Fractionating Columns Pear Bulb
Product Code : EL-CC-10214
Lab Glassware Manufacturer manufactures and exports Fractionating Columns, Pear Bulb from its Ambala, Haryana facility, supplying school, college and research laboratories in India as well as export buyers that have recently included institutions in Mexico, Guatemala and Costa Rica — part of a wider base of enquiries from across Central America.
Quick answer: A pear-bulb fractionating column uses a pear-shaped bulb section along its length instead of indentations or a spiral insert, giving the vapour a wider surface to condense and re-evaporate against as it rises through the column. It terminates in a 34/35 socket and a 24/29 cone, and is offered in three effective lengths.
| Effective length | Socket size | Cone size |
|---|---|---|
| 130mm | 34/35 | 24/29 |
| 250mm | 34/35 | 24/29 |
| 500mm | 34/35 | 24/29 |
How the Pear Bulb Aids Fractionation
As rising vapour meets the wider internal surface of the bulb, part of it condenses and runs back down, giving an additional stage of vapour-liquid contact before the remaining vapour continues up the column. This works alongside the socket-and-cone joints at 34/35 and 24/29, which connect the column to a still head above and a flask or adapter below. The 130mm, 250mm and 500mm lengths trade off separation performance against bench height and apparatus size.
Frequently Asked Questions
What does the pear-shaped bulb do?
The wider bulb section gives rising vapour more surface to condense against, adding an extra stage of vapour-liquid contact that supports better separation than a plain straight column of the same length.
Which effective length is right for my application?
Longer columns generally support better separation for mixtures with close boiling points; the 500mm option suits more demanding fractionation, while 130mm and 250mm suit routine or space-limited setups.
What size fittings does this column use?
It has a 34/35 socket at one end and a 24/29 cone at the other; confirm these match your still head, flask or adapter before ordering.
Related Products
See the full range on the Chromatography Columns page, including the Vigrex and Dufton fractionating columns.
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Ready to order Fractionating Columns, Pear Bulb for your laboratory or export order? Contact Us for a quotation, or visit the Tenders page for bulk and institutional procurement.
Last updated: September 2026.
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