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Filter Flask, Conical, 250 mL, Borosilicate glass. Borosil brand, ungraduated. New.
A water aspirator or vacuum pump (sold sep.) attached to the side tube provides suction for speeding up filtration processes. Takes Rubber Filter Aid to accomodate a Büchner funnel (see below; each sold separately).
Ship. wt. 1 lb
#C802.....$12.95 each
Filtering Flask, Conical, 500 mL, Borosilicate glass. Bomex or Borosil brand (may be ungraduated). New.
Tubulation diameter: the smallest ridge has an O.D. of about 3/8"; the middle ridge has an O.D. of about 7/16"; largest ridge has O.D. approx. 1/2".
Recommended vacuum tubing size: 3/8" to 7/16" I.D.
Ship. wt. 1.5 lbs.
#C805....$15.95 each
Filtering Flask, Conical, 1000 mL, Borosilicate glass. Bomex or Borosil brand (may be ungraduated). New.
Ship. wt. 2.5 lbs
#C810....$22.95 each
Büchner Funnel, 70 mm (nominal
I.D.). Outside diameter approx. 80mm.
Capacity about 120 mL.
Takes 7 cm Filter Paper, #FP1027 (see below).
Bowl height approx. 50 mm, overall height approx. 140 mm.
New.
Ship wt 3/4 lb.
#C653 ... $5.99 ea.
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Büchner Funnel, 90 mm (nominal I.D.). Outside dia. approx. 100 mm.
Capacity about 200 mL.
Takes 9 cm Filter Paper, #FP1029 (see below).
Bowl height about 55 mm, overall height about 160 mm. New.
#C654...$8.29 ea.
Filter Paper, Qualitative, Medium porosity, 7 cm. Suitable for some types of paper chromatography as well.
Fits #C653 Buchner Funnel. 100 circles per pack.#FP1027 ... $2.84 / pack
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Filter Paper, Qualitative, Medium porosity, 9 cm. Fits #C654 Buchner
Funnel. 100 circles per pack.#FP1029 ... $3.84 / pack
More types of filter paper available on their own page
Drilled Stopper - This works better than the Rubber Filter Aid, but for a while we had stopped offering it because it was so time-consuming to make (tapered hole, hand-filing, etc). All the different flask neck sizes made it tricky, as well.
We're going to give this a try again.
Choose your flask and Buchner funnel size in the "Options" drop-down menu. If you want the stopper made for a flask / funnel combo you're ordering, please specify there. That's the easiest way for us to make sure it fits what you have. Otherwise, no guarantees. We currently offer these only for the 80 and 100mm Buchner funnels.
Custom-drilled stopper is non-returnable, so please make sure you furnish the correct measurements. If you have a flask size we definitely cannot accommodate, we will let you know.
#SD7 Drilled Stopper (Specify size)........$12.00 each
Rubber Filter Aid - fits the
Buchner funnel to the flask neck to provide enough of a seal for
vacuum filtration. One filter aid can be used with different sizes of
flasks and Buchner funnels. New.
$6.29 each
Vacuum Pumps for filtration are on their own page
Texas residents please read this.
through Google Checkout
We also accept Paypal
Glassware
Rubber Filter Aid
Stoppers
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Terms of Sale / Use
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Related items:
Safety Article -
Using Filtration Flasks
Additional types of filter paper are available on their own page
