parr 4520, Operating Instructions Manual, Page: 5 / 32

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4520 Bench Top Reactors
Parr Instrument Company
Intended Usage
This system has been designed for use as
a high pressure reactor system. It has been
designed, built, and tested to strict physical
and electrical standards. However, it is the
user's responsibility to install and operate it in
conformance with local pressure and electrical
codes. If this equipment is used in a manner
beyond its intended usage, the protection
provided by the equipment may be impaired.
User’s Responsibility
All Parr reactors and pressure vessels are
designed and manufactured with great care to
assure safe operation when used within their
prescribed temperature and pressure limits.
But . . . the basic responsibility for safety when
using this equipment rests entirely with the
user; who must:
1. Select a reactor or pressure vessel that
has the capability, pressure rating,
corrosion resistance, and design features
that are suitable for its intended use. Parr
engineers will be glad to discuss available
equipment and material options with
prospective users, but the final
responsibility for selecting a reactor or
pressure vessel that will perform to the
user's satisfaction in any particular reaction
or test must rest with the user - not with
Parr.
In exercising the responsibility for the
selection of pressure equipment, the
prospective user is often faced with the
choice between over-or under-designed
equipment. The hazards introduced by
under-designed pressure vessels are
readily apparent, but the penalties that
must be paid for over-designed apparatus
are often overlooked. Recognizing these
criteria, Parr reactors and pressure vessels
are offered in several different styles, each
designed for convenient use in daily
operation within certain temperature and
pressure limits, using gaskets, closures,
and other elements carefully selected for
safe operation within the limits specified for
that design. But in order to preserve the
validity of these designs, all temperature
and pressure limits must be observed, and
no attempt should be made to increase
these limits by making alterations or by
substituting components which are not
recommended by Parr Instrument
Company.
2. Install and operate the equipment within
a suitable barricade, if required, with
appropriate safety accessories and in full
compliance with local safety codes and
rules.
All standard Parr pressure vessels are
provided with either a suitable relief device
or a means to attach one (typically in the
form of a plugged opening). When a
pressure vessel is delivered without a
pressure venting device, it is the
customer’s responsibility to provide
pressure relief in order to protect the
operator and the equipment from
destructive high pressures. If you need
more information or need help in selecting
a proper relief device, please contact Parr
Instrument Company.
3. Establish training procedures to ensure
that any person handling the equipment
knows how to use it properly.
4. Maintain the equipment in good
condition and establish procedures for
periodic testing to be sure the vessel
remains structurally sound.
Unpack Carefully
Unpack the equipment carefully and check
all the parts against the packing list. If
shipping damage is discovered, report it
immediately to the delivering carriers. The
vessel, motor, heater, and temperature
controller may be packed separately for
convenience in shipping, but these parts are
easily reassembled. Examine the
components closely for any loose parts or
shipping damage and be sure to check all
layers of packing materials thoroughly so as
not to overlook any parts which might
otherwise be discarded.