Parr Instrument Series 4530 - Manual (Page 6)

Floor Stand Reactors
P a r r I n s t r u m e n t C o m p a n y 6
INSTALLATION
Pressure and Temperature Limits
The working pressure and temperature at which any
reactor or pressure vessel can be used will depend
upon the design of the vessel and the materials
used in its construction. Since all materials lose
strength at elevated temperatures, any pressure
rating must be stated in terms of the temperature at
which it applies. The standard material of construc-
tion for Parr Instrument Company is Type 316 Stain-
less Steel.
Limits for vessels made of other materials and for
other operating temperatures can be obtained from
Parr Customer Service. No attempt should be made
to increase these limits by making alterations or by
substituting components that are not recommended
by the Parr Instrument Company. It must also be
understood that lower pressure and temperature
limits may be required for modifi ed reactors and for
vessels made of special alloys.
Limits for vessels will be determined by the physi-
cal characteristics of the vessel material and will be
prescribed on an individual basis.
The maximum working pressure and temperature
for any vessel is governed by the design of the
vessel and the strength of the material from which
it is constructed. There is also a close relationship
between working pressure and temperature since
the strength of any material will normally fall off
as the temperature is increased. Temperature and
pressure limits are also affected by the physical
properties and temperature limits of the gaskets and
seals used in the vessel, and by any valves, gages
or other fi ttings attached to the vessel. Obviously,
the safe operating pressure of any system can be no
higher than that of its lowest rated component.
All Parr reactors show the maximum safe operating
pressure and temperature imprinted on the cylinder.
The standard material of construction for Parr In-
strument Company is Type 316 Stainless Steel. The
working pressure and temperature in these one and
two liter reactors must not exceed the following
maximum limits:
Pressure Vessel and Temperature Limits
Vessel
Material
Maximum
Pressure
Maximum
Temperature
T316SS 1900 psig 350 °C PTFE Flat Gasket
T316SS 1900 psig 275 °C FFKM O-ring
T316SS 1900 psig 220 °C FKM O-ring
ASSEMBLE THE REACTOR
These reactors require at least 10 square feet of
workspace in a well-ventilated area with convenient
access to an electric outlet, running water and a
drain. This unit needs to be placed at least 10 inches
away from walls or fl ammable materials.
1. Set the Temperature Controller near the reactor,
leaving a space of at least six inches between
the controller and the base of the reactor so
that the controller will not be unduly affected by
radiant heat. Connect the reactor to the control-
ler using information contained in its Instruction
Manual No. 548M or follow the steps below.
Labeled connections are provided on the rear
panel of the controller.
Parr Cooling Only:
The Parr Cooling output connector is to be used
only with Parr Instrument Company cooling sole-
noid valve assemblies supplied with the appropriate
cooling power cord.