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 |
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.
Figure 2
R I G H T
R I G H T
W R O N G
NOTE: Incorrect installation can cause premature 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
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.
SERVICE INSTRUCTIONS
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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