DURAN® Filtering Flask
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DURAN® Filtering Flask
Filtering flasks are used for drawing off liquids and vacuum filtration.
DURAN filtering flasks
- available in both conical and bottle form.
- appropriate pressure tested to ensure that items are suitable for use under vacuum.
- 3 types hose connection: KECK Assembly set, glass hose connection and side-arm socket
- DURAN filtering flasks with KECK Assembly set provide protection and safety for laboratory workers and the laboratory. Their design makes it easier to fit and remove the vacuum tubing. There is also less risks of breakage in the dishwashing machine so that they have a longer service life.
Applications
A filter funnel with sintered dish is fitted in the flask neck with a Guko conical rubber gasket.The negative pressure produced by the vacuum connection sucks the liquid through the filter.The liquid is collected in the filtering flask. The stem of the filter funnel must extend beyond the opening of the suction connection to prevent any liquid droplets being sucked out.
The appropriate vacuum tubing is inserted in the side-arm of the flask until it is firmly located in the conical section of the side-arm. When the tubing is connected to a water jet pump the end of the tubing is sucked in even more firmly and the side-arm is closed off.
Safety
DURAN filtering flasks with plastic hose connections comply with the requirements of the German equipment safely regulations. They have been awarded the TUV-Rheinlands’s GS mark. Glass hose connections are no longer approved for use in some countries because of high risk of injury.
DURAN filtering flask with Keck Assembly set connection
DURAN fitlering flask side-arm socket
DURAN filtering flask with glass hose connection
DURAN® Filtering Flask with KECK™ Assembly Set
Heavy walled for vacuum use. These filtering flasks fulfil the regulations of the ”equipment and product safety regulations“. The plastic hose connection is replaceable.
Typical application: Separations by vacuum filtration.
| Cat. No. | Capacity (ml) |
d(OD) (mm) |
d1(OD) (mm) |
h (mm) |
Hose connection d(OD)(mm) |
Pack Unit |
| Erlenmeyer shape (Conical flask shape) | ||||||
| 212042452 | 100 | 64 | 24 | 105 | 9 | 10 |
| 212043654 | 250 | 85 | 34 | 155 | 9 | 10 |
| 212044453 | 500 | 105 | 34 | 185 | 9 | 10 |
| 212045458 | 1000 | 135 | 45 | 230 | 9 | 10 |
| 212046351 | 2000 | 166 | 60 | 255 | 9 | 1 |
| Bottle shape | ||||||
| 211946854 | 3000 | 170 | 58 | 295 | 9 | 1 |
| 211947353 | 5000 | 185 | 68 | 360 | 9 | 1 |
| 211948658 | 10000 | 240 | 70 | 420 | 9 | 1 |
| 211948855 | 15000 | 257 | 70 | 500 | 9 | 1 |
| 211949157 | 20000 | 290 | 70 | 535 | 9 | 1 |
DURAN® Filtering Flask with Side-Arm Socket
Erlenmeyer shape (Conical flask shape)
Heavy walled for vacuum use. These filtering flasks fulfil the regulations of the ”equipment and product safety regulations“.
Typical applications: separations by vacuum filtration.
| Cat. No. | Capacity (ml) |
d(OD) (mm) |
d1(OD) (mm) |
h (mm) |
Pack Unit |
| 211833603 | 250 | 85 | 34 | 155 | 10 |
| 211834402 | 500 | 105 | 34 | 185 | 10 |
| 211835407 | 1000 | 135 | 45 | 230 | 10 |
| 211836309 | 2000 | 166 | 60 | 255 | 1 |
Bottle shape
Heavy walled for vacuum use. These filtering flasks fulfil the regulations of the ”equipment and product safety regulations“. Provision of filtration flasks with a socket has not only made work in preparation and analytical laboratories easier and simpler, but has also reduced the risk of accidents. Note: These filtering flasks have a ground socket 17.5/26 for vacuum tube of 15 to 18 mm OD (e.g. 6 x 5 mm or 8 x 5 mm, DIN 12 865).
Typical application: separations by vacuum filtration.
| Cat. No. | Capacity (ml) |
d(OD) (mm) |
d1(OD) (mm) |
h (mm) |
Pack Unit |
| 211936804 | 3000 | 170 | 58 | 295 | 1 |
| 211937303 | 5000 | 185 | 68 | 360 | 1 |
| 211938608 | 10000 | 240 | 70 | 420 | 1 |
| 211938805 | 15000 | 255 | 70 | 500 | 1 |
| 211939107 | 20000 | 290 | 70 | 535 | 1 |
Due to the heavy wall thickness the apparatus is vacuum-tight. For suitable rubber seals, please refer to Filtering Flask Accessories
Typical applications: Separations by vacuum filtration.
| Cat. No. | Capacity (ml) |
d(OD) (mm) |
d1(OD) (mm) |
h (mm) |
Hose connection d(OD)(mm) |
Pack Unit |
| Erlenmeyer shape (Conical flask shape) | ||||||
| 212012409 | 100 | 64 | 24 | 105 | 11 | 10 |
| 212013602 | 250 | 85 | 34 | 155 | 11 | 10 |
| 212014401 | 500 | 105 | 34 | 185 | 11 | 10 |
| 212015406 | 1000 | 135 | 45 | 230 | 11 | 10 |
| 212016308 | 2000 | 166 | 60 | 255 | 11 | 1 |
| Bottle shape | ||||||
| 211916802 | 3000 | 170 | 58 | 295 | 11 | 1 |
| 211917301 | 5000 | 185 | 68 | 360 | 11 | 1 |
| 211918606 | 10000 | 240 | 70 | 420 | 11 | 1 |
| 211918803 | 15000 | 255 | 70 | 500 | 11 | 1 |
| 211919105 | 20000 | 290 | 70 | 535 | 11 | 1 |
Erlenmeyer shape (Conical flask shape)
Bottle shape
KECK™ Assembly Set
With removable plastic hose connection (PBT), short and long screw (PP), seals (VMQ, EPDM). Suitable for filtering flasks 100 – 20 000 mL.
| Cat. No. | Hose connection d (OD) (mm) | Pack Unit |
| 292585407 | 9 | 10 |
Rubber Conical Gasket Set Guko from EPDM
conical rubber gaskets, for filtering flasks
| Cat. No. | Description | Pack Unit |
| 292020001 | 8 Guko gaskets, size 22 to 84 | 1 |
Rubber Conical Gaskets Guko from EPDM, for filtering flasks
| Cat.No. | d1(OD) (mm) |
d2(OD) (mm) |
h (mm) |
s (mm) |
Pack Unit |
| 292021203 | 22 | 12 | 18 | 2.5 | 10 |
| 292021709 | 29 | 16 | 23 | 3.5 | 10 |
| 292022302 | 36 | 22 | 25 | 3.5 | 10 |
| 292022705 | 44 | 27 | 30 | 4 | 10 |
| 292023204 | 53 | 33 | 35 | 4.5 | 10 |
| 292023607 | 63 | 43 | 35 | 5 | 10 |
| 292023907 | 73 | 52 | 37 | 5 | 10 |
| 292024303 | 84 | 61 | 40 | 5.5 | 10 |