What’s freeze drying recipes?
By preset a freeze drying recipe (or freeze drying steps) into the controller, freeze dryer lyophilizer will fully automatic working, no worker is needed to ......
What’s conductive heating and radiative heating in freeze drying?
Definition Conductive and radiative means the energy/heat transfer method, mainly there are 3 methods: heat conduction, heat radiation and heat convection. Heat conduction is ......
Drying chamber, rectangular or cylindrical?
In a freeze dryer, the drying chamber have 2 shape: rectangular and cylindrical. Here are the main differences between:Rectangular drying chamber have a higher space ......
Shelves and trays material influence lyophilization cycle time a lot
Mainly, shelves and trays are fabricated from Aluminum alloy or stainless steel material. Due to the heat conductivity of different material, the liofilization drying time ......
Condenser temperature, the colder the better?
Not always.Condenser temperature 10C to 15C colder than sample freezing point is ok. A colder condenser will not speed up the lyophilization, but it will ......
Is it normal that huge temperature difference between shelves and raw product?
Yes, its normal.The shelves temperature displayed is the inlet temperature of the heat transfer fluid (it may change as per the recipe programmed). The material ......
