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 pressure balance lets liquid run into a closed reaction flask without opening it, which suits organic chemistry teaching and research labs. Colleges, universities, training institutes and tender contractors can get them through Science Lab Supplies, whose quotations are prepared in Ambala, India.
Specifications
Each specification of the pear-shaped pressure equalising funnel appears in the table below. In short, the body carries a ground socket at the top for a stopper or adapter, a PTFE key stopcock to regulate flow, and a cone-ended stem that seats in a matching flask neck, with 19/26 or 24/29 sockets.
| Specification | Value |
|---|---|
| SKU | LSK-LF-10408 |
| Type | Pressure equalising funnel |
| Body shape | Pear shape |
| Capacity options | 100 ml, 250 ml, 500 ml |
| Top fitting | Socket |
| Socket sizes | 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 useful 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, with the flask warmed in a Flask Electric Heater.
- 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, for instance on a 19/26 Distillation Apparatus, held at the right height with a Boss Head Clamp.
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). Tell us the capacity and socket you want through the contact page or the enquiry cart; synthesis-lab tenders have their own route on the lab tender page.
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 comes 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 no stopcock grease needs to touch the reagent, and it is less likely to seize than an ungreased glass key.
Who supplies these funnels?
Quotations for them come from Science Lab Supplies in Ambala, India, covering single pieces, laboratory quantities and tenders, and matching flasks, condensers or clamps can be priced on the same document.
Related Addition Funnels, Flasks and Condensers
These funnels, reaction flasks and distillation items handle controlled addition, separation and condensing in synthesis work, so a teaching or research lab can compare stopcock types and joint sizes and quote the whole ground-joint assembly together.
- Dropping Funnel Pear Shape PTFE Stopcock — drip stem, PTFE stopcock in 2.5 or 4 mm bore, stem inside the cone.
- Dropping Funnel Cylindrical, PTFE Stopcock — cylindrical body, available with a PE stopper.
- Separating Funnel with PTFE Key Stopcock — white enamel printing, 125 ml to 2000 ml.
- Thistle Funnel — 30 cm stem for adding liquid low down in a narrow-necked flask.
- Flask Pear shape with Two Neck — borosilicate flask with its side neck set at 25°.
- Flask Reaction With Glass Stopcock — 2 mm glass stopcock with a spring retention device.
- Fractional Distillation Assembly — 19/26 joints, Vigreux column and four joint clips.
- Liebig Condenser — 200 mm jacket with the inner tube integral with the body.
Browse the full laboratory funnel range, the Laboratory Flasks range, or all school lab equipment.
Last updated: 9 October 2026
