The Napco 5851 is a laboratory and production vacuum oven delivering precise temperature and vacuum control for extended operational periods. This stainless steel chamber maintains temperatures from 35°C to 200°C and achieves vacuum levels to 30″ Hg when paired with an adequate external pump. The 1.6 cu. ft. (42.5 L) chamber features two adjustable shelves with 1.25 sq. ft. capacity per shelf, usable dimensions of 12″W × 19″D × 12″H, and integral controls for evacuation, vacuum regulation, and atmospheric bleeding. A vacuum gauge indicates chamber pressure in inches of mercury, while a thermometer well on the top rear accommodates standard glass column thermometers for direct temperature monitoring.
Technical Specifications
• Chamber capacity: 1.6 cu. ft. (42.5 L)
• Usable internal dimensions: 12″W × 19″D × 12″H
• External dimensions: 19.75″W × 27″D × 22.5″H
• Vacuum range: Atmosphere to 30″ Hg
• Temperature range: 35°C to 200°C
• Shelf capacity: 1.25 sq. ft. per shelf
• Standard shelves supplied: 2
• Power consumption: 1000 W at 120 VAC, 50/60 Hz, 8.3 A
• Weight: 116 lbs
– Key Features
• Stainless steel construction requiring standard corrosion prevention maintenance
• Bottom-mounted heating elements; direct floor contact must be avoided to prevent thermal damage
• Adjustable shelving with clips and standards for flexible sample positioning
• Temperature control knob with heating indicator light
• Hose connections accept minimum 1/4″ vacuum tubing
• Integrated valves for chamber evacuation and controlled atmospheric bleed
• Thermostat adjustment capability; recalibration may be necessary for sub-100°C operation
– Typical Applications
Laboratory drying, outgassing, and controlled thermal processes. Production batch applications requiring simultaneous temperature and pressure regulation.
– Compatibility & Integration
Requires external vacuum pump with capacity adequate for the 30″ Hg maximum vacuum specification. Standard 1/4″ vacuum tubing and 120 VAC, single-phase electrical supply required.
