Pulsafeeder Isochem GM12 Series, Installation, Operation, & Maintenance Instruction

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INTRODUCTION
Isochem Series pumps use sealless technology
which eliminates the need for a rotary mechanical
seal and enables the pump to handle hazardous
fluids safely with zero leakage.
Some Isochem Gear pumps accept standard NEMA
56C and 143/5TC motors. This enables the pumps
to be close coupled which provides greater
assembled strength, complete enclosure of all
moving parts and compact design. This also
eliminates the need for special base plate
mountings, couplings or complicated drives.
Isochem Gear pumps are also available to accept
standard large flange C face metric motors with feet
in 71, 80 and 90 L frame sizes.
All Isochem pumps transmit rotation from the motor
shaft to the pump shaft by means of a magnetic
drive coupling. The principle of operation of the
magnetic drive coupling is that an encapsulated
driven magnet assembly is mounted on the end of
the pump shaft. It is then contained by a closed end
"can" which seals against the pump front housing
with a static Teflon O-ring. Then a drive magnet
assembly attached to an electric motor shaft rotates
around the containment can. When the drive
magnet assembly rotates, lines of magnetic force
cause the driven magnet assembly to rotate which
in turn causes the pump shaft to rotate.
The magnetic drive couplings for all Isochem Series
are designed for satisfactory operation of the pump.
The magnetic couplings have a built in safety
feature which allows them to "decouple" if the
coupling torque limit (listed in the pump
specification chart) is exceeded. This could happen
if a piece of foreign material were to jam the pump
gears or if unusually high torque was developed on
pump start-up. Unlike many other magnetic drive
pumps Isochem pumps use permanent, rare earth
magnets which can run decoupled without losing
their magnetic strength provided magnet
temperature does not exceed 450°F (232°C).
Note: If the pump is allowed to run for an
extended period of time decoupled, high
temperatures could be generated which
ultimately would cause the loss of magnetic
strength.
Isochem pumps have all the standard features of
ECO Gearchem pumps such as continuous operation
over wide temperature and pressure variations, self-
priming, constant volume pulsation free flow, able to
handle wide viscosity variations and ease of
inspection and maintenance.
To achieve successful operation and maximum life
from your pump make sure that the pump is
compatible with the service and operating conditions
of your application. The pump materials of
construction and other details are specified by the
pump model number. This along with the "Significant
Model Numbering System and Selection Table" will
fully describe the components of the pump.
EQUIPMENT INSPECTION
1. Check all equipment for completeness
against the order and for any evidence of
shipping damage. Shortages or damage
should be reported immediately to the carrier
and to your Isochem representative.
2. If the pump is not going to be installed
immediately, the following steps should be
taken:
o
Leave pump in original shipping
carton.
o
Store indoors in a dry ambient
atmosphere. Avoid temperature
variations.
o
Leave all shipping plugs in place.
o
Contact the motor manufacturer for
specific motor storage information.
3. These instructions should be read carefully
by the personnel responsible for installation,
operation and maintenance of the equipment
and kept in a convenient place for ready
reference. It is recommended that a copy of
the Isochem order be kept with this manual
as well as a written record of the pump
model and serial number which is on the
name tag attached to the pump. A space
has been provided inside the front cover of
the manual to record these numbers.