GPI FLOMEC QM Series User manual

921528-01 Rev. F
04/2021
General Information ���������������������������2
Installation �����������������������������������������3
Operation �������������������������������������������4
Calibration �����������������������������������������5
Maintenance ��������������������������������������5
Troubleshooting ���������������������������������6
Specications ������������������������������������7
Informative Table - Diesel ����������������� 8
Informative Table - Unleaded ����������� 9
Illustrated Parts List �������������������������10
Parts and Service ����������������������������15
TABLE OF CONTENTS
SAVE THESE INSTRUCTIONS
QM Series Positive Displacement Fuel Meter
Owner’s Manual
To the owner…
Congratulations on receiving your
FLOMEC® QM150/QM240 or GPRO®
QM40 Meter� We are pleased to provide
you with a meter designed to give you
maximum reliability and efficiency�
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�
Great Plains Industries, Inc� is a member
of the Petroleum Equipment Institute.
Victor Lukic, President
Great Plains Industries, Inc�

2
GENERAL INFORMATION
The purpose of this manual is to
assist you in installing, operating and
maintaining your mechanical fuel meter�
Please take a few moments to read
these instructions before installing and
operating your fuel meter�
SAFETY INSTRUCTIONS
The following safety alert symbols are
used in this manual�
DANGER
DANGER indicates a hazardous
situation which, if not avoided, will
result in death or serious injury.
WARNING
WARNING indicates a hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTION
CAUTION indicates a hazardous
situation which, if not avoided, may
result in minor or moderate injury.
It is your responsibility to:
•Know and follow applicable na-
tional, state and local safety codes
pertaining to installing and operat-
ing equipment for use with am-
mable liquids�
•Know and follow all safety precau-
tions when handling petroleum
fuels
•Ensure that all equipment operators
have access to adequate instruc-
tions concerning safe operation and
maintenance�
Appropriate Use of QM Meter:
2�
DANGER
Observe precau-
tions against re or explosion when
dispensing fuel� Do not operate the
meter in the presence of any source
of ignition including running or hot
engines, lighted cigarettes, or gas
or electric heaters�
3�
WARNING
Any components
such as hose, nozzle, or pump
added to your meter must be stati-
cally grounded and approved for
use with petroleum fuels�
4�
WARNING
Avoid prolonged
skin contact with petroleum fuels�
Use protective goggles, gloves,
and aprons in case of accidental
splashing or spillage� Change
saturated clothing and wash skin
contact areas promptly with soap
and water�
This meter is intended for use with
pump systems up to 40 GPM (150
LPM) flow range (not intended for
gravity flow systems)� Using
mechanical gears, these meters
translate flow data from positive
displacement oval gears into
calibrated units which are indicated on
the face of the meter� This meter is
factory calibrated for diesel fuel� Field
calibration feature is available for
other fluids, see Calibration section�
This meter is for use only with
thin viscosity petroleum fuels
such as gasoline, gasoline-
ethanol blends (up to E15),
diesel, diesel blends (up to B20),
kerosene, aviation gasoline
AVGAS 100LL, and kerosene
grade Jet A.
WARNING
QM40 is approved for ground-based
refueling only. Do not use in or on
aircraft. Please consult NFPA 407 for
recommended safety requirements
during ground fuel servicing of aircraft
using petroleum fuels.
AVIATION NOTE:
1.

3
INSTALLATION
Before installing your meter, review
the safety instructions given above�
Examine your meter to make sure
there are no visible signs of shipment
damage� Plan your meter installation
by reviewing the following procedures�
Your system must be mounted on a
vented tank� If the tank is unvented,
your local dealer or distributor can
supply a pressure cap�
If the meter is located in a rigid piping
system where the fluid is trapped
(for example, by gravity, valves or
nozzles) thermal expansion of the uid
can create pressure spikes that can
damage a meter� Install a thermal relief
valve or otherwise allow for thermal
expansion of the uid�
The owmeter MUST be mounted so
that the rotor shafts are in a horizontal
plane� Mounting the meter with the
mechanical display facing horizontally
will orient the rotor shafts correctly�
The mechanical display should never
face upwards or toward the ground�
The weight of the rotors must be
supported by the horizontal rotor shafts�
If installed incorrectly, performance,
life or accuracy could be affected�
(see Figure 1)
Liquid can ow in a horizontal direction,
or a vertical direction, but in each case
the rotor shafts must be in a horizontal
plane�
It is preferred to install the ow-meter
upstream of a ow control or shut-off
valve, as the back pressure provided
by the valve will be benecial to system
accuracy� The flow meter should
remain full of liquid at all times when
connected�
Do not operate the ow-meter directly
discharging to the atmosphere�
Prior to installation, determine whether
horizontal or vertical ow is required�
For vertical ow installations the liquid
should travel from bottom to top, i�e�
it should rise vertically through the
ow-meter� This will ensure that the
ow-meter remains full of liquid, and
will prevent air entrapment in the meter�
The back of the meter housing is
embossed with “INLET” and “OUTLET”
adjacent to its respective port to assist
in correct piping connections�
gure 1
Correct
Horizontal Flow
Vertical Flow
InCorrect
Correct

4
Changing Display Orientation
1� The mechanical display case can
be removed, rotated and reinstalled
for easy reading with either horizon-
tal or vertical ow� (see Figure 2)
2� Using the 5mm hex L-wrench pro-
vided with the meter, remove the (4)
M6 socket screws that attach the
register case to the housing�
3� Without separating the mechanical
display from the housing, rotate to
desired orientation�
4� Reinstall the (4) M6 socket
screws and tighten to 42-46 lb-in
[4�7-5�2 N•m] torque�
Note: By first removing the (4) M4
socket screws and top cover, better
interior viewing can be achieved� This
is not a mandatory step though�
figure 2
Meter Installation
1� Remove the tape or the protective
plugs from the meter inlet and
outlet ports�The inlet port has
a 100 mesh stainless steel
conical strainer installed�
CAUTION
The mesh strainer must always be
installed when operating the meter;
otherwise, particles may enter the
meter chamber and disrupt the
smooth operation of the oval gears�
2� Wrap threaded male connections
with thread tape or use a pipe
sealant compound compatible with
petroleum fuels�
3� Install the meter on the pump us-
ing an appropriately sized nipple�
The bottom of the meter housing
is embossed with “INLET” and
“OUTLET” adjacent to its respec-
tive port to assist in correct
piping connections� For modular
applications with QM40, apply o-
rings and tighten 4 inlet and outlet
bolts with applicable outlet fitting.
See figure 4a, 4b, and 4c.
4� Install hose, nozzle, or filter onto
the system and tighten.
OPERATION
ALWAYS FOLLOW SAFETY PRECAUTIONS
WHEN OPERATING THIS EQUIPMENT. REVIEW
THE SAFETY INSTRUCTIONS. Before each
use, visually check the meter to ensure
it is securely connected to other system
components and there is no leakage�
Promptly wipe spilled fuel from the
meter’s exterior and other system
components�
The large meter display represents
the Batch Total for each fuel delivery�
Before dispensing, reset the Batch
Total to zero by turning the knob� (see
Figure 3)
gure 3
The small display represents the
Cumulative Total of all fuel deliveries
and cannot be reset�

-----------------------------------------------------------------------------------
5
QM40 Modular Configurations
figure 4a
-----------------------------------------------------------------------------------------------------
figure 4c
figure 4b
inlet adapter/o-ring/bolts
outlet adapter/o-ring/bolts
90o outlet adapter/o-ring/bolts
pump with modular outlet
90o outlet adapter/o-ring/bolts
pump with modular outlet
modular filter adapter/o-rings/bolts
filter
The QM40 includes adapter plates, o-rings, and
bolts for use with threaded pipe.
Without the inlet adapter plate, the QM40 can
be bolted directly to the outlet of a GPI or GPro
pump featuring a modular outlet. Bolt modular
accessories to the outlet of the QM40 or use the
outlet adapter plate for threaded pipe.
Use a GPI modular filter adapter to include a
filter into your system.

6
CALIBRATION
The meter is accurately calibrated at the
factory for use with diesel fuel� Due to
differences in viscosity and ow rates,
the meter may require recalibration
to measure other fuels or to adjust
for inaccuracies� A gear replacement
kit is available (PN 139500-15, see
Illustrated Parts List section) to
convert the meter to unleaded fuels�
1� To adjust the calibration of the me-
ter, gain access to the calibration
screw by performing the
following: (see Figure
5a )
2� Remove the back plate and the
(4) screws retaining it� The O-ring
seal under the plate must not be
damaged�
3�Using the 5mm hex L-wrench
provided with the meter, adjust the
calibration screw as required�
4� Note: The calibration screw set-
ting may have been adjusted at
the factory� The gasoline setting
is approximately fully closed (turn
clockwise)� Do not overtighten the
screw against the seat�
figure
5a
5�Reinstall the plate, (4) screws
and the O-ring seal if removed�
Tighten (4) screws to 42-46 lb-in
[4�7-5�2 N•m] torque�
MAINTENANCE
The meter’s strainer should be cleaned
at regular intervals, especially if reduced
ow is encountered�
Clean or Replace Strainer
1� Remove the socket screws at the
inlet fitting� Remove the fitting, O-
ring and strainer� (see Figure 5
b )
figure 5
b
2. The strainer rim is pressed into the
housing inlet but can be removed
by carefully grasping the end with
pliers and pulling with a wiggling
motion until free�
3. Using a fine brush, clean the strainer�
Replace the strainer as necessary�
4�Wipe the housing inlet and re-
install the strainerby pressing it
into place with the end of a 1”
pipe nipple (or 1" electrical conduit
for QM40) or similar tube tool using
light hammer taps�
CAUTION
The mesh strainer must always be
installed when operating the meter;
otherwise, particles may enter the
meter chamber and disrupt the
operation of the oval gears�
5�Wipe the fitting and O-ring groove
clean�Coat the O-ring with oil or
light grease and seat into the
fitting groove�
6� Reinstall the inlet tting and screws�
Tighten screws to 42-46 lb-in
[4�7-5�2 N•m] torque�

7
TROUBLESHOOTING
Symptom Probable Cause Corrective Action
A�Meter counter does
not operate� (Normal
fuel ow)
Broken counter
assembly�
Replace counter�
Counter alignment Look for loose or
missing fasteners, bent
or misaligned parts�
Foreign material in
counter assembly�
Remove and clean
counter assembly�
Missing or worn bevel
gear�
Replace bevel gear�
B�Meter counter does
not operate�
(Little or no fuel ow)
Clogged strainer in
meter inlet�
Clean or replace
strainer
Jammed rotors from
foreign material in rotor
assembly�
Remove and clean rotor
assembly�
Other system
components
malfunctioning�
Check all system
components tank to
nozzle for clogs and/or
malfunctions� Repair as
necessary�
C�Fuel leakage�Leakage between
coverplate and housing�
Remove coverplate and
inspect for damaged,
missing or incorrectly
seated seal� Replace
as required�
Leakage at ttings Remove ttings and
inspect for damaged,
missing or incorrectly
seated seals� Replace
as required�
Leakage at threads�Remove meter and
reseal all threaded
connections with thread
tape or pipe thread
sealing compound
approved for use with
ammable liquids�

8
SPECIFICATIONS
Gallon Models Litre Models
Model
Designation
QM240N or QM40-G8N QM150N or QM40-L8N
Unit of Measure U�S� Gallon Litre
Flow Range 2 to 40 GPM 8 to 150 LPM
Typical Accuracy
(Factory Set)1
Diesel: ±0�5% (15-30 GPM/57-113 LPM)
±1�0% all other flowrates
Unleaded: +0�5% to -1�5% (15-30 GPM/57-113 LPM)
±2�0% all other flowrates
Typical Accuracy
(Field/Customer
Set)1
Diesel: ±0�25% at a given flow (15-30 GPM/57-113 LPM)
±0�5% all other given flows
Unleaded: ±0�5% at a given flow (2-23 GPM/8-87 LPM)
±0�5% at a given flow (23-40 GPM/87-150 LPM)2
Resolutional
Error (Display)
(0�01/Dispensed
Amount)*100
(0�1/Dispensed
Amount)*100
Operating
Temperature -20°F to 125°F -29°C to 52°C
Maximum Work-
ing Pressure 50 PSIG / 3�4 Bar
Wetted Materials:
Housing / Cover
/ Fittings Aluminum
Rotors PPS (Polyphenylene Sulde)
Shafts / Strainer Stainless Steel
Seals NBR (Nitrile Butadiene Rubber)
Mag-Drive Acetal, Stainless Steel and Neodymium (Nickel Plated)
Inlet/Outlet Ports 1" NPT (female) 1" NPT (female)
Pressure Drop
(at Max� Flow)
Diesel: 7�0 PSI / 0�5 Bar
Unleaded: 4�5 PSI / 0�3 Bar
Maximum
Batch Total 999�9 9999
Maximum
Cumulative Total 9,999,999�9 99,999,999
Technology Positive Displacement
1
Results may vary due to application variations�
2
Unleaded Fuel Kit required (Part No� 139500-15)
Note: Field Calibration is available on all models.

9
0 1 2 3 4 5 6 7 8
-1.5 -1.0 -0.5
0.0 0.5 1.0 1.5
0 5 10 15 20 25 30 35 40
PRESSURE DROP PSI
ERROR %
FLOWRATE GPM
QM240/QM40 ACCURACY & PRESSURE DROP vs FLOWRATE - DIESEL
FACTORY SETTING NOMINAL UPPER RANGE FACTORY SETTING NOMINAL LOWER RANGE
CALIBRATION SCREW IN CALIBRATION SCREW OUT 2 TURNS PRESSURE DROP

10
*A gear replacement kit is available (P/N 139500-15) to convert the meter to unleaded fuels. Replacement gear kit will adjust entire ow curve up 1.5%.
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
-1.5 -1.0 -0.5
0.0 0.5 1.0 1.5 2.0
0 5 10 15 20 25 30 35 40
PRESSURE DROP PSI
ERROR %
FLOWRATE GPM
QM240/QM40 ACCURACY & PRESSURE DROP vs FLOWRATE - UNLEADED
SCREW IN ORIGINAL EQUIPMENT SCREW IN WITH GEAR KIT SCREW OUT 2 TURNS WITH GEAR KIT PRESSURE DROP

11
NOTES:

12
D
E
KL
M
A
B
C
B
C
F
G
H
I
J
N
ILLUSTRATED PARTS LIST
K
For QM40

13
Kits and Accessories
ITEM PART NO. DESCRIPTION
A 139500-01 KIT, SEAL:
Includes (1) housing O-ring, (2) tting O-rings, (1) back plate O-ring
B 139500-02 KIT, FITTING, 1” NPT:
Includes (2) ttings, (2) tting O-rings, (1) strainer, attaching hardware
C 139500-03 KIT, FITTING, 1” BSPP:
Includes (2) ttings, (2) tting O-rings, (1) strainer, attaching hardware
F 139500-06 KIT, ROTOR:
Includes (1) rotor set
G 139500-07 KIT, COVERPLATE ASSEMBLY, GAL:
Includes (1) assembled coverplate (gears, mag drives), housing seal, at- taching hardware
H 139500-08 KIT, COVERPLATE ASSEMBLY, LITRE:
Includes (1) assembled coverplate (gears, mag drives), housing seal, at- taching hardware
ITEM PART NO. DESCRIPTION
I 139500-09 KIT, CALIBRATION SCREW:
Includes (1) calibration screw, (1) O- ring
J 139500-10 KIT, BACK PLATE:
Includes (1) back plate, (1) O-ring, at- taching hardware
N 139500-14 KIT, STRAINER:
Includes (1) strainer
- 139500-15 KIT, UNLEADED FUEL, QM240:
Not shown
K
165700-02 KIT, FITTINGS 1" NPT M30 or QM40

14
D
E
KL
M
A
B
C
B
C
F
G
H
I
J
N
ILLUSTRATED PARTS LIST

15
Kits and Accessories
ITEM PART NO. DESCRIPTION
D 139500-04 KIT, KNOB ASSEMBLY:
Includes (1) knob assembly
E 139500-05 KIT, COUNTER ASSEMBLY:
Includes (1) counter assembly, attach- ing hardware
K 139500-11 KIT, TOP COVER, GALLON:
Includes (1) top cover w/gallon decal, attaching hardware
L 139500-12 KIT, TOP COVER, LITRE:
Includes (1) top cover w/litre decal, attaching hardware
M 139500-13 KIT, MIDDLE COVER:
Includes (1) middle cover, attaching hardware
- 139500-15 KIT, UNLEADED FUEL, QM240:
Not shown

16
PARTS AND SERVICE
For warranty consideration, parts,
or other service information, contact
your local distributor� If you need
further assistance, please contact
GPI Customer Service Department
in Wichita, Kansas during normal
business hours at:
1-800-835-0113�
To obtain prompt, efficient service,
always be prepared with 1�) the model
number of your meter, 2�) the manufac-
turing date located on the back of the
meter, and 3�) specic information, as
necessary, obtained from the Illustrated
Parts List� For warranty work always be
prepared with proof of purchase date�
Please contact GPI before returning any
parts� It may be possible to diagnose
the trouble and identify needed parts
without returning parts� GPI can also
inform you of any special handling
requirements you will need to follow
covering the transportation and han-
dling of fuel transfer equipment� Before
packing for shipment, make sure the
meter is thoroughly drained and free
of fuel and vapors�
CAUTION
Do not return meters or parts
without specic authority from the
GPI Customer Service Department�
Due to strict regulations governing
shipment of ammable liquids,
meters may be refused and
returned to the sender if sent
without authorization�

04/2021921528-01 Rev. F
Limited Warranty Policy
Great Plains Industries, Inc. 5252 E. 36th Street North, Wichita, KS USA 67220-3205, hereby provides a limited
warranty against defects in material and workmanship on all products manufactured by Great Plains Industries,
Inc. This product includes a 5 year warranty from date of purchase as evidenced by the original sales
receipt. A 66 month warranty from product date of manufacture will apply in cases where the original sales
receipt is not available. Reference product labeling for the warranty expiration date based on 66 months
from date of manufacture. Manufacturer’s sole obligation under the foregoing warranties will be limited to
either, at Manufacturer’s option, replacing or repairing defective Goods (subject to limitations hereinafter
provided) or refunding the purchase price for such Goods theretofore paid by the Buyer, and Buyer’s
exclusive remedy for breach of any such warranties will be enforcement of such obligations of Manufacturer.
The warranty shall extend to the purchaser of this product and to any person to whom such product is
transferred during the warranty period.
This warranty shall not apply if:
A. theproducthasbeenalteredormodiedoutsidethewarrantor’sdulyappointedrepresentative;
B. the product has been subjected to neglect, misuse, abuse or damage or has been installed or
operated other than in accordance with the manufacturer’s operating instructions.
To make a claim against this warranty, contact the GPI Customer Service Department at 316-686-7361 or
800-835-0113. Or by mail at:
Great Plains Industries, Inc.
5252 E. 36th St. North
Wichita, KS, USA 67220-3205
GPI will step you through a product troubleshooting process to determine appropriate corrective actions.
GREAT PLAINS INDUSTRIES, INC., EXCLUDES LIABILITY UNDER THIS WARRANTY FOR DIRECT, IN-
DIRECT, INCIDENTAL AND CONSEQUENTIAL DAMAGES INCURRED IN THE USE OR LOSS OF USE OF
THE PRODUCT WARRANTED HEREUNDER.
Thecompanyherewithexpresslydisclaimsanywarrantyofmerchantabilityortnessforanyparticularpurpose
other than for which it was designed.
ThiswarrantygivesyouspecicrightsandyoumayalsohaveotherrightswhichvaryfromU.S.statetoU.S.state.
Note: In compliance with MAGNUSON MOSS CONSUMER WARRANTY ACT – Part 702 (governs the resale
availability of the warranty terms).
© 2019 GREAT PLAINS INDUSTRIES, INC. All Rights Reserved.
FLOMEC and GPRO are registered trademarks of Great Plains Industries, Inc.