Parr Instrument 4560 User Manual

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4560 Mini Bench Top Reactors
Parr Instrument Company
Revision 6-28-02
EXPLOSION PROOF OPERATION
If the local safety code requires that
equipment installed in the user’s laboratory
must be explosion proof there are four
possible ignition hazards to be considered:
1. The Motor
The standard variable speed motor is not
explosion proof, yet these motors are not
unduly hazardous if operated in a well
ventilated location where care is taken to
prevent the accumulation of explosive
gases or vapors. To eliminate any
possible spark hazard originating at the
motor, Parr can furnish an air motor as
described previously, or the Reactor can
be equipped with a variable speed,
explosion proof motor which is approved
for use in Class 1, Div. 1, Groups C & D,
and Class 2, Groups E, F, & G
atmospheres. Explosion proof motors
are furnished with a temporary power
cord and plug which are not explosion
proof. The user should remove this
temporary wiring and replace it with an
explosion proof switch and wiring which
will comply with the local electrical code.
2. The Temperature Controller
The Temperature Controllers furnished
with these reactors contain switches and
other elements which are not explosion
proof. The minimal spark hazard
associated with these units can be
resolved by installing the controller in a
remote location outside of the hazardous
area or by enclosing it in an approved
explosion proof housing. If enclosed
within a positive pressure, clean air
housing, the discharge from the housing
must be directed into a safe area. If
requested, Parr will furnish the long lead
wires needed to mount the controller in a
remote location. If the controller is to be
installed in an explosion proof housing,
the user must provide the necessary
housing and installation.
3. The Heater
The elements in the heater could be
dangerous in an explosive atmosphere if
the surface temperature of the element
becomes high enough to ignite
flammable vapors. This hazard must be
evaluated for each individual installation
since major modifications are required if
the heater must be isolated from the
surrounding atmosphere. Users who
consider this a significant hazard are
urged to contact the Parr Instrument
Company for further discussion and
suggestions which might be helpful. Parr
is currently offering aluminum block
heaters and circulating jacketed cylinders
which can be used in hazardous
environments.
4. The Wiring
Unless specifically designed for use in
hazardous atmospheres, the wiring in
these reactors will not meet the
standards prescribed for explosion proof
equipment. Optional intrinsically safe
barriers are also available.

Parr Instrument 4560 Specifications

General

Brand	Parr Instrument
Model	4560
Category	Laboratory Equipment
Language	English