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Principle                           
Vacuum Drying Machine uses vacuum pump to pump damp air out and make the working chamber form vacuum status. and let the raw material to be dried at vacuum condition ,Therefore, the drying speed of raw material is improved and the energy is saved greatly. Because the raw materials load inside the tray (standard tray size :640x460x45mm), so It is static vacuum dryer, the form and structure of material can't be damaged when be dried.

Notes: If the material contains a large amount of solvents such as methanol, ethanol, etc. The solvent of raw material can be collected by using a condenser. But the condenser to recollected the solvent that need user to supply cooling water , If the solvent is water or low proportion of solvents , the condenser is not required in order to save investment cost. 

In vacuum drying, the dry materials are placed in vacuum to be heated for drying, and the vacuum pump extracts air and dehumidifies to make the work chamber in a vacuum state, in the meanwhile, the moisture volatilized from the materials is extracted by the vacuum pump, to significantly expedite drying rate of materials and save energy. The condenser (if adopted) can recover the solvent in the materials. The equipment is applicable to cold drying of heat-sensitive materials that are prone to decompose, polymerize or deteriorate at high temperature, and is extensively used in such industries as pharmacy, chemical engineering food, electronics, etc.

Feature
１. Before drying, the treatment of disinfection may be carried out. During the period of drying, there is no impurity material mixed. It is in conformity with the requirement of GMP.

2.The heat source for evaporation may be low pressure steam or surplus heat steam. but the tray model vacuum dryer also can use hot water or thermal oil to as heat source. If client have not heat source. we can design and supply the electrical heating thermal oil or hot water to supply heat source for the Fzg Vacuum Drying Machine.
3. Under vacuum, boiling point of solvent will be reduced, making the evaporator heat transfer driving force increase. Thus for certain amount of heat transfer, it can help to achiever low heat transfer area consumption.
4. It belongs to static dryer. The materials load inside the tray ,So the shape of raw material to be dried should not be destroyed.

5. Highly polished inner and outer surfaces of the machine, no dead comer, easy to clear, no cross contamination. Confining to the requirement of GMP.

6. The heat is indirect. So the raw material can not be polluted. It is in conformity with the requirement of GMP. It is easy in washing and maintenance.

7. Machine materials : AISISUS304 , AISISUS316L, and other material .

8. For the electrical component , we mainly use international brand such as ABB ,Siemens or Schneider.

Advantage
1.Under the condition of vacuum, the boiling point of material solution will reduce. It will increase impetus for heat and mass exchange. Therefore for certain heat exchange amount, it can save heat exchange area of evaporator.
2. The heat source for evaporating operation may be low pressure steam or waster heat steam (If having special requirement, customer may choose water or oil to heat. Our factory can design specially for you).
Suitable for drying thermal sensitive material that is easy to decompose, polymerize or denature.
Before drying, it can carry out disinfections. During the period of drying, any impurity can't be mixed into it.
It is static vacuum dryer, the form and structure of material to be dried can't be damaged.

Application
It is suitable for drying heat sensitive raw materials that can decompose or polymerize or deteriorate at high temperature. It is widely used in pharmaceutical, chemical, foodstuff and electronic industries．