Buchner Bungs (Black) Manufacturer,Supplier and Exporter in India

Buchner Bungs (Black) (Product Code: SLE/CH/190) are black, 32 x 24 mm bungs that seat a Buchner funnel in the neck of a filter flask and form the seal needed for suction filtration. They save the job of boring a large hole through a rubber stopper to take the funnel stem, and they give a consistent fit each time the apparatus is assembled. Chemistry teachers and technicians use them in practicals where crystals or precipitates are filtered under reduced pressure. They come in packs of 10 and are supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala.

Specifications

Typical Use

To set up suction filtration, clamp the filter flask, fit a bung into its neck, and push the stem of the Buchner funnel through the bung until it sits firmly. With a filter paper laid flat and wetted in the funnel and the side arm connected to a filter pump, the bung holds the vacuum so liquid is drawn quickly through the paper and the solid is left as a dry cake. Students preparing salts, recrystallising aspirin or collecting a precipitate all rely on that seal, so a leaking joint is usually the first thing to check if filtration is slow. A pack of ten lets each practical group keep its own, and spares are a handy part of the chemistry consumables a prep room keeps on the shelf.

Choose a bung that sits partly inside the flask neck rather than being forced right in. Rinse after use to remove solvent and residue, dry at room temperature, and store away from heat and sunlight.

Supplier

Buchner Bungs are supplied by Jain Scientific Equipments Private Limited, which does business as ScienceLab from Ambala, Haryana, providing educational and research labs with glassware, apparatus and the small fittings that go with them. The company profile gives an overview.

Related Chemistry Lab Equipment

The other parts of a suction filtration set-up:

• Buchner Funnel, 90 mm, Porcelain — the classic porcelain funnel the bung holds.
• Buchner Funnel, 90 mm, Polypropylene — a lighter plastic alternative.
• Conical Filter Flask — the side-arm flask the bung seals into.
• Filter Paper — laid in the funnel to retain the solid.
• Filter Pump, Borosilicate Glass — provides the suction through the flask side arm.

Browse the Chemistry Lab Equipment category for more filtration items.

Frequently Asked Questions

What size are the Buchner Bungs?
They measure 32 x 24 mm.

How many are in a pack?
They are supplied in packs of 10.

Will they fit my filter flask and funnel?
Compare the 32 x 24 mm size with the inside of your flask neck and the stem of your Buchner funnel. If you are unsure, send us the flask and funnel details through the contact page and we will advise.

Why use these instead of a bored rubber bung?
Boring a large, clean hole through a rubber bung is slow and often uneven. These bungs are made for the purpose, so the funnel seats and seals without any cutting.

How should they be cleaned?
Rinse them with water after each use, remove any solvent residue, and let them dry naturally before storing.

Can you supply them with a full filtration set for a school?
Yes. Add funnels, flasks, filter paper and pumps to your enquiry and we will quote everything together for delivery in India or abroad.

Request a Quote

Request a price for Buchner Bungs (Black) using the contact page, or add them to the enquiry cart alongside the rest of your filtration apparatus.

Last updated: 24 September 2026