Buchner funnels

Buchner funnels -Material:ceramic or porcelain -Used for Vacuum filtration -No chips or cracks

Buchner funnels 

   A Buchner funnel is a porcelain funnel with a flat, perforated bottom. This funnel is used only for vacuum filtration. A holed rubber stopper or adapter is needed to hold the funnel in place inside the neck of a suitably-sized filter flask. When the side-arm of the filter flask is attached to the aspirator (or to a vacuum trap attached to the aspirator), any liquid poured into the top of the Buchner funnel is quickly sucked into the flask, ideally leaving any particulate matter or precipitate on the filter paper inside the funnel. Any precipitate can then be effectively air-dried simply by leaving the vacuum connected, drawing air through the precipitate. Sizes may vary.

 

Specification of Funnels with perforated Filter Disc,Glazed

OD (mm)	Dia.of tube (mm)	Total height (mm)	Bowl height (mm)	Perforations dia.(mm)	No of Perforations
20	10	45	15	2	19
40	14	65	22	2	37
50	16	80	25	2	37
60	18	100	30	2	51
80	22	130	40	2	51
100	24	150	45	2	88
120	30	170	60	2	123
130	32	190	65	2	123
150	36	220	70	2	164
180	40	250	80	2.5	212
200	45	270	90	2.5	212
250	50	310	110	2.5	326
300	60	380	140	2.5	463

Buchner funnels