Working Principle: 

FZG Vacuum Shelf Dryer ( also called Vacuum Tray Dryer, Vacuum Chamber Dryer) is the most commonly used static chamber dryer under vacuum condition. Inside the drying chamber, trays loaded with wet materials are placed on the drying shelf. 

In drying pocess, heating medium, such as steam, hot water or thermal oil, is forced to circuate inside the drying shelf to transfer the heat to wet material. Under vacuum condition, the boiling point of water or solvent is much lower which makes low temperature drying feasible and effective.The vacuum pump constantly extracts the evaporated moisture as vapor to speed the drying process. Tubular condenser is equipped to recover the evaporated moisture.

FZG Vacuum Shelf Dryer is good at drying various kinds of wet materials with low temperature: 

1) Thick liquid, slurry, wet powder or granular wet materials; 

2) Heat sensitive and/or oxygen-sensitive wet materials;  

3) Moisture is solvents and needs to be recovered. 

Technical Features: 

• Compact design: The square vacuum chamber requires minimum installation and operation space. 
• Fast and uniform drying: The specially designed drying shelf can make sure heating medium evenly flow through each layer of shelf. 
• GMP sanitary design: The vacuum chamber and trays are made by SUS304 or SUS316L stainless steel and mirror polished without blind angle for cleaning to meet GMP sanitary standard.
• Low-temperature drying: Vacuum can considerably lower the boiling point of moisture or solvent, which makes low-temperature drying highly effective and energy-saving. 

Technical Parameters:

Note: Our FZG Vacuum Shelf Dryer is available in many sizes and configurations. The above models with typical design are indicative only. 

FAQ: 

Q: What information is needed in order to get a quote? 

A: Our Vacuum Shelf Dryer is customized according to specific raw material, drying capacity, heating medium etc . The following information is needed to work out a detailed quote:

1) Raw material name, bulk density and particle size etc. Samples might be needed for trial production or drying tests. 

2) Moisture content before drying; target moisture content in dried product; 

3) Load capacity in kg/batch;

4) Heating medium: Steam, hot water or hot thermal oil; 

5) Suggested drying temperature 

6) Power supply type: 220V/380V/415V/440V, 50/60Hz, three phase. 

Q: What is your normal lead time? 

A: All our machines are customized. The normal lead time is 40-50 days after receiving the advance payment.

Q: How the machine is packed?

A: The machine is packed in standard plywood box; 

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

A: 1)  All our machines are fully tested before shipping. Detailed operation manual, which includes photos, installation & operation videos, layout drawings, electric drawings etc. is delivered with the machine. So the end-user can easily install and operate the machine. 

2) In response to cutomer's invitation, technicians can be sent to the end-user's workshop for installation, commissioning and training. 

3) Provide life-long technical consultation and favorable spare parts.