LFD-18-5 lyophilizer has 24pcs of standard rubber sealing valves and 24 ampules can be mounted. Special requirements can be customized. It is suitable for the preservation of bacteria, fungi and other microbial strains in the ampoule tube. The ampule sealing method is often used in the laboratory. The samples are sealed in small ampoules after freeze drying. It has the advantages of long preservation period, small variation, ease of large-scale preservation and wide applications.