115
P a r r I n s t r u m e n t C o m p a n y
1 - 8 0 0 - 8 7 2 - 7 7 2 0
Serpentine Cooling
Coil 1000 mL
Spiral Cooling
Coil 1000 mL
I
nternal cooling coils are
available for all but the
smallest Parr reactors. These
coils provide an extremely
effective means of removing
heat from the vessel to control
an exothermic reaction or for
cooling the reactor at the end
of a test. Since heat is trans-
ferred through the relatively
thin wall of the coil instead of
the thick wall of the vessel,
cooling rates are generally
much faster than heating rates;
particularly at temperatures
above 80 °C. Water is normally
used as the cooling medium
although compressed air
can be used for modest
cooling loads. Cooling coils
are offered in three standard
configurations:
Single Loop
- Single loop
coils consist of a vertical run of
tubing formed into a “hairpin”
shape. These are normally
installed on small reactors
where there is minimum space
available.
Serpentine Coils
-
Serpentine coils consist of six
to eight vertical runs of tubing
uniformly spaced around the
circumference of the vessel.
These coils provide reasonable
surface area, minimum inter
ference with stirring patterns,
a reasonable amount of baf-
fling, and ease of cleaning and
maintenance.
Spiral Coils
- Spiral coils
consist of multiple loops
wound just inside the inside
diameter of the vessel. They
are normally available only
for the 4" and 6" ID vessels
although other sizes have been
built on special order. They
do maximize the cooling area
available, but sometimes at
the expense of uniform stirring
and ease of cleaning.
The individual reactor
specifications will dictate the
style of coil or coils available
for each reactor. On some
reactors the coils are included
as standard while on some
reactors they are optional.
Cooling coils are available
in the same choice of materials
as the reactor bodies them-
selves. All cooling coils are
removable. Plugs are available
to close the openings in the
head and in most cases these
openings can be converted to
alternate inlets/outlets if cool-
ing is not required.
Glass Liners 2000 and 1000 mL Sizes
Temperature Limit: 565 ˚C
PTFE Liners 2000 and 1000 mL Sizes
Temperature Limit: 225–250 ˚C
Liners
Fits
ID, in.
Cylinder
Size, mL
Glass
Liner
Part No.
PTFE
Liner
Part No.
1.3
50
1431HC
1431HCHA
1.3
100
1431HC2 1431HC2HA
1.5
75
2920HC 2920HC2HA
2-1/2 250
762HC10 NA
2-1/2 500
762HC2 NA
2-1/2
300
762HC
762HC4HA
2-1/2
450
762HC2
762HC5HA
2-1/2
600
762HC3
762HC6HA
2
100
762HC7
762HC7HA
2-1/2
160
762HC8
762HC8HA
3-1/4 600
2312HC 2312HC3
3-1/4 1200
2312HC2 2312HC4
3-3/4
1000
1441HC
1441HCHA
3-3/4
1800
1442HC
1442HCHA
4
1000
398HC
398HCHA
4
2000
399HC
399HAHA
6
1 Gallon 894HC
894HC4HA
6
2 Gallon 894HC2
894HC5HA
R
emovable, open top,
cylindrical liners made
either of borosilicate glass
or PTFE can be furnished
to fit most Parr reactor and
most of the general purpose
vessels. These liners slide
into the cylinder and require
no additional fittings, but
they may not coordinate with
some alternate accessories
and stirrers. Although they
will not keep corrosive vapors
from reaching the surfaces of
the cylinder and head, they
make it much easier to add
and remove liquid reactants,
and they give some protection
to the cylinder when working
with corrosive solutions. It
must be noted, however, that
adding a PTFE liner will slow
the heat transfer rate into and
out of the vessel, and it may
be necessary to adjust the
temperature control method to
prevent overheating.
Liners
Cooling Coils
O p t i o n a l F i t t i n g s
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