General Equipment EP8HL, Руководство оператора

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lower than any material classified in any of the Class I
or Class II groups.
Combustible dusts which are electrically
nonconductive include dusts produced in the handling
and processing of grain, grain products, pulverized
sugar, cocoa, dried egg and milk powders, pulverized
spices, starches and pastes, potato and wood flour, oil
meal from beans and seed, dried hay and other
organic materials which may produce combustible
dusts when processed or handled. Electrically
conductive dusts are those dusts with a resistivity less
than
105 ohm-centimeter. Dusts containing
magnesium or aluminum are particularly hazardous
and the use of extreme caution is necessary to avoid
an ignition and resulting explosion. Explosion severity
is the measure of maximum explosion pressure and
maximum rate of pressure rise. It is the measure of
how violent the ensuing explosion will be. Closely
associated with the maximum pressure and rate of
pressure rise is the length of time that pressure is
exerted on the surroundings. All of these factors
contribute to the total impulse, rather than the force
exerted at any one moment, that determines the
destructiveness of an explosion. This explains in part
why dust explosions, which have slower rates of
pressure rise, may be more destructive than gas
explosions.
Dust that is carbonized or excessively dry is highly
susceptible to spontaneous ignition. Equipment and
wiring of the type defined in Article 100 of the National
Electric Code® as explosion proof shall not be required
and shall not be acceptable in Class II locations unless
approved for such locations.
Complete information relative to the use, handling
and/or manufacture of applicable chemicals and their
explosive properties as pertaining to confined space air
ventilation can be obtained from the National Fire
Protection Association.
FLOW RATES FOR MODEL EP8HL HAZARDOUS
LOCATION,
PORTABLE AIR VENTILATION
BLOWER.
FREE AIR 1277.4 CFM (35.7 CMM)
ONE 90˚ BEND 738.0 CFM (20.7 CMM)
TWO 90˚ BENDS 578.8 CFM (16.2 CMM)
Flow rates for the EP8HL Blower were calibrated by
the Colorado Engineering Experiment Station, Inc.
Blower components were tested per AT&T standard
EL2723/PL2709 in a chamber built in accordance with
AMCA standard 210-67. The test was performed with a
single, 8 inch (203 mm) diameter x 15 feet (4.5 m)
flexible, reinforced duct connected to the Blower outlet.
Flow rates were obtained with a nominal electric motor
speed of 1725 RPM. The published flow rates are
intended to serve only as a reference. Manufacturing
tolerances and specific operating parameters will affect
the overall flow rate(s) for each particular Blower.
The air flow rate decreases as the length of the
flexible, reinforced duct increases for both exhaust
and suction job applications. Measured flow rates
(with the use of ducts) will increase with the use of
a flexible, reinforced duct less than 15 feet (4.5 m)
in length and decrease with the use of a flexible,
reinforced duct greater than 15 feet (4.5 m) in
length. Flow rates will also vary with the specific
ducts manufactured and/or supplied by various
Original Equipment Manufacturer (OEM) sources.
C ONNECTING THE MODEL EP8HL BLOWER TO
THE POWER SOURCE.
BEFORE utilizing the Blower, read the Operator's
Manual and view the Safety and Operational
Information Video Tape supplied with each unit. If, after
reading the Operator's Manual and viewing the Safety
and Operational Information Video Tape, there are any
questions regarding the proper operation of the Blower,
contact the dealer or the Customer Service
Department for assistance BEFORE utilization. There
is no charge for this service.
1) Position the Blower into any relative wind upwind
from the work location and with the air inlet facing the
wind to maximize the air flow.
2) The voltage, frequency and phase of the power
supply should be consistent with the motor nameplate
rating. The motor will operate satisfactorily on voltages
within 10% of the nameplate value or frequency within
5 percent. The combined variation must not exceed 10
percent. The Blower is designed to operate from a
EP8HL HAZARDOUS BLOWER
FORM GOM7069501, VERSION 1.2
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