Freeze Dry Systems

FreeZone Freeze Dry Systems are designed to handle the lyophilization needs of research and pilot plant laboratories. Benchtop and mobile console models are offered. Collectors that reach -50° C are available with capacities from 1 to 18 liters. Cascade systems in 2.5, 6 and 12 liter collector capacities that reach -84° C are ideal for freeze drying samples with low eutectic temperatures including ones containing acetonitrile. Other cascade systems with 4.5 liter capacities reach -105° C, which are suitable for samples containing dilute methanol and ethanol.

Ease of use.
FreeZone Freeze Dry Systems were designed to provide simplicity of use and convenience.
• With automatic start up, pressing one button initiates collector refrigeration and vacuum. Vacuum pull down is delayed to allow sufficient time for the collector to cool
ensuring that moisture is trapped by the collector to protect the pump from contamination.
• Lighted “wave” graphs display amber then green to indicate when temperature and vacuum levels are right for adding samples.

Durability.
FreeZone Systems have several features designed to protect the system and vacuum pump.
• The patented moisture sensor protects the vacuum pump by preventing refrigeration or vacuum start-up when moisture is detected in the collector chamber.
• The vacuum break valve protects the system from oil backstreaming during power outages.
• Models are available that include a PTFE**-coated collector chamber and coil for processes involving corrosive compounds.
• The purge valve, available on FreeZone 6, 12 and 18 Liter Console Systems, allows the vacuum pump to be run after freeze drying is complete so that contaminants may be purged from the oil.
• Lighted “wave” graphs display amber then green to indicate when temperature and vacuum levels are right for adding samples.

• The LCD provides easy-to-read digital readouts of vacuum in mBar, Pa or Torr and temperature in ° F or ° C. It also displays service information such as total number of hours of refrigeration and vacuum pump operation and total number of hours since the refrigeration and vacuum pump were serviced.
• The vacuum control valve helps to speed evaporation of solvent samples by maintaining the vacuum level.
• The audible/visual alarm alerts the user to abnormal system events. Alarm messages are displayed on the LCD.
• The upright collector chamber makes defrosting easy. All models may be manually defrosted by pouring water into the upright chamber to melt the collected ice. Some models include a built-in hot gas defrost that melts the collected ice. When the defrost function is selected, hot gas from the compressor is circulated through the collector coil. The defrost feature automatically shuts off when the refrigerant leaving
the collector coil reaches +65° C (+149° F). A collector drain hose allows convenient emptying of the melted ice.
• The rear-mounted RS-232 port simplifies connection to a personal computer for operation verification. The time between data transmissions may be set to occur at 10, 30, 60, 300 or 600 second intervals.*• Lighted “wave” graphs display amber then green to indicate when temperature and vacuum levels are right for adding samples.