LTE's smallest bench top freeze dryer still has an ice capacity of 3kg and represents excellent value. Taking up minimal bench space, the Mini Lyotrap is ideal for all common freeze drying applications and can be used as a cold trap for single or multiple units.
This simple to use, microprocessor controlled bench top model is packed with useful features. The Lyotrap incorporates an electric defrost facility, displays temperature and vacuum parameters digitally and incorporates a safety system which prevents the vacuum pump being activated until the temperature has reached -30°C.
LTE's largest freeze dryer has an 18kg ice capacity. With the same controls and features as the Lyotrap, the Lyotrap Ultra is ideal for high product volumes and long running times before defrost. It is well suited for multi-user laboratories and pilot scale applications. Includes an integral vacuum pump and is floor standing.
Freeze drying using:
The sample in the flask would be pre-frozen before being freeze dried. A popular method of freezing liquid sample is to rotate the flask in a pre freezing bath. This has the benefit of providing a thin film of frozen material around the inside of the flask which improves the efficiency and overall speed of the freeze drying process. Flasks are usually placed onto a suitable manifold for freeze-drying, many of which are available. Column manifolds are ideal if you are freeze drying flasks and jars only. Drum manifolds or the acrylic chamber fitted with a manifold lid will allow more flexibility in the type of product to be freeze dried.
Trays or shelves
Again, product would be pre-frozen before freeze drying. Using our standard shelf arrangement, samples would be placed onto the shelves directly. For drying using the tray and support option, samples would be pre-frozen in the trays provided and slotted onto the rack. Up to six trays could be freeze dried at any one time. Temperature controlled heater mats can be supplied for this application.
Freeze drying in vials requires the use of our manual stoppering shelf arrangement, connected to the required base unit. This stoppering system will allow upto 500 vials to be dried at once, with a maximum vial height of 50mm. Supplied with suitable trays and an acrylic vacuum chamber. Optional temperature controlled heater mats will allow improved drying rates.
Ampoules need to be frozen before being fitted to the manifold and can be frozen in two ways. They can be placed into a conventional freezer. Whilst this is a common method, freezing in this way can prolong the freeze drying process due to the concentration of the sample. A much better way is to use a spin freezer. Following pre-freezing, the ampoules would be freeze dried using either a single or double manifold arrangement, each manifold capable of holding 48 ampoules. Following freeze drying it is then normal to seal the ampoules using a fine flame technique.
Advances in technology have made freeze drying a very popular laboratory function. Find online auctions and classified ads for freeze dryers on LabX today!
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