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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
Series 5400 Continuous Flow Tubular Reactor Systems
Typical flow rates for pumps of this type
range up to 10 or 40 mL per minute. Pumps are
available to accommodate manual control from
their digital faceplate or computer-control from
a 4871 Process Controller.
Chemical feed pumps are our recommenda-
tion for continuous feeding of liquids when the
desired flow rate is greater than 2 liters per hour.
Parr can assist with the feed pump selection.
We will need to know the type of liquid; the
minimum, typical, and maximum desired feed
rate; the maximum operating pressure; and any
special operating considerations such as explo-
sion proof operation or corrosion possibilities.
Back Pressure Regulators
In addition to supplying gases to a reaction
through electronic mass flow controllers, the
reactor is kept at a constant pressure by install-
ing a Back Pressure Regulator (BPR) downstream
of the reactor. This style of regulator will release
products only when the reactor pressure exceeds
a preset value.
When a BPR is used in conjunction with
mass flow controllers, the user is assured that a
constant flow of gas is passing through a reac-
tor, which is being held at a constant pressure.
This provides for the highest degree of control
and reproducibility in a continuous-flow reactor
system.
Cooling Condensers
It is often desired to cool the products of
the reaction prior to handling them. For this
purpose, tube-and-shell heat exchangers are
available to act as the cooling condensers.
An adaptation of our standard condensers
provides an excellent design. Descriptions and
available sizes are found in Chapter 5 of this
catalog on page 109.
Gas/Liquid Separators
Tubular reactors operating in continuous-flow
mode with both gas and liquid products will
also require a Gas/Liquid Separator for smooth
operation. The separator is placed downstream
Tubular Reactor System on Cart with Flexible Mantle Heater,
two Mass Flow Controllers, one Liquid Pump, and Manual Back
Pressure Regulator.
Tubular Reactor System on Floor Stand with 3-zone Flexible
Mantle Heater, one Mass Flow Controller, one Liquid Pump, and
a High Pressure Gas/Liquid Separator.
