Flask Filter
Product Code : LSK-LF-10418
Flask Filter (SKU LSK-LF-10418), also called a Buchner or suction flask, is a heavy-wall flask with a glass connector for vacuum filtration. Its thick walls withstand high vacuum, and it comes in five capacities from 100 ml to 5000 ml. It suits college chemistry, pharmacy and research practicals where solids must be separated quickly by suction. Science Lab Supplies sources this flask and dispatches it from Ambala, India for schools, colleges, training institutes, tender contractors and distributors.
Specifications
The table sets out each specification of the heavy-wall filter flask, one fact per row. In short, its thick wall stands up to high vacuum without collapsing, a glass connector near the neck takes the vacuum tubing, and the white enamel printing carries no graduation marks, because the flask collects filtrate rather than measuring it.
| Specification | Value |
|---|---|
| SKU | LSK-LF-10418 |
| Also known as | Buchner flask, suction flask |
| Wall | Heavy wall |
| Vacuum rating | Withstands high vacuum |
| Vacuum connection | Glass connector |
| Printing | White colour enamel |
| Graduation | None (ungraduated) |
| Capacities | 100 ml, 250 ml, 500 ml, 1000 ml, 5000 ml |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Filter Flask
Fitted with a Buchner funnel and a rubber adapter or bung, it forms a flask with filter set-up: the flask is connected to a vacuum source so suction pulls liquid quickly through the filter paper and leaves a dry solid behind. This makes it practical chemistry lab equipment in India for collecting crystals and precipitates.
- B.Sc. organic chemistry: collecting and washing crystals after preparation and recrystallisation, using a disc of Filter Paper in the funnel.
- B.Pharm. pharmaceutical chemistry practicals: isolating synthesised solids.
- Research and quality labs: rapid filtration of precipitates and suspensions, with suction from a mains pump or a Hand Vacuum Pump with Pressure Gauge.
Clamp the flask firmly on a Retort Stand with Boss Head and Clamp, place a trap between flask and vacuum line, and release the vacuum before switching off the pump. Check for chips or scratches before each use, as damaged glass is weaker under vacuum.
Standard Scope of Supply
The Flask Filter is supplied as a single flask with its glass connector, in whichever of the five capacities you order. Buchner funnels, rubber adapters and vacuum tubing can be added to the same quotation when you want a complete suction filtration set-up rather than the flask alone.
Packing, MOQ and Lead Time
You may ask for one flask, a full set of capacities, or enough for every student bench; the quotation spells out packing, delivery time and price for exactly that quantity. Matching funnels and other items from a laboratory glassware supplier in India can be priced alongside.
Science Lab Supplies holds an Importer-Exporter Code as a registered exporter and is able to ship to buyers in Zambia, Rwanda, South Africa, Qatar, Sri Lanka and Vietnam. To price a filtration bench, drop the sizes you need into the enquiry cart, write to us from the contact page, or open the lab tender page when the purchase runs through a formal tender.
Frequently Asked Questions
Why does a filter flask need a heavy wall?
Under vacuum, air pressure pushes inward on the whole flask. A heavy wall lets this flask withstand high vacuum, where an ordinary thin-walled flask could implode, so it is the safer vessel for suction filtration.
Is the flask graduated?
No. It is printed in white enamel without graduation, because it collects filtrate rather than measuring volume. Use a measuring cylinder or volumetric flask when the filtrate volume must be known accurately.
What sizes can I order?
The flask comes in 100 ml, 250 ml, 500 ml, 1000 ml and 5000 ml capacities. The smaller sizes suit student preparations, while the 1000 ml and 5000 ml flasks can handle larger filtration batches.
Who supplies the Flask Filter?
Science Lab Supplies sources this filter flask and quotes it from Ambala, India, either on its own or together with Buchner funnels, vacuum pumps and the rest of a filtration set-up.
Related Vacuum Filtration Equipment
A filter flask needs a funnel on top and a vacuum source at the side, so the items below, from the Laboratory funnel and Chemistry Lab ranges, complete a suction filtration set-up. Any of them can be quoted together with the flask on one document.
- Buchner Funnel with Sintered Disc — fire-polished rim and stem, porosity grades 0 to 5, 35 ml to 1000 ml.
- Buchner Funnel Fritted Disc — thick-wall funnel with beaded rim, in coarse, medium or fine porosity.
- Vacuum Filtration Funnel (Buhner Funnel) — porcelain funnel of 120 ml capacity.
- Conical Flask with Side Funnel (Erlenmeyer Bunsen) 250ml — 250 ml Erlenmeyer flask with a side arm for vacuum filtration.
- Equipment for Vacuum Filtration — set with porcelain Buchner funnels, a water pump, a three-mouth bottle, tubing and rubber stoppers.
- Vacuum Pump Filter — extruded brass water pump that creates vacuum as water passes through it.
- Vacuum Pressure Pump — general-purpose pump, about 50 litres per minute, ultimate vacuum 5 Pa.
Browse the full Laboratory Flasks range, the Laboratory funnel range for Buchner and filtering funnels, or all school lab equipment.
Last updated: 22 October 2026
