Page 1
Magnetic
Pick-Up
Meter Body
Retaining Ring
Inlet Flow
Straightener
Conduit
Adapter
Retaining
Ring
Outlet Flow
Straightener
Turbine Assembly
ECONOMICAL LIQUID
TURBINE FLOWMETERS
FTB-1400 Series
Standard
U Cost-Effective Solution
for Turbine Flowmeter
Applications
U Rugged 316 Stainless Steel
Construction Offers Long
Service Life in Severe
Operating Environments
U Accurate and Repeatable
Flow Measurement
U Installation in Pipe Sizes
U NIST Calibration
The OMEGA® FTB-1400 turbine flowmeter is
designed to meet the demands of the most rigorous
flow measurement applications. Originally developed
for the secondary oil recovery market, the FTB-1400
is an ideal meter for liquid flow measurement on or
off the oilfield. The meter features a 316 Stainless
Steel housing and rotor support, CD4MCU Stainless
Steel rotor, and abrasion-resistant tungsten carbide
rotor shaft and journal bearings. These materials help
the meter to maintain accuracy and mechanical
integrity when measuring the corrosive and abrasive
fluids found in many industries.
Fluid entering the meter first passes through an inlet
flow straightener that reduces its turbulent flow
pattern. Fluid then passes through the turbine,
causing the turbine to rotate at a speed proportional
to fluid velocity. As each turbine blade passes through
the magnetic field generated by the meters magnetic
pick-up, an AC voltage pulse is generated. These
pulses provide an output frequency that is proportional
to volumetric flow.
from
1
⁄2 to 2"
Rotor and
Rotor Shaft
*Upstream
Rotor Support
*Retaining
Ring
*Thrust
Ball
Note: * Indicates Parts Contained in Repair Kits
50
Pressure Drop vs. Flow Rate
FTB-1425, shown
smaller than actual size.
Magnetic
Pick-up
Conduit
Adaptor
Meter Body
Retaining
Ring
Groove
Retainer
Pins
*Downstream
Rotor Support
*Bearing
SPECIFICATIONS
Accuracy: ±1% of reading for 1" and larger, ±1% of
reading over the upper 70% of the measuring range
1
⁄2" meters
for
Repeatability: ±0.1%
Magnetic Pickup: 30 mV/P-P
Materials of Construction
Body: 316 Stainless Steel
Rotor: CD4MCU Stainless Steel
Rotor Support: 316 Stainless Steel
Rotor Shaft: Tungsten carbide
Turndown Ratio: 10:1
Calibration: Water (NIST traceable calibration)
Pressure Rating: 5000 psi (maximum)
Turbine Temperature: -101 to 177°C (-150 to 350°F);
-101 to 232°C (-150 to 450°F) (with “-HT” option)
End Connections: NPT, BSPP optional
10
3/4"
3/8"
1/2"
7/8"
1"
1-1/2"
2"
3"
4"
6"
10"
8"
1
PSID Pressure Drop
.1
1 10 100 1,000 8,000
(34) (343) (3429) (34,286) (274,286)
Flow Rate GPM (BPD)
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Page 2
Typical K-Factor Curve (Pulses per Gallon)
K-Factor
The K-Factor represents the number of output pulses
transmitted per gallon of fluid passing through the
turbine meter. Each turbine has a unique K-Factor.
Typical K-Factor Curve (Pulses Per Gallon)
+1%
+%
However, turbine meters are not functionally consistent
throughout the full flow range of the meter.
There are several forms of “friction” inherent in turbine
meters that retard the rotational movement of the turbine
rotor. These frictional forces include: magnetic drag,
created by electromagnetic force of pickup transducers;
mechanical drag, due to bearing friction; and viscous
drag, produced by flowing fluid. See charts on right.
LINEARITY (DESIGN DEVIATION)
-1%
-%
K
AVG. K-FACTOR (K)
1" AND LARGER TURNDOWN APPROX. 10:1
½" TURNDOWN APPROX. 3:1
-
F
A
C
T
O
)
R
(
P
U
L
S
N
O
L
L
A
G
/
E
S
As flow increases, the frictional forces are minimized
and the free-wheeling motion of the turbine rotor
becomes more linear (proportional to flow). The
K-Factor becomes relatively constant and linear
100%
K-FACTOR (PULSES/GALLON)
throughout the balance of the linear flow range.
This is approximately a 10:1 turndown ratio from the
maximum flow rate down to the minimum flow rate.
K-FACTOR (CYCLES/GALLON)
50%
P
O
% OF VALUE AT FLOW RATE
OUTPUT FREQUENCY (CYCLES/SEC)
0% 10% 50% 100%
R
P
FULL FLOW RANGE
LINEAR FLOW RANGE
R
D
E
R
U
S
S
E
To Order Visit omega.com/ftb1400_series for Pricing and Details
Range
Connection K-Factor Lay Length
Model No. MNPT LPM GPM Barrels/Day Pul/Gal mm (inch)
FTB-1411 ¹⁄₂ 2.3 to 11.3 0.6 to 3 20 to 100 18,000 76 (3)
FTB-1412 ¹⁄₂ 2.8 to 28 0.75 to 7.5 25 to 250 13,000 76 (3)
FTB-1413 ¹⁄₂ 7.6 to 56.7 2 to 15 68 to 515 3300 76 (3)
FTB-1421 1 2.3 to 11.3 0.6 to 3 20 to 100 18,000 76 (3)
FTB-1422 1 2.8 to 28 0.75 to 7.5 25 to 250 13,000 76 (3)
FTB-1423 1 7.6 to 56.7 2 to 15 68 to 515 3300 76 (3)
FTB-1424 1 11.3 to 113 3 to 30 100 to 1000 3100 101 (4)
FTB-1425 1 18.9 to 189 5 to 50 170 to 1700 870 101 (4)
FTB-1431 1¹⁄₂ 56.8 to 681 15 to 180 515 to 6000 330 152 (6)
FTB-1441 2 56.8 to 681 15 to 180 515 to 6000 330 152 (6)
F
Accessories
Model No. Description
FTB-1400-CABLE 3 m (10') cable assembly with 2-pin connector (required for remote display)
FTB-1400-90CABLE 3 m (10') cable assembly with 2-pin 90º connector (required for remote display)
FTB-1400-MP Replacement standard magnetic pick-up
FTB-1400-MD Battery powered basic meter mount display
FTB-1400-MD-A Battery powered advanced meter mount display
FTB-1400-RD Battery powered basic remote mount display
FTB-1400-RD-A Battery powered advanced remote mount display
FTB-1400-SD Battery powered basic swivel mount display
FTB-1400-SD-A Battery powered advanced swivel mount display
Comes complete with operator’s manual and 5 point NIST calibration certificate for water. Cable with connector sold separately.
Cable/connector are required for operation.
For units with high temp magnetic pulse output, add suffix “-HT” to model number, consult Flow Engineering for price
(not available on “-AMP” models).
For units with amplified pulse output, add suffix “-AMP” to model number consult Flow Engineering for price (not available on “-HT” models).
For units with BSPP threads, add suffix “BSP” to model number for additional cost.
Ordering Examples: FTB-1424, 1 NPT stainless turbine and FTB-1400-MD, battery powered basic meter mount.
FTB-1411, ½ NPT stainless turbine and DPF701, digital panel meter for rate of total display, FTB-1400-CABLE, 3 m (10') cable assembly with
2-pin connector. For details on DPF701 meter, visit omega.com/dpf700 for details.
F-50
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