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Vacuum Shelf Tray Dryer

FZG series vacuum shelf tray dryer is the most often used chamber dryer for drying powder, small granule and slurry materials under vacuum condition

1. Drying powder, small granule and slurry materials under vacuum condition, especially for those materials which are heat sensitive, easy oxidized, toxic and the moisture is organic solution and need to be recovered; 

2. Drying tray: 4-48 trays 
3. GMP design 
5. Heat source: steam or hot water 

Product Description

FZG series vacuum shelf tray dryer is a most often used static chamber dryer under vacuum condition. Inside the drying chamber, trays loaded with wet material are placed on top of each other in a drying shelf. 

In drying pocess, heat medium, such as steam, hot water or thermal oil, is connected to the drying shelf which transfers heat to wet material. Under vacuum condition, boiling point of moisture is much lower. So the moisture can be evaporated under low temperature. The vacuum pump constantly sucks out the evaporated moisture to speed the drying process. Vacuum pump, tubular condenser and buffer tank are equipped to recover the evaporated moisture. 


Working principle 


Drying shelf and tray 

Technical Features 

1) Flexibility in heat medium: Heat mediums can be steam, hot water or thermal oil to obtain different temperature according to special drying requirements.
2) Uniform drying: Four exhaust vents are equipped to make sure the evaporated moisture can be sucked out immediately.
3) Energy saving: The boiling point of moisture is much lower under vacuum. Low drying temperature can reach high evaporation rate.
4) GMP standard: Drying chamber is fully welded without dead corners to meet GMP standard.


Drying chamber 


Hinge and hand wheel 


Drying shelf 


Vacuum system 

Typical applications
dried bay leaves_副本

Bay leaves 


Heat sensitive chemicals 

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Herb extract 


Q: What information should be provided in order to get a proposal or quotation? 

A: Our vacuum shelf tray dryer can be specially designed according to specific material and capacity. Before we can work out a detailed proposal or quotation, we have to know the following information: 

1) What wet material you are going to dry 

2) Moisture content before drying

3) Final moisture content in dried product 

4) Drying capacity in kg/day 

5) What heat source you are going to use 

6) Recommended drying temperature 

Q: How the machine will be delivered ? 

A: The machine is packed in wooden boxes for shipping 

Q: What kind of after sale service you can provide? 

A: We have professional after sale service team who can reach you in short notice. They can supervise the installation, do commissioning and train your workers. 

Q: What standard models do you have? 

A: We have the following standard models: 

Model  YZG-600 FZG-10 FZG-15 FZG-20 
Inner dimension mm Φ600x976 1500x1060x1220 1500X1400X1220 1500X1800X1220
Outer dimension mm  1135x810x1020 1924x1720x1513 1513X1924X2060 1924X2500X1513
Shelf layer   4 5 8 12
Shelf space  mm  81 122 122 122
Tray size  mm  310x600x45 640x460x45 640X460X45 640X460X45
Tray quantity  4 20 32 48
Shelf working pressure Mpa  ≤0.784 ≤0.784 ≤0.784 ≤0.784
Shelf working temp.  ℃ 35-150 35-150 35-150 35-150
Vacuum degree  Mpa  -0.1 -0.1 -0.1 -0.1

Water evaporation rate under -0.1 Mpa and 110 ℃  kg/m2. hr 

7.2 7.2 7.2 7.2
Vacuum pump with condenser  2X-15A/2KW 2X-70A/5.5KW 2X-70A/5.5KW 2X-90A/7.5KW
Vacuum pump without condenser SZ-0.5/1.5KW SZ-2/4KW SZ-2/4KW SZ-2/5.5KW
Drying chamber weight  kg  250 1400 2100 3200