Vacuum dryer EMV series

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High-capacity EMV vacuum dryers for large carpentries and timber traders
EMV discontinuous vacuum dryers with net capacities ranging from 6 to 50 m3, designed for large carpentries and timber merchants requiring high-productivity wood drying with controlled quality.

Operation and process
The system uses low-temperature vacuum cycles to evaporate water from wood without thermal shocks that cause cracks or deformations. A steam generator maintains surface humidity while a condenser controls the ambient-to-wood humidity gradient by precipitating suspended vapour. Air conditioning is achieved by alternating-flow fans, deflectors and a hot-water heated finned-tube battery that increases circulating air temperature and initiates water transmigration from cell interior to surface. Condensate is periodically drained to stabilise chamber conditions.

Advantages of EMV high-capacity systems

• FAST DRYING: vacuum, low-temperature cycles enable humidity reduction rates often superior to conventional systems.
• OPTIMAL PRODUCT QUALITY: minimal cracking, warping or colour changes; preservation of mechanical properties.
• CAPABLE OF DRYING: very thick sections and very wet timber (boards, semi-finished items).
• LOW OPERATING COSTS: reduced thermal losses and efficient use of thermal and electrical energy.
• LOW MAINTENANCE COSTS: rational, simple construction and anticorrosive materials.

Main features

• Autoclave: epoxy-coated steel; optional AISI 304 stainless steel for corrosive species; insulated lining with pre-coated sheet-steel.
• Electric control panel with microprocessor and dedicated control computer; PC connectivity for parameter adjustment and cycle archiving.
• Humidity and temperature probes for wood monitoring.
• Motor-driven extractor trolley and external guidance for extraction.
• Condensate circuit and heating unit: stainless steel finned tubes.
• Hydraulic vacuum pump with condensate handling; hot-water circulation pump; steam generator for surface humidification.
• Alternating-flow fans, deflectors and gearmotor-driven agitators to generate air turbulence inside the autoclave.

Installation requirements

• Electrical supply (f.e.m. socket).
• Cold water supply.
• Drain well for condensate discharge.

Capacity / dimensional summary
Em6V — Net capacity: 6.5 m3; Installed heating ~6.5 kW (20000 Cal); Electrical absorption ~7 kW/h.
Em8V — Net capacity: 8 m3; Installed heating ~9 kW (30000 Cal); Electrical absorption ~10 kW/h.
Em12V — Net capacity: 12 m3; Installed heating ~11 kW (50000 Cal); Electrical absorption ~13 kW/h.
Em20V — Net capacity: 19 m3; Installed heating ~25 kW (100000 Cal); Electrical absorption ~22 kW/h.
Em25V — Net capacity: 25 m3; Installed heating ~28 kW (150000 Cal); Electrical absorption: data model-dependent.
Em50V — Net capacity: 44 m3; Installed heating ~37.5 kW (300000 Cal); Electrical absorption: data model-dependent.

Technical specifications (summary)

• Series: EMV discontinuous vacuum dryers (6–50 m3).
• Autoclave materials: epoxy-coated steel or optional AISI 304 stainless steel for corrosive woods.
• Control: microprocessor panel with dedicated computer, PC connectivity, cycle programming and archiving.
• Sensors: humidity and temperature probes for wood.
• Thermal systems: stainless steel finned-tube heating and condensate circuits; steam generator for surface humidification.
• Vacuum system: hydraulic vacuum pump with condensate management and periodic draining.
• Air handling and agitation: alternating-flow fans, deflectors and gearmotor-driven agitators.
• Auxiliaries: motorised extractor trolley, external extraction control, hot-water circulation pump, humidification system.