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POSITIVE DISPLACEMENT FLOWMETERS
FTB3001
U Patented Toothless
Oval Gear Design
U High Accuracy
U Compact Design
U High-Resolution
Electronic Output
U Temperatures to
176°C (350°F)
U Pressure Rated to 3000 psig
U Multiple Bearing Options
U 316 Stainless Steel
Construction
U No Special Gears Needed
for High Viscosity
U Linearity Unaffected by
Viscosity Changes
U 1 MNPT End Fitting
U 150 or 300# Flange
Fittings Available
The oval-shaped smooth gears
in the FTB-3000 Series are used
to displace a precise volume of
fluid, which is passed through the
measurement chamber during each
revolution. The toothless design,
working with the fluid being measured,
provides a complete viscous seal
within the measuring chamber. This
sealing effect provides for greater
flow measurement accuracy.
The displacement of the fluid is
translated via a magnetic or Hall
effect pick-up into a pulse output that
is proportional to the flow.
The unique design of the
FTB-3000 oval gear meter
incorporates two smooth (toothless)
oval gears positioned 90 degrees
out of phase. The measurement
gears are held together by two
timing gears. The standard meter
contains no seal between the
measurement chamber and the
timing chamber. The timing gears
have a pitch diameter equal
to the outside diameter of the
measurement gears. The flow
through the meter measurement
chamber follows the path of least
resistance. Therefore, no liquid
passes through the center cavity
between the measurement gears.
The fluid is displaced from the inlet
to the outlet via the area between
the smooth oval gear and the inner
diameter of the meter housing.
Conventional oval gears have teeth
that mesh. One of the advantages
of smooth oval gears is that the
viscous flow does not get trapped
or squeezed between the gears.
Typically, oval gears need to have
cuts made in the teeth to allow high
viscosity fluids to pass. These cuts
result in a decrease in accuracy.
Model No. Flow Rate Sensor
FTB3001 2 to 25 GPM Magnetic pick-up
FTB3002
Accessories
Model No. Description
U24Y101 24 Vdc power supply
Comes complete with operator’s manual and 10-point NIST calibration certificate.
To order with flange fittings, consult Flow Engineering.
Ordering Examples: FTB3002, hall effect sensor.
FTB3001, magnetic pick-up sensor.
FTB3002 shown
smaller than actual size.
To Order
0.02 to 25 GPM
Toothless Gears
As shown below, the oval-shaped
toothless gears sweep out a
precisely known volume of fluid
passing through the measurement
chamber during each rotation.
Hall effect, 6 to 24 Vdc
F-83
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FOR HIGH VISCOSITY FLUIDS
151.6
(5.97)
Depending on
Coil Selectd
112.5
(4.43)
177
(7.00)
120.6
(4.75)
1 MNPT
END FITTING
BOTH ENDS
Flowrate (GPM)
850
848
846
844
842
840
838
836
834
832
830
K-Factor (PPG)
11 10 98 76 54321
0.02
1 258
11 14 17 20 23 25
844.00 845.00 846.32 843.56 845.74 845.13 845.44 845.76 845.66 844.98 844.89
845.55
845.40
845.54
845.05
846.44
846.71
845.43
845.81
845.00
846.00
846.00
846.20
Flowrate
100 cstk
150 cstk
200 cstk
FTB-3000 K Curve
GREATER THAN 100 CENTISTOKES
Test Results from Independent Lab
FTB3000 P vs. Flowrate
80.0
Pressure Drop: DP=Rate* (1.15 + (0.0017) *Viscosity)
70.0
Rate = GPM
60.0
50.0
P
40.0
30.0
20.0
10.0
Viscosity = Centistokes
0.0
258111417
SPECIFICATIONS
Service Fluid: Clean liquids,
maximum particle size 3.175 mm (0.125")
Accuracy: ±0.25% of reading
Viscosity: 100 cSt or greater
Repeatability: ±0.05%
Operating Temperature:
FTB3001: -240 to 176°C (-400 to 350°F)
FTB3002: -40 to 150°C (-40 to 302°F)
Operating Pressure: 3000 psig standard
Wetted Parts: 316 SS body and
gears with PEEK
TM
gear seats
Bearings: Shielded, self-lubricating
440 SS ball bearings
Connections: 1 MNPT
Pick Up Coil: Magnetic type or
Hall Effect (6 to 24 Vdc power)
Calibration: Ten-point calibration
traceable to NIST @ 100 centistokes
Weight: 7.53 kg (16.6 lb)
Flowrate (GPM)
100 cstk 500 cstk 1000 cstk
F-84
20
23 25
F
Dimensions: mm (inch)
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