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Conical Filter Flask
Conical Filter Flask (Product Code: SLE/GFL/06) is a graduated borosilicate glass flask used as the collecting vessel in vacuum (suction) filtration, where a Buchner funnel sits in its neck and suction draws liquid quickly through the filter paper. Heat resistant and chemical resistant, it is offered in 100 ml, 250 ml, 500 ml, 1000 ml and 5000 ml sizes, from small student preparations to large batch filtrations. It is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, a laboratory glassware supplier in India and international markets.
Specifications
| Parameter | Detail |
|---|---|
| Type | Conical filter flask |
| Material | Borosilicate glass |
| Capacities | 100 ml, 250 ml, 500 ml, 1000 ml, 5000 ml |
| Graduation | Graduated |
| Resistance | Heat resistant; chemical resistant |
| Application | Chemical laboratory filtration |
Typical Use
For suction filtration, fit a Buchner funnel into the flask neck with a rubber bung or cone, place a filter paper in the funnel and wet it, then connect the flask's side outlet to a water-jet filter pump or vacuum pump with thick-walled tubing. When suction is applied, the filtrate is pulled into the flask and the solid is left as a compact cake on the paper — the standard way to collect crystals after recrystallisation and a routine piece of chemistry lab equipment for schools in India and colleges alike. The graduations show roughly how much filtrate has been collected.
Clamp the flask so it cannot tip over, and inspect it for scratches or chips before each use under vacuum. Release the vacuum before switching off a water-jet pump to stop water sucking back, and never heat the flask while it is under reduced pressure.
Manufacturer
The filter flask is produced by Jain Scientific Equipments Private Limited, which uses the trading name ScienceLab and operates from Ambala in Haryana, India. The company makes glassware and apparatus for teaching and analytical laboratories and supplies institutions and dealers. Details are on our company profile.
Related Laboratory Equipment
Everything needed to complete a vacuum filtration set-up:
- Buchner Funnel, 90 mm, Porcelain — the funnel that sits in the flask neck
- Buchner Bungs (Black) — seal the funnel into the flask
- Filter Pump, Borosilicate Glass — a water-jet pump to create suction
- Vacuum Tubing — connects the flask to the pump
- Filter Paper — the filter medium placed in the funnel
Compare other flask types in Glassware Flasks.
Frequently Asked Questions
Which sizes can be ordered?
100 ml, 250 ml, 500 ml, 1000 ml and 5000 ml.
Is a Buchner funnel or bung included?
No, the flask is listed on its own. Buchner funnels, bungs, tubing and filter paper are available separately from the list above.
What size Buchner funnel should I use?
It depends on the flask capacity and the neck opening. Please contact us with the flask size and we will suggest a matching funnel and bung.
What vacuum source works with it?
A water-jet filter pump is common in teaching labs; an electric or hand vacuum pump can also be used with suitable tubing.
How should I use it safely under vacuum?
Check for glass damage before use, clamp the flask firmly, keep the set-up at room temperature, and release suction gradually at the end.
Do you take bulk and overseas orders?
Yes, we supply institutions and distributors in India and international markets.
Request a Quote
Send us the sizes and quantities via the contact page, or add the flask and its accessories to the enquiry cart for one quotation.
Last updated: 24 September 2026
