Congratulations on receiving your
GPI Commercial Grade Turbine. We
are pleased to provide you with a
product designed to give you maxi-
mum reliability and efciency.
Our business is the design, manufacture, and marketing of liquid handling, agricultural, and recreational
products. We succeed because we
provide customers with innovative,
reliable, safe, timely, and competitively-priced products. We pride
ourselves in conducting our business
with integrity and professionalism.
We are proud to provide you with a
quality product and the support you
need to obtain years of safe, dependable service.
This manual will assist you in
installing and maintaining your GPI
Commercial Grade turbine housing.
(See Figure 1) Information on
computer electronics and accessory
modules are contained in other
manuals. Please reference those as
necessary.
For best results, take the time to fully
acquaint yourself with all information
about all components of your GPI
Electronic Digital Metering System
prior to installation and use. If you
need assistance, contact the distributor from whom you purchased
your turbine.
This symbol is used throughout the manual to call your
attention to safety messages.
Turbine
Housing
Figure 1
WARNING
Warnings alert
you to the potential for personal
injury.
CAUTION
Cautions call
your attention to
practices or pro-
Computer
Electronics
cedures which
may damage your
equipment.
Notes give information that can
improve efciency of operations.
2920789-01 Rev. D
It is your responsibility to make sure
that all operators have access to adequate instructions about safe operating and maintenance procedures.
Read Me!
For your safety, review the major
warnings and cautions below before
operating your equipment.
WARNING
The apparatus enclosure may
contain aluminum and is consid‑
ered to constitute a potential risk
of ignition by impact or friction.
Care must be taken into account
during installation and use to
prevent impact or friction.
WARNING
Part of the enclosure is con‑
structed from plastic. To prevent
the risk of electrostatic sparking
the plastic surface should only
be cleaned with a damp cloth.
1. This equipment is approved to
handle only uids that are compatible with the housing material.
Use only uids that are compatible with the wetted components
of your turbine.
2. When measuring flammable
liquids, observe precautions
against re or explosion.
3. When handling hazardous liquids, always follow the liquid
manufacturer’s safety precautions.
4. When working in hazardous
environments, always exercise
appropriate safety precautions.
5. Always dispose of used cleaning solvents in a safe manner
according to the solvent manufacturer’s instructions.
6. During turbine removal, liquid
may spill. Follow the liquid manufacturer’s safety precautions for
clean up of minor spills.
7. Do not blow compressed air
through the turbine.
8. Do not allow liquids to dry inside
the turbine.
9. Handle the rotor carefully. Even
small scratches or nicks can affect accuracy.
10. When tightening the turbine, use a
wrench only on the wrench ats.
11. For best results, always verify
accuracy before use.
Product Description
GPI Commercial Meter Turbines are
identied by the internal diameter
and the inlet and outlet.
Model 025 – 1 inch (Low Flow)
Model 100 – 1 inch (Mid Flow)
Model 200 – 2 inch (High Flow)
Each of these turbines is designed to
work with on-board computer electronics and/or with one of several
accessory modules that can interface
to a wide variety of reporting and collecting devices.
Liquids flow through the turbine
housing causing an internal rotor to
spin. As the rotor spins, an electrical
signal is generated in the pickup
coil. The electrical signal provides
the output necessary to operate the
on-board computer electronics for
local indication directly on the turbine
or one of several accessory modules
that transmit the signal to external
equipment.
Upon receipt, examine your meter
for visible damage. The turbine is a
precision measuring instrument and
should be handled as such. Remove
the protective plugs and caps for a
thorough inspection. If any items are
damaged or missing, contact your
distributor.
3920789-01 Rev. D
Make sure the turbine model meets
your specific needs. Refer to the
Specications Section and conrm
the following:
1. The owrate is within the limits of
your model.
2. The liquid is compatible with the
turbine’s wetted components.
3. The system’s pressure does not
exceed the turbine’s maximum
pressure rating.
Information specic to your particular
turbine, including serial number and
manufacturing date is printed on the
bottom of the turbine.
For your future reference, it might be
useful to record this information in the
manual in case it becomes unreadable on the turbine.
INSTALLATION
All GPI turbines are designed to
measure ow in only one direction.
The direction is indicated by the
arrow cast-molded in the turbine
outlet. If the opposite direction is
desired, and you are using on-board
computer electronics, rotate the computer electronics 180 degrees prior
to installation.
Flow altering devices such as elbows,
valves, and reducers can affect accuracy. The following recommended
guidelines are given to enhance accuracy and maximize performance.
Distances given here are minimum
requirements; double them for desired straight pipe lengths.
Upstream from the turbine, allow a
minimum straight pipe length at least
20 times the internal diameter of the
turbine. For example, with the 1-inch
turbine, there should be 20 inches
(51 cm) of straight pipe immediately
upstream.
Downstream from the turbine, allow
a minimum straight pipe length at
least 5 times the internal diameter
of your turbine. For example, with
the 1-inch turbine, there should be
5 inches (12.7 cm) of straight pipe immediately downstream. The desired
downstream distance is 10 inches
(25.4 cm).
A typical back pressure of 5 to 50
PSI (0.34 to 3.4 bar) will prevent
cavitation. Create back pressure
by installing a control valve on the
downstream side of the meter at the
proper distance detailed above.
Foreign material in the liquid being
measured can clog the turbine’s
rotor and adversely affect accuracy.
If this problem is anticipated or ex-
perienced, install screens to lter
impurities from incoming liquids.
Model 025:
Maximum Particulate Size
Inches: 0.005
Microns: 125
Mesh: 120
Models 100 and 200:
Maximum Particulate Size
Inches: 0.018
Microns: 500
Mesh: 35
All GPI turbines are tested and calibrated at the factory using state-ofthe-art calibration procedures and
test equipment.
To ensure accurate measurement,
remove all air from the system before
use. To purge the system of air:
1. Ensure some back pressure exists on the turbine in the line.
2. Open the discharge valve or
nozzle and allow uid to completely ll the system. Make sure
the stream is full and steady.
3. Close the discharge valve or
nozzle.
4. Start normal operations.
4920789-01 Rev. D
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