Burette Class-B with PTFE Key Stopcock
Product Code : EL-GB-10104
Lab Glassware Manufacturer manufactures and exports the Burette Class-B with PTFE Key Stopcock from its production base in Ambala, Haryana, in continuous operation since 1982, supplying school and college science laboratories, university research departments, and export buyers that have recently included institutions in Nepal, Bangladesh and Sri Lanka — part of a wider base of enquiries from across South Asia.
Quick answer: This is a straight glass burette fitted with a PTFE key stopcock and finished to Class B tolerance, offering a chemically resistant, grease-free stopcock at the standard tolerance level used for routine teaching and laboratory titration work.
Burette Class-B with PTFE Key Stopcock — Specification
| Feature | Detail |
|---|---|
| Material | Borosilicate glass |
| Stopcock | PTFE key stopcock — chemically resistant, does not need grease |
| Tolerance class | Class B |
| Standards | Manufactured to align with ISO 385 (Laboratory glassware – Burettes) and ASTM E287 (Standard Specification for Laboratory Glass Burets) |
| Typical use | Routine teaching and laboratory titration work |
Why a PTFE Key Stopcock
A PTFE key stopcock turns smoothly without the grease a glass stopcock typically needs, and resists attack from most laboratory reagents, which helps keep the stopcock bore clean and free-turning over repeated use. Class B tolerance makes this version suited to everyday teaching and routine laboratory titration, where certified Class A accuracy is not required; see Burette Serialized for the Class A option.
Frequently Asked Questions
What does Class B mean?
Class B is a standard volumetric tolerance level suited to routine teaching and laboratory titration, as distinct from the tighter, individually serialized Class A tolerance used where certified accuracy is required.
Why choose a PTFE stopcock over glass?
A PTFE key stopcock does not need grease, turns smoothly, and resists attack from most laboratory reagents, which helps keep it clean and free-turning over repeated use.
What capacity is available?
Send your required capacity with your enquiry so a quotation can be prepared against the correct specification.
Does the stopcock need maintenance?
PTFE stopcocks generally need less maintenance than glass stopcocks since they do not require greasing; occasional cleaning and rinsing is recommended.
Is a Class A version available?
Yes, see Burette Serialized for the individually numbered Class A option.
Do you export this burette outside India?
Yes, burettes are supplied to institutional and distributor buyers outside India alongside other titration equipment. Confirm packing and quantity requirements at enquiry stage.
Related Products
Other burettes and burette accessories from Lab Glassware Manufacturer: Burette, Burette Serialized, Burette Brush, Burette Clamp Aluminium.
Request a Quote
Ready to order the Burette Class-B with PTFE Key Stopcock for your laboratory, institutional or export order? Contact Us for a quotation, or visit the Tenders page for bulk and institutional procurement.
Last updated: September 2026.