The performance index of the  Laboratory series freeze dryer is bench-top type, small volume, light weight, multi-function, stable performance, high accuracy of the test system, preferably a multi-purpose machine, which can adapt to the freeze-drying experiment of various materials. The main division methods of the experimental series of freeze dryers are:
1, from the structure
l Bell-type freeze-drying machine: the freeze-drying chamber and the cold trap are separate upper and lower structures, and the freeze-drying chamber has no pre-freezing function. This type of lyophilizer requires manual operation when it is transferred to the drying process after the material has been pre-frozen. Most of the experimental freeze dryers are bell-type, which has a simple structure and low cost. Most of the freeze-drying chambers use a transparent plexiglass cover to facilitate the observation of the lyophilization of the material.
l In-situ freeze-drying machine: the freeze-drying chamber and the cold trap are two independent chambers. The shelf in the freeze-drying chamber has a cooling function. After the material is placed in the freeze-drying chamber, the material is pre-freezing and drying without manual operating. This type of freeze dryer has a complicated manufacturing process and high manufacturing cost. However, the in-situ freeze dryer is the development direction of the freeze dryer, and is an ideal choice for lyophilization process, especially suitable for medicine, biological products and other special products. Freeze dried.
a, common type b, multi-manifold type c, gland type
2, from the functional points
Ordinary shelf type: The material is bulk in the material tray and is suitable for lyophilization of food, Chinese herbal medicine and powder materials.
With gland type: suitable for drying of Xilin bottled materials. When lyophilizing, prepare the materials in the vials as needed, float the caps and freeze-dry them. After drying, operate the gland mechanism to compact the caps. It can avoid secondary pollution, re-adsorb moisture, and is easy to store for a long time.
Multi-manifold type: The flask is attached to the outside of the drying chamber, and the material frozen on the inner wall of the bottle is dried. At this time, the flask is connected as a container to the manifold outside the drying box, and the material in the flask is heated at room temperature, and the mixture is heated. The tube switch device can be removed or loaded at any time as needed without stopping the machine.
With pre-freezing function type: material pre-freezing process, cold trap as pre-freezing chamber pre-freezing material, in the drying process, the cold trap is a water trap, capturing the moisture overflowing the material. The lyophilizer with pre-freezing function, the pre-freezing and drying of the materials in the freeze-drying process are all completed on the lyophilizer, and the lyophilizer has high use efficiency, which saves the cost of the low-temperature refrigerator.

Options : 

Vacuum control valve  
Intake backfilling filter

Air inlet filter for pump      

Nitrogen inflation valve

Eutectic point test device        

Electricity heating defrosting

Exhaust filter/oil mist filter for pump

Cascade refrigeration ,condenser temperature -80ºC     

Check valve for pump to prevent oil sucked into chamber

Leybold pump or other international brand vacuum pump

RS232 and software: Check and keep freeze drying data , control freeze dryer through computer

Special requirements can be customized

Package: strong plywood case, suitable for shipping by sea , by air

Main Features: 

*Control panel display in English

*Vacuum can be displayed in Pa or mbar

*Condenser with uniform and good ice capture function

*Acrylic drying Chamber is safe and easy to view sample status

*Small and compact structure , with easy and convenient operation

*Vacuum pump with high pumping speed , to reach good final vacuum

*Big opening condenser with external coiling tubes, has pre-freezing function

*Color LCD touch screen displays running time, display sample temperature, condenser temperature ,  

  vacuum degree, and save data automatically

*Display sample temperature curve, condenser temperature curve and vacuum curve

*CFC-free refrigerant, international famous brand compressor, low noise,good efficiency

*Condenser, trays, drying shelf and pre-freezing shelf are made of stainless steel 304, anti-corrosion

*Stainless steel air inlet valve (drain valve) is safe, anti-corrosion , no leak  

*With USB port to output freeze drying data, open and view data in Excel format

Technical parameters : 
 

LGJ-10 top press type freeze dryer is used for freeze drying experiment in laboratory.
It is bench top equipment, suitable for drying products in bulk, in vial.