Chromatography Columns, with PTFE Needle Valve Stopcock
Product Code : EL-CC-10048
Lab Glassware Manufacturer manufactures and exports the Chromatography Columns, with PTFE Needle Valve Stopcock from its Ambala, Haryana facility, supplying school, college and research laboratories in India as well as export buyers that have recently included institutions in Australia, New Zealand and Fiji — part of a wider base of enquiries from across Oceania.
Quick answer: This borosilicate glass chromatography column has a ground-glass socket that accepts a reservoir, a PTFE Rotaflo-type needle-valve stopcock for fine control of eluent flow, and a chemically resistant sintered glass disc of porosity 0. The needle-valve design gives finer, more repeatable flow adjustment than a simple key stopcock.
| Specification | Detail |
|---|---|
| Material | Borosilicate glass |
| Upper fitting | Ground-glass socket, accepts a reservoir |
| Stopcock | PTFE Rotaflo-type needle valve |
| Disc | Chemically resistant sintered glass, porosity 0 |
Why a Needle Valve Stopcock
A PTFE needle-valve (Rotaflo-type) stopcock allows finer, more repeatable adjustment of eluent flow than a plain key stopcock, which matters for slow-endpoint or drop-sensitive separations. The ground-glass socket at the top accepts a reservoir for larger sample or solvent volumes, and the porosity-0 disc retains packing material at the base. See the full range on the Chromatography Columns page.
Frequently Asked Questions
What is a PTFE Rotaflo-type stopcock?
It is a needle-valve stopcock design made with a PTFE key, giving finer and more repeatable control of liquid flow than a plain glass or PTFE key stopcock.
What does the ground-glass socket accept?
The upper ground-glass socket accepts a reservoir, allowing larger sample or solvent volumes to be used with the column.
What material is this column made from?
It is manufactured from borosilicate glass for chemical and thermal resistance.
Related Products
See the full range of chromatography and fractionating columns on the Chromatography Columns subcategory page.
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Last updated: September 2026.