A filtering flask is known by many different names: vacuum flask, suction flask, Buchner flask, etc. But no matter what you call it, Macalaster Bicknell Company of New Jersey has what you’re looking for.

Filtering Flasks

An essential piece of laboratory glassware, a filtering flask has thick walls and a short glass tube. A hose barb protrudes an inch below the mouth. A flexible hose or tubing connects to the barb, and can form a connection back to the flask. Alternatively, the tubing could be connected to a vacuum pump.

The thick walls of a filtering flask are most often made from borosilicate glass. The walls need to withstand the pressure caused by a vacuum. Borosilicate glass is renowned for being heat proof, as well as its resistance to stress fractures caused by pressure. A Buchner funnel is fitted to the neck of the filtering flask to filter samples. The funnel uses a layer of paper to isolate the sample from suction caused by the vacuum. During the filtering process, the solution is pulled through the funnel, and residue remains on the filter paper.

Mac Bic offers a variety of filtering flasks. All of the glassware is Pyrex brand and features the tried and tested Corning formula. Flasks are available in 250mL, 500mL, 1000mL, 2000mL and 4000mL sizes. All filtering flasks sold through Mac Bic are blanks, meaning that they do not feature graduated volumetric measurements.

Exceptional Customer Service

All orders are expertly hand packed by our experienced personnel. Each package is checked twice prior to delivery to ensure your glassware arrives in one piece. If for some reason damage occurs during transit, we will work with you to file a personal claim.

Macalaster Bicknell Company of New Jersey has been a leading provider of glass tubing, rods and supplies since 1950. And with our high-quality products coupled with our low-price guarantee, it’s not hard to see why. Contact us today for all your filtering flask needs.