Desiccator, Polypropylene lower section with polycarbonate cover.
A neoprene 'O' ring sits in a groove in the base unit to provide an excellent seal with the cover. Use a small amount of grease on the O-ring to help establish a secure vacuum.
The desiccators will hold a vacuum of 740mm of mercury (29") for 24 hours (loss not exceeding 20mm/Hg). A removable pan holds calcium chloride or other drying agent.Vacuum release tap/non return valve assembly is included; specially grooved stopper in this assembly allows air, when required, to be re-admitted very slowly to avoid disturbing the contents. Usage Instructions: