44
P a r r I n s t r u m e n t C o m p a n y
Series 4555 10 & 20 Liter Reactor Systems
Series Number:
4555
Type:
General Purpose
Stand:
Floor Stand
Vessel Mounting:
Moveable
or
Fixed Head
Vessel Sizes, Liters:
10 and 20
Standard Pressure
MAWP Rating, psi (bar):
1900 (131)
Maximum Operating
Temperature, °C:
225
w/ FKM O-ring
275
w/ FFKM O-ring
350
w/ PTFE Flat Gasket
T
he Model 4555 and 4557
Reactors with their 5 gallon
(18.75 L) capacity are the largest
stirred reactors offered by Parr.
The 4556 and 4558 Models are
similar units with a 10 liter (2.6
gal) volume which falls between
the larger 5 gallon design and
the smaller 1 and 2 gallon mod-
els in the 4550 Series. Vessel
styles are offered in a moveable
head or fixed head design.
These reactors are available
with an FKM O-ring seal for
operating temperatures to
225 °C, and FFKM O-ring for
temperatures to 275 °C, or with
a flat, PTFE gasket for operat-
ing temperatures up to 350 °C
maximum.
In the moveable head design,
the vessel is held in a support
system which minimizes the
physical effort required to
handle these heavy compo-
nents. The hoist is attached to a
support column which provides
a convenient means for lifting
the head and cylinder out of the
stand. These components may
be transferred to the holding
position on the right side of the
stand. Vessels equipped with
a bottom drain valve will prob-
ably remain in the heater most
of the time, but can be lifted out
when necessary.
The fixed head support stand
features hinged split-rings that
swing to either side allowing
the head to remain fixed to
the stand while a pneumatic
lift allows the cylinder to be raised and lowered.
When lowered, the cylinder can be slid forward
for cleaning and servicing.
These reactors are generally used for pilot
plant or for custom chemical production pur-
poses, usually with a variety of attachments
added to the basic units. Various heaters,
larger motors, heavier stirrer drives and remote
controls appropriate to the size of these reactors
have been designed and are available.
Modified
versions of these units are available with
higher working pressures and temperatures.
4557 Floor Stand Reactor, Flexible Mantle Heater, with Split Rings and Pneumatic Lift.
Below: Hinged Split Rings open revealing Serpentine Cooling Coil, with Heater and
Vessel lowered via Pneumatic Lift.
