PTFE Key Stopcock Burette
Product Code : EL-GS-10265
Lab Glassware Manufacturer, based in Ambala, Haryana, India, manufactures and exports the PTFE Key Stopcock Burette, a chemical-resistant flow-control fitting used in place of a traditional ground-glass key on laboratory burettes. Manufactured since 1982, this PTFE-key stopcock is supplied to research institutions, school and college laboratories, and distributors across Gabon, Congo, Equatorial Guinea, and the wider Congo Basin region.
Quick answer: A PTFE key stopcock replaces the ground-glass key of a conventional glass stopcock with a solid PTFE (polytetrafluoroethylene) plug, so the burette can be operated dry, without lubricating grease, while resisting attack from acids, alkalis, and most laboratory solvents.
| Size (mm) | Bore Size (mm) | Key Material |
|---|---|---|
| 12.5 | 2.5 | PTFE |
Manufacturer-stated dimension — confirm before ordering.
PTFE Key vs. Glass Key: Choosing the Right Stopcock
Laboratories that titrate aggressive reagents such as strong acids, alkalis, or oxidizing solutions often prefer a PTFE key stopcock over a conventional glass straight stopcock, since the PTFE key does not require lubricating grease and will not seize or bind after repeated exposure to corrosive chemicals. A ground-glass key stopcock remains a cost-effective choice for routine aqueous titrations, while the PTFE version is generally specified where chemical resistance and grease-free operation are priorities. Bore size should be selected to match flow-rate requirements for the specific titration or dispensing procedure.
Frequently Asked Questions
Is a PTFE key stopcock suitable for organic solvents?
PTFE resists most common laboratory organic solvents; buyers with an unusual reagent list should confirm chemical compatibility with our team before ordering.
Does the PTFE key need lubrication?
No. Unlike a ground-glass key, a PTFE key stopcock is designed to operate dry, without silicone or hydrocarbon grease.
What bore size should I choose?
The listed 2.5mm bore suits standard titration flow rates; contact us if your application needs a faster or slower controlled flow.
Do you export this stopcock to Central Africa?
Yes, Lab Glassware Manufacturer regularly exports laboratory glassware and fittings to Gabon, Congo, and Equatorial Guinea, and can quote FOB or CIF terms on request.
Related Products
- Glass Key Stopcock For Burette
- Glass Straight Stopcock
- Straight PTFE Key Stopcock
- Glass Stopcocks
- Laboratory Glass Stopcocks
Request a Quote
For indicative FOB/CIF export pricing on the PTFE Key Stopcock Burette, or to request a formal quotation, please contact us or view current tenders.
Last updated: September 2026