Omega FPDM1000 User Manual

FPDM1000 SERIES

Positive Displacement

Mechanical Flowmeters

To the owner:

Thank you for purchasing an OMEGA
FPDM Series Flowmeter. Please take a few
minutes to read through the manual before
installing and operating your meter. If you
have any problems with the meter, refer to
the Maintenance and Troubleshooting sec­tions of the manual.

This manual contains connection and op­erating instructions for the OMEGA FPDM
Series meters with mechanical displays.
This includes the following models:

FPDM1004 FPDM1006
FPDM1005 FPDM1007

The OMEGA FPDM Series Flowmeter has
incorporated the oval rotor principal into
its design. This has proven to be a reliable
and highly accurate method of measuring
flow. Exceptional repeatability and high ac­curacy over a wide range of fluid viscosi­ties and flowrates are features of the
OMEGA FPDM Series Flowmeter design.
The low pressure drop and high pressure
rating means the OMEGA FPDM Series
Flowmeter is suitable for both gravity and
pump (in-line) applications.

The OMEGA FPDM Series Flowmeters are
available in either Aluminum or 316 Stain­less Steel. Standard rotors are made from
PPS.

The OMEGA FPDM Series mechanical dis­plays have a resettable batch totalizer and
non-resettable accumulative totalizer.

IMPORTANT INFORMATION

Please read this information

!

carefully before use!

▲

Before use, confirm the fluid to be used is
compatible with the meter or consult with
OMEGA for advice.

To prevent damage from dirt or foreign
matter, OMEGA recommends a Y or bas­ket type 60 mesh strainer be installed as
close as possible to the inlet side of the
meter. (If required, contact OMEGA for fur­ther information.)

NOTE: When a strainer is installed it should

be regularly inspected and cleaned.
Failure to keep the strainer clean will
dramatically effect flowmeter perfor­mance.

To prevent damage to the meter, slowly fill
the system with fluid. This will prevent dam­age caused by air purge.

NOTE: Failure to do this could damage the

meter.

For pump applications, turn off the pump
at the end of each day.

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INSTALLATION

1. OMEGA recommends that when set­ting up pipework for meter installations,
a bypass line be included in the de­sign. This provides the facility for a
meter to be removed for maintenance
without interrupting production. (See
Figure 1)

Figure 1

Bypass Line

Flow Inlet

Figure 2

➧

R I G H T

➧

R I G H T

Strainer

Flow Outlet

2. Use thread sealant on all pipe threads.

3. For pump applications, ensure pipe
work has the appropriate working pres­sure rating to match the pressure out­put of the pump.

4. Install a wire mesh strainer (Y or bas­ket type 60 mesh) as close as possible
to the inlet side of the meter.

5. Ensure that the meter is installed so
that the flow of the liquid is in the di­rection of the arrows embossed on the
meter body.

6. The meter can be installed in any ori­entation as long as the meter shafts are
in a horizontal plane. (See Figure 2) The
register assembly may be oriented to
suit the individual installation.

W R O N G

NOTE: Incorrect installation can cause pre-

mature wear of meter components

7. Do not overtighten meter connections.

8. It is important that after initial installa­tion you fill the line slowly, high speed
air purge could cause damage to the
rotors.

9. Test the system for leaks.

10. Check the strainer for swarf or foreign
material. After the first 200 litres, check
periodically – particularly if the flowrate
decreases.

➧

2

OPERATION SERVICE INSTRUCTIONS

When fluid passes through the meter, the
rotors turn. The gear located on top of one
of the rotors drives the mechanical regis­ters gear train which provides an accurate
readout.

Disassembly:

Ensure that the fluid supply to the meter is
disconnected, and the line pressure is re­leased before disassembly. Refer to the
exploded parts diagram on page 6.

1. Remove the four screws located on the
face of the register. Then remove the
faceplate cover including register as­sembly.

2. Remove the four register mounting
screws. Then remove the lower half of
the register housing.

3. Remove the six coverplate screws and
remove the coverplate.

4. Remove the four meter cap screws and
remove the meter cap.

5. Remove rotors.

Reassembly:

1. Clean all components before reassem­bly.

2. Before reassembly, check the condition
of the rotors. Replace if necessary.

3. Replace the rotor (with the gear) on the
short shaft in the housing. Then place
the second rotor onto the shaft so as
the rotors are at 90 degrees to each
other. (See Figure 3)

Figure 3

Rotor #1

Rotor #2

Rotors must be at 90° to each other

3

Check rotor operation by turning either
of the rotors. If the rotors are not in mesh
correctly or do not move freely, remove
one of the rotors and replace it correctly
at 90 degrees to the other rotor. Recheck
the operation of the rotors.

4. Inspect the gears in the meter cap for
wear. Replace if required - refer to spare
parts on page 6.

5. Replace the O-ring into the groove in
the meter cap. If the O-ring has been
distorted or is damaged in any way, re­place it with a new part.

6. Replace the meter cap. Make sure the
meter cap and the gear on the rotor
meshes correctly with the gear in the
meter cap. Insert the allen screws and
tighten in the sequence 1, 4, 2 and 3.

7. Inspect the bevel gear, O-ring and out­put gear for wear or damage. Replace
faulty components if necessary.

8. Replace the output shaft, bush and seal.
Disassembly of output shaft:

a. Remove the bevel gear.
b. Remove the circlip and push out the

output shaft assembly, including the

washer.
c. Remove the seal.
d. Carefully press out the output shaft

bush (if required).
Assembly of output shaft:

a. Carefully press the new output shaft

bush into place. (Use Loctite Primer

7471, as per instructions, followed

by sealant Loctite 262.)
b. Insert a new seal into the groove of

the output shaft bush.
c. Replace the output gear and washer

and replace the circlip to lock the

output gear shaft into place.
d. Replace the bevel gear and tighten

the grub screw onto the flat face of

the shaft.

9. Place the O-ring into the groove in the
meter cap. Replace the O-ring seal if
required.

10. Place the coverplate onto the meter.
Replace the coverplate screws and
tighten the six cap head screws firmly.

11. Place the lower coverplate of the regis­ter into position. Replace the four screws
and tighten.

12. Position the register correctly on top of
the lower register cover. Replace the four
screws and tighten.

13. Test the meter by turning the rotors with
a finger or by applying low air pressure
(no more than a good breath) to one end
of the meter, before returning meter to
the line.

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