
• Low leak rate supports extended hold-time operations
• 1″ IPS port accepts standard vacuum system connectors
• Optional extra shelf (Part Number 96995) expands workspace
– Typical Applications
• Semiconductor component drying
• Electronic assembly processing
• Corrosive-atmosphere operations requiring stainless steel construction
• Extended thermal hold operations
– Compatibility & Integration
Standard silicone gaskets ship with the unit. Buna-N and Viton-B gasket options are available to match specific chemical exposure requirements. The 1″ IPS penetration port integrates with most laboratory vacuum systems without adapter requirement.
