Condenser Clamp, Extension

Quick Answer: The Condenser Clamp, Extension is an extension condenser clamp: jaws that open wide enough for a condenser jacket, carried on a long rod that fits a boss head, so the condenser can be held well out from the retort stand. The listing currently has no product photograph.

Reach for Distillation Set-Ups

In a distillation the flask, still head, condenser and receiver form a chain that slopes away from the stand. The flask is usually clamped close to the upright, but the condenser runs outward, and its middle can end up well away from the rod. An extension condenser clamp has a long rod that can be pushed out through the boss head until the jaws meet the jacket where it naturally lies, without pulling the condenser toward the stand and straining the joint.

Because this listing has no photograph and the title names no materials, the jaw design (two or three prongs, coated or padded) and the rod length cannot be described here. What the name does fix is the purpose: condenser jaws that open wide enough for a jacket, and a rod that provides reach. Please check those details before ordering in quantity.

It complements a clamp that holds the flask at its neck, such as the co-axial three prong clamp, and the shorter copper oxidized condenser clamp where extra reach is not needed.

Applications

• Simple and fractional distillation, holding the sloping condenser at its midpoint
• Steam distillation of plant oils in teaching labs
• Solvent recovery set-ups where the condenser must reach a receiver on the bench
• Soxhlet extraction, holding the condenser above the extractor

Specifications

Care & Handling

• Set the rod reach before tightening the boss head, then close the jaws on the jacket.
• Clamp around the middle of the jacket and leave the water tubing free.
• Keep the load at full reach light, and support heavy receivers separately.

Why Choose LabEquip

Buyers are typically labs that run distillations with long condensers on standard stands. LabEquip lists the extension condenser clamp in its General Lab Products range; contact us for a description of the jaws and rod before you order.

Frequently Asked Questions

Why does a condenser need an extension clamp?

In a distillation the condenser slopes away from the stand, so its midpoint can be far from the upright. An extension rod lets the clamp reach the jacket where it lies, instead of pulling the condenser toward the stand.

What happens if a condenser is clamped under strain?

The ground-glass joints at each end are forced out of line. That can crack the joint, let vapour escape or make the joint seize. Always line the parts up first, then tighten.

Should the condenser water enter at the top or the bottom?

At the lower end, leaving from the upper end. The jacket then fills completely and the coldest water meets the vapour just before it leaves the condenser.

How many clamps does a distillation set-up need?

Normally two: one at the flask neck and one on the condenser. A heavy receiver or a long adapter may need a third support.

Can it be used for reflux?

Yes. For reflux the condenser stands vertically above the flask, so the extension is used short, just long enough to hold the jacket directly above the flask neck.

Will it fit my boss heads?

It will if the rod diameter falls within the slot range of your boss heads. Measure the rods on your existing clamps and confirm the match when you enquire.

Last Updated: September 2026