PTFE Needle Valve Stopcock
Product Code : EL-GS-10268
Quick answer: A PTFE needle valve stopcock uses a tapered PTFE needle to give fine, gradual control over flow rate at a 90-degree outlet, offering finer adjustment than a standard on/off key stopcock, in a bore size of 0-6mm.
| Bore Size (mm) | Angle | Key Material |
|---|---|---|
| 0-3 | 90° | PTFE |
| 0-6 | 90° | PTFE |
Dimensions follow standard specifications.
Needle Valve vs. Standard Key: When Fine Control Matters
A conventional key stopcock is well suited to simple on/off shut-off, but a needle valve stopcock is the better choice when a laboratory procedure calls for slow, controlled dosing, such as gas flow regulation, drop-wise addition, or low-flow titration. The PTFE needle resists corrosion from aggressive gases and liquids and, unlike a ground-glass key, needs no lubricating grease. For straight-through applications without fine metering, the Straight PTFE Key Stopcock may be more appropriate.
Frequently Asked Questions
What does the 90-degree angle refer to?
The outlet is set at a right angle to the inlet, matching the standard configuration used on burettes and manifold fittings.
Which bore size should I choose?
The 0-3mm bore suits fine metering and drop-wise addition; the 0-6mm bore suits faster, higher-volume flow. Confirm your requirement with our team if unsure.
Is the needle valve resistant to acids and alkalis?
PTFE resists most common laboratory acids, alkalis, and solvents; buyers with an unusual reagent list should confirm compatibility before ordering.
Related Products
- Straight PTFE Key Stopcock
- PTFE Key Stopcock Burette
- PTFE Needle Valve Stopcock, Automatic Burette
- Glass Stopcocks
- Laboratory Glass Stopcocks
Request a Quote
For indicative FOB/CIF export pricing on the PTFE Needle Valve Stopcock, or to request a formal quotation, please contact us or view current tenders.
Last updated: September 2026