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P a r r I n s t r u m e n t C o m p a n y
5000 Multiple Reactor System (MRS)
Head Configuration.
Each reaction vessel
is equipped with an inlet valve, exhaust valve,
safety rupture disc, and pressure transducer in
addition to an internal thermocouple. The user
can choose to have the valves, transducer and
rupture disc mounted on a gage block connected
directly to the vessel head, or remotely mounted
on the back panel and connected to the valve
with a quick coupling flexible high pressure
hose. The head mounted design makes it pos-
sible to remove pressurized vessels from the
heater/stirrer assembly or to prefill the vessels
in a remote location. The remote panel mounted
arrangement connects all of the pressure inlets/
outlets to each vessel with a single flexible con-
nection for the greatest ease of handling.
The heads of these vessels can also be modified
to include a dip tube for liquid sampling or a cold
finger for cooling. An optional reactor cooling sup-
port rack is available for air-cooling.
Materials of Construction.
Type 316
Stainless Steel is the standard material of
construction for both the vessel with its wetted
parts and the gage block assemblies exposed
to vapors. For investigators working with sys-
tems containing strong mineral acids or other
more corrosive systems these vessels can be
made of most of the Parr standard materials of
construction.
Stirrer Configuration.
Stirring is accom-
plished by use of either PTFE coated or glass
coated magnetic stirrer bars.
Thermocouple Configuration.
Thermocouples are mounted inside the vessel
for the best temperature monitoring and control.
The thermocouples are protected by stainless
steel sheaths which are inserted into a protective
thermowell. These thermowells make it easy to
install and remove thermocouples from the ves-
sels, and also provide additional chemical and
mechanical protection for the thermocouple.
RTD temperature sensors can be substituted
for users who prefer this method of temperature
measurement.
We also offer a redundant thermocouple
option with the thermocouple positioned in con-
tact with the heater.
Gas Manifold.
The gas inlet manifold can
be designed to handle both a purge gas, usually
nitrogen, and a reactant gas, usually hydrogen.
This can be set up to automatically fill each vessel
to the same initial pressure or to manually fill
each vessel to a unique operating pressure.
4871 Process Controller
The Series 5000 Multiple Reaction System
is controlled by a dedicated Parr 4871 Process
Controller. A detailed description of this con-
troller is found in Chapter 4 of this catalog,
pages 95-100.
For this application the controller is set up
to provide:
• Temperature monitoring and PID control
of each individual reactor.
• Pressure monitoring of each individual
reactor.
• Data logging of temperature and pressure
in each reactor.
• Control and logging of the common stirring
speed of the reactors.
The controller provides Ramp & Soak pro-
gramming for individual reaction vessels, digital
inputs and outputs for interlocks, alarms or
other safety features, and additional analog and
digital inputs and outputs to control flow meters
or other accessories which might be added at
some future date. The user’s control station is a
PC running any current Windows operating sys-
tem. A simplified graphical user interface has
been designed for the control and monitoring of
the Series 5000 Multiple Reaction System. The
PC is used strictly as the user interface and data
logging module. All control actions are gener
ated in the 4871 Process Controller (not the PC).
MRS with individually controlled Gas Burettes.
