Pressure Equalising Funnels Pear shape
Product Code : LSK-LF-10408
Pressure Equalising Funnels Pear shape (SKU LSK-LF-10408) are pear-shaped addition funnels with a top socket, a PTFE key stopcock and a stem ending in a cone, offered in 100, 250 and 500 ml capacities. The built-in pressure balance lets liquid run into a closed reaction flask without opening it. They serve organic chemistry teaching and research labs. Science Lab Supplies, working from Ambala, India, supplies them to colleges, universities, training institutes, tender contractors and distributors.
Specifications
Each funnel has a pear-shaped body with a ground socket at the top for a stopper or adapter, a PTFE key stopcock to regulate flow, and a stem finished as a cone that seats directly in a matching flask neck. Sockets are listed in 19/26 and 24/29 sizes.
| Parameter | Value |
|---|---|
| SKU | LSK-LF-10408 |
| Body shape | Pear shape |
| Capacities | 100 ml, 250 ml, 500 ml |
| Top socket | 19/26 or 24/29 |
| Stopcock | PTFE key |
| Stem | With cone |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Pressure Equalising Funnel
A pressure equalising funnel adds a reagent slowly to a sealed or refluxing flask; because the space above the liquid is connected to the flask, the stopcock can stay open without the flow stalling. It is standard chemistry lab equipment in India for college and postgraduate synthesis work.
- B.Sc. and M.Sc. organic chemistry: drop-wise addition of a reagent during a synthesis under reflux.
- Reactions run under a closed or inert atmosphere, where the funnel must stay stoppered while liquid is added.
- B.Pharm. and B.Tech. chemistry labs assembling ground-joint glassware set-ups.
Standard Scope of Supply
Each funnel comes with its PTFE key stopcock fitted, the top socket and the cone-ended stem as described. State the capacity (100, 250 or 500 ml) and the socket size (19/26 or 24/29) you need, and the quotation will confirm the exact combination supplied.
Packing, MOQ and Lead Time
Quotations cover anything from a single funnel for a research bench to a set for every student station, and each one sets out packing, delivery time and price for the quantity requested. Round-bottom flasks and other ground-joint items can be listed alongside for a single consolidated offer.
Science Lab Supplies is a registered exporter with an Importer-Exporter Code and can ship to buyers in Ghana, Ethiopia, Tanzania, Uganda, the UAE and Saudi Arabia. Science Lab Supplies is registered for GST (GSTIN 06ADEPJ0574F2ZU). For a price, use the enquiry cart or the contact page, and see the lab tender page for tender enquiries.
Frequently Asked Questions
How does a pressure equalising funnel differ from a plain dropping funnel?
It links the space above the liquid to the reaction flask, so pressure stays balanced and liquid keeps flowing even with the top stoppered. A plain dropping funnel needs its top open to drain steadily.
Which capacities and socket sizes are available?
The funnel is listed in 100 ml, 250 ml and 500 ml capacities, with 19/26 or 24/29 sockets. Tell us which combination you need when you ask for a quotation.
Why is a PTFE key used in the stopcock?
A PTFE key turns smoothly without grease, so it does not contaminate the reagent and is less likely to seize than an ungreased glass key.
Who supplies these funnels?
They are supplied by Science Lab Supplies from Ambala, India, for single-piece orders, laboratory quantities and tenders, together with matching glassware where required.
Related Laboratory Funnels
These funnels from the same range handle controlled liquid addition and separation in synthesis work, so a teaching or research lab can compare stopcock types and body shapes and quote the whole set of addition and separation glassware together.
- Dropping Funnel Pear Shape PTFE Stopcock — pear-shaped addition funnel without pressure equalisation.
- Dropping Funnel Cylindrical, PTFE Stopcock — cylindrical addition funnel with a PTFE stopcock, 50 ml to 1000 ml.
- Separating Funnel with PTFE Key Stopcock — for work-up and liquid-liquid extraction.
- Thistle Funnel — simple long-stem addition for gas preparation.
Browse the full laboratory funnel range or all school lab equipment.
Last updated: 25 September 2026
