Borosilicate glass filtering flasks are heavy-duty flasks with side tubulation and graduations. The thick walls of Corning’s filter flask provide the mechanical strength needed for vacuum work. The flasks come in three sizes.
Heavy-duty flask with side tubulation. Graduated to indicate approximate volume. The thick walls of Corning’s filter flask provide the mechanical strength needed for vacuum work. Consequently, filter flasks should never be heated. All sizes fit 5/16" to ¼" i.d. tubing.
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How to Set Up a Vacuum Filtration