These columns have an accurately fitted Dufton glass spiral which can be removed for cleaning purposes etc. This type of column has proved exceedingly successful in gas analysis.
Socket size
QFC1/12 QFC1/22 QFC2/13 QFC2/23
19/26 19/26 24/29 24/29
Vigreux columns
For ease of operation, relative efficiency and throughput, the Vigreux is probably the most practical and commonly used fractionating column. The shape of the indentations, which project towards the centre of the column, ensures intimate contact between the vapour and the liquid adhering to and running from them and has exceptional efficiency for such a simple unit.
Socket size
QFC3/13 QFC3/23 QFC3/14
24/29 24/29 29/32
Cone Approx. size
24/29 360 24/29 600 29/32 360
effective length, mm
Sets of points
7
12 7
Raschig rings
QFC8/06 66 QFC8/09 99
Note: The above column packings are supplied in minimum quantities of 1 litre.
Packing support
These packing supports will hold the smallest column packing normally used. To fit
QEX13/12 QEX13/23 QEX13/25 QEX13/26
socket size mm 19/26
24/29 34/35 40/38
16 21 29 35
Diameter
Cone Approx. size
19/26 150 19/26 300 24/29 150 24/29 300
effective length mm
Approx. overall height mm
270 425 290 435
Plain columns
Designed for use with the various types of column packing which are available. Socket Cone
size
QFC7/23 QFC7/43
24/29 24/29
size
24/29 24/29
effective overall length height mm mm
250 500
Raschig ring packing for plain columns
Raschig rings are short lengths of glass tubing, usually having the same length as the diameter.