Separating Funnel Gilson PTFE Stopcock
Product Code : EL-F-10115
Quick answer: This is a Gilson-pattern separating funnel fitted with a PTFE stopcock and supplied with a PE (polyethylene) stopper, used for liquid-liquid extraction and immiscible-layer separation. It is available in six capacities from 50ml to 2000ml, with bore sizes of 2.5mm, 4mm or 6mm.
| Specification | Detail |
|---|---|
| Product | Separating Funnel Gilson PTFE Stopcock |
| Body pattern | Gilson |
| Stopcock type | PTFE |
| Stopper | PE (polyethylene) |
| Capacities | 50ml, 100ml, 250ml, 500ml, 1000ml, 2000ml |
| Bore sizes | 2.5mm, 4mm, 6mm |
PTFE Stopcock and Bore Size for Extraction Work
A PTFE stopcock resists attack from most common organic solvents used in liquid-liquid extraction and needs no grease, which keeps the lower layer free of contamination during a separation. Bore size affects flow control at the point of draining the lower layer: the 2.5mm bore gives the finest control for a slow, dropwise cut between layers, while the 6mm bore drains faster where a clean, well-separated interface is not in question.
Frequently Asked Questions
What capacities are available?
50ml, 100ml, 250ml, 500ml, 1000ml and 2000ml.
What bore sizes does the PTFE stopcock come in?
2.5mm, 4mm and 6mm, letting you choose finer flow control or faster draining depending on the separation being performed.
Why choose a PTFE stopcock over a glass key stopcock?
PTFE resists most organic solvents used in extraction work and needs no stopcock grease, avoiding a possible source of contamination in the separated layer.
Related Products
Explore more from the Funnel range: Separating Funnel Gilson Solid Glass Stopcock, Dropping Funnel Pear Shape PTFE Stopcock, and the full Laboratory funnel category.
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Last updated: September 2026.
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