Funnels

DURAN® Filter Funnel, Büchner, with Sintered Disc 25852

duran-group

DURAN 2585225

FUNNEL SEPARATORY, CYLINDRICAL DROPPING, WITH GLASS STOPPER SJ, WITHOUT GRADUATION FUNNEL SEPARATORY, CYLINDRICAL DROPPING, WITH GLASS STOPPER SJ, WITHOUT GRADUATION 2399

kavalier

SIMAX 2399

Buechner funnel DURAN® 213412

duran-group

One of the most important separation methods in the laboratory environment is filtration, which is used to separate or clean different media. For this working method, filters are required which are selected according to the application with regard to size and porosity. Büchner funnels are cylindrical with an integral large-pored glass sieve support plate. Without additional filter paper, only coarse filtration is possible. Büchner funnels can also be used in vacuum filtration. The applied vacuum accelerates the filtration.
Manufactured from 3.3 expansion borosilicate glass

Büchner funnels of PP 194ххх

deltalab

Material: polypropylene.
Unbreakable and resistant to corrosion and heat.
Easily dismantled for cleaning. Autoclavable.

Dropping funnels, cylindrical, graduated - DURAN® 24124

duran-group

These dropping cylinders are ideal for the measured addition of solutions, reagents and/or chemicals to a reaction mixture. The double graduated scale shows the approximate volume of liquid contained in the funnel or the volume dispensed from the funnel. Pressure-equalising dropping funnels have an additional narrow-bore glass tube from the bulb of the funnel, to the ground glass joint around the stem. These replace the liquid volume lost in the bulb with the equivalent gas volume from the flask into which the reagent is flowing, and are useful when handling air-sensitive reagents in a sealed, inert-gas environment. Without this tube, or some other means to equalize the pressure between a sealed receiving flask and the bulb of the funnel, the flow of fluid from the bulb will stop.