A condenser having very large surface area over a relatively short effective length by employing two coils which are independent of each other. If desired they can be fed from separate water supplies.
Approx. surface area
QC4/13/SC
Socket size
x 10–2m2 5.5
Double surface, Davies
With increased surface area and effectiveness compared with a corresponding Liebig condenser.
Approx. surface area
QC5/11/SC QC5/12/SC QC5/13/SC QC5/22/SC
QC5/23/SC QC5/24/SC
1.7 2.3 2.3
3.0 3.0
Socket size
x 10–2m2 1.7
14/23 19/26 24/29 19/26
24/29 29/32
Cone size
14/23 19/26 24/29 19/26
24/29 29/32
Approx. effective x overall
lengths, mm 160 x 275
160 x 295 160 x 300 205 x 340
205 x 345 205 x 365
QCX6/22/SC QCX6/33/SC
Allihn
An inexpensive condenser, giving greater surface area than the corresponding Liebig type due to the bulb sections. This type is normally used under reflux. Approx.
surface area
QCX7/02/SC QCX7/03/SC QCX7/04/SC QCX7/05/SC
QCX7/06/SC QCX7/08/SC QCX7/33/SC
1.3 1.3 1.3
1.3 1.5 1.8
Socket size
x 10–2m2 1.3
— — — —
— —
24/29
Cone size
19/26 24/29 29/32 34/35
40/38 50/42 24/29
Approx. effective x overall
lengths, mm 250 x 400
250 x 405 250 x 415 250 x 335
250 x 365 250 x 365 400 x 545
24/29
Cone size
24/29
Approx. effective x overall
lengths, mm 207 x 390
QC6/13/SC Jacketed coil
A double surface condenser having a coil as an inner cooling surface. This type has approximately twice the surface of a plain double surface condenser of the same effective length.
Approx. surface area
4.0
Socket size
x 10–2m2 4.0
19/26 24/29
Cone size
19/26 24/29
Approx. effective x overall
lengths, mm 160 x 360
160 x 365 Inland Revenue
Used for standard Inland Revenue test and control methods by brewers etc, the Inland Revenue condenser employs the use of coolant flow outside the coil. This condenser is very efficient but must not be used for fast rates of distillation. It is particularly useful for removing condensable vapours from non-condensable gases.
