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Filtering Flasks

Filtering Flasks

Filtering flasks are used in numerous general laboratory procedures for rapid filtration of liquids. Typical flask design includes a conical shape with a flat bottom, tapered neck, and a sidearm for use in vacuum filtration. Filtering flasks are most commonly manufactured from borosilicate glass with thick walls that can withstand pressure under vacuum. Depending on the application, the flasks can be manufactured from other materials, such as polystyrene. Filtering flasks are available in a variety of volumes and socket sizes. Graduated and ungraduated varieties are available. Filtering flasks are also known as vacuum flasks, Buchner flasks, suction flasks, Kitasato flasks, or side-arm flasks. The flasks are often used with other accessories, such as a Buchner funnel that is fitted through a rubber bung or a Buchner ring. The sidearm can be integral to the flask or detachable, with barb-like rings on the tip to allow for connection to vacuum tubing.
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1 – 15 of 35 results
1

Conical Filter Vacuum Flask with Hose Tubulature

Use this Conical Filter Vacuum Flask with Hose Tubulature with a vacuum funnel and filter. This thick-walled Ehlenmeyer flask features a glass tube protrusion about an inch from its neck and is also known as a Büchner flask.

Diameter (Metric) Outer Tubing 8 mm
Material Borosilicate Glass
2

Pyrex™ Borosilicate Glass Vacuum Filter Flask with Side Arm

Manufactured from Borosilicate Glass and complies with ISO 6556. Pyrex™ Borosilicate Glass Vacuum Filter Flask with Side Arm features heavy walls to provide increased mechanical strength while 'studded' base minimises surface abrasion. These Büchner type flasks include an integral glass side-arm to accept 9mm bore flexible tubing necessary for vacuum filtration.

Description Style: Erlenmeyer
Material Borosilicate Glass
Certifications/Compliance ISO 6556
3

DWK Life Sciences DURAN™ Filtering Flask, with glass hose connection, Erlenmeyer shape

The filtering flask is a thick-walled vessel which is used as a collecting vessel for the filtrate during filtration.

Closure Size 11 mm fitting
Material Borosilicate Glass (3.3)
Autoclavable Autoclavable
For Use With (Application) Separations by vacuum filtration; Filtration at reduced pressure; Filtrieren; Vacuum filtration; Safe working under vacuum
4

DWK Life Sciences DURAN™ Filtering Flask, with KECK™ Assembly Set, Erlenmeyer shape

The filtering flask is a thick-walled vessel which is used as a collecting vessel for the filtrate during filtration.

Closure Size 9 mm fitting
Material Borosilicate Glass (3.3),PBT,Polypropylene,VMQ,EPDM
Autoclavable Autoclavable
For Use With (Application) Separations by vacuum filtration; Filtration at reduced pressure; Filtrieren; Vacuum filtration; Safe working under vacuum
5

DWK Life Sciences Kimble™ Kontes™ ULTRA-WARE™ Heavy-Wall Filter Flasks

Heavy-wall borosilicate glass provides mechanical strength for vacuum filtration

Material Borosilicate Glass
6

Quickfit™ Borosilicate Glass Vacuum Filter Flask with Screw Thread Connector And Ground Socket

Complies with ISO 6556. Quickfit Jointed Ware™ Quickfit™ Borosilicate Glass Vacuum Filter Flask with Screw Thread Connector And Ground Socket's heavy walls and bases are designed for vacuum filtration work.

Includes PTFE screw thread connector
Material Borosilicate Glass
Certifications/Compliance ISO 6556
7

DWK Life Sciences DURAN™ Filtering Flask, with KECK™ Assembly Set, bottle shape

The filtering flask is a thick-walled vessel which is used as a collecting vessel for the filtrate during filtration.

Closure Size 9 mm fitting
Material Borosilicate Glass (3.3),PBT,Polypropylene,VMQ,EPDM
No. per Pack 1/Pk.
Autoclavable Autoclavable
For Use With (Application) Separations by vacuum filtration; Filtration at reduced pressure; Filtrieren; Vacuum filtration; Safe working under vacuum
8

Thermo Scientific™ Nalgene™ Polypropylene Vacuum Flask
GREENER_CHOICE

Replace glass flasks with this flask, molded in one piece for full vacuum service with angled tubulation to prevent tipping.

No. per Case 1
Material Polypropylene
No. per Pack 1
Autoclavable Autoclavable
9

DWK Life Sciences Kimble™ Kontes™ Heavy Wall Filtering Flask

Provides mechanical strength under vacuum application

Diameter (Metric) Inner Tubing 0.93 cm
Material Borosilicate Glass
11

Pyrex™ Büchner Flask with Screw Thread Connector

Manufactured from borosilicate glass. Pyrex™ Büchner Flask with Screw Thread Connector features heavy wall construction for vacuum filtration applications, and tooled neck to accept a drilled rubber stopper. Sidearm includes a PTFE screwthread connector for easy and safe fitting of 9mm bore vacuum tubing. Complies with ISO 6556.

Includes PTFE screw thread connector
Material Borosilicate Glass
Certifications/Compliance ISO 6556, DIN 12476
12

BRAND™ 250 mL Filter Flask

Filter Flask equipped with a lateral socket.

13

DWK Life Sciences DURAN™ Filtering Flask, with glass hose connection, bottle shape

The filtering flask is a thick-walled vessel which is used as a collecting vessel for the filtrate during filtration.

Closure Size 11 mm fitting
Material Borosilicate Glass (3.3)
No. per Pack 1/Pk.
Autoclavable Autoclavable
For Use With (Application) Separations by vacuum filtration; Filtration at reduced pressure; Filtrieren; Vacuum filtration; Safe working under vacuum
14

Quickfit™ Borosilicate Glass Büchner Vacuum Filtration Funnels with Glass Sintered Disc

Useful where conventional filter papers would be destroyed by acids and alkalis