FLOMEC
Insertion Paddle Wheel
Flow Meter / Monitor
For Low Viscosity Liquids
FLOMEC
Introduction
Insertion Paddle Wheel Flow
Meter / Monitor
Operating principle
Flow passes through a pipe causing the rotor
to spin. Magnets installed in the rotor pass by
pulse sensors within the transducer body &
inturn this produces frequency outputs
proportional to flow rate.
Cost effective.
Simple means of measuring the flow.
Wide range of low viscosity liquids.
Flomec
Robust Features
Insertion Paddle Wheel Flow
Meter / Monitor
 Durable PVDF or PEEK rotor.
 Graphite - PTFE impregnated peek
bearing.
 Precision ground stainless rotor shaft.
 316 stainless steel body.
Flomec

Paddle Wheel Features
All stainless steel construction
 Dual independent pulse outputs
 Direct input to PLC and Computer
 High pressure submersible design
 Pipe sizes 1.5” to 100” (40-2500mm)
 Electrical interference immunity
 Minimal pressure loss
 Simple to install
 Low installed cost
 European CE compliant.
Flomec
 High
Paddle Wheel Options
temperature to 4000F (2000C)
 Reed switch option for hazardous
area operation (intrinsically safe)
 Integral or remote high speed
preset batch controller
 Optional Bi-directional discriminator
output
Non magnetic rotor option for
liquids containing ferrous
suspensions.
Flomec
Innovative Design
The metering head of the
Paddle Wheel is shaped to
encourage a conditioned flow
profile at the aerofoil shaped
rotor.
The combination of these unique
features extends the linear
measuring range to cover flow
velocities from 1.0 - 33 ft/sec
(0.3 - 10 metres/sec), without
creating flow cavitation.
Paddle Wheel Flow Conditioning at Metering
Head
Flomec
Paddle Wheel Outputs
 Standard, two independent pulse
outputs
 Suitable for direct input to a wide
range of ancillary instruments,
Z3 Totalizer, PLC's and
computers.
 Both pulse outputs are rotor
magnet activated.
 High level of immunity to
electrical interference
experienced with most other
transducers of this kind.
Flomec
Outputs
High Level Voltage Pulse - A self generating pulse output requiring no
power source, produces a strong 1.5 volt output spike of approx.
10 micro seconds duration with no dependence on rotor speed.
Square Wave Output - An open collector pulse output produced by a solid
state Hall Effect device. This three wire device requires 5-24VDC
excitation voltage and produces a high resolution NPN square wave
conditioned output.
Flomec
Installation
General Arrangement
Standard Installation
ALIGNMENT
SLOT TO
PARRALLEL
PIPE
Examples of insertion depth D :
LOCK
Z3 Rate Totaliser
D
For 40mm pipe ID
For 50mm pipe ID
For 100mm pipe ID
For 400mm pipe ID
( D= 5.0 mm )
( D= 6.25 mm )
( D= 12.5 mm )
( D= 50.0 mm )
Installation
Flomec
Hot Tap Installation
DOR Paddle Wheel
2" ball or gate
isolation valve.
Installation
Flomec
Major obstructions such as
pumps, valves, reducers or
strainers to be kept well outside
the straight run pipe sections
Installation Straight Piping Requirements
10 pipe dia. minimum
25 pipe dia. prefered
5 pipe dia. min.
10 pipe dia. prefered
FLOW
10 o’clock
12 o’clock
2 o’clock
Orientation
Other positions around
the pipe are acceptable
Mount on either the 2, 10 or 12 o’clock
positions of the pipe. If there is any
likelihood of air entrainment in a horizontal
pipe do not locate the flow transducer in the
12 o’clock position.
Flomec
Fluid Flow in Pipes
Factors which affect the flow
of a fluid in a pipe include:- Velocity of the the fluid
(mean velocity)
- Viscosity of the fluid
- Density of the fluid
- Diameter of the pipe
- Pipe friction where the fluid
is in contact with the pipe.
Fig. 1 Ideal fluid velocity profile
If we ignore the effects of viscosity and the pipe friction, a fluid would
travel through a pipe in a uniform velocity across the diameter of the
pipe. The 'velocity profile' would appear as in Fig 1.
Flomec
Fluid Flow in Pipes
However, this is very much an 'ideal' case and, in practice, viscosity
effects the flow rate of the fluid and works together with the pipe friction
to further decrease the flow rate of the fluid near the pipe wall. This can
be represented in Fig 2.
The most important of the
factors effecting fluid flow in
pipes can be pulled together
in one dimensionless quantity
to express the characteristics
of flow. This is known as the
Reynolds Number.
Fig. 2 Real fluid velocity profile
Fluid Flow in Pipes
At very low velocities, the dynamic force will be low and, therefore, the Reynolds
Number will be small. Similarly, a high viscosity fluid will result in low Reynolds
Number. This will result in viscous forces holding back the fluid flow at the pipe
walls with the highest fluid velocity at the centre of the pipe. This is similar to Fig
2. Except that the velocity profile is a parabola (see Fig 3.). It is known as
laminar flow and normally occurs at Reynolds Numbers below 2000.
Fig. 3 Laminar Flow
Flomec
Fluid Flow in Pipes
When Reynolds Numbers are
above 2000 i.e. high velocities
and/or low viscosities, the flow
breaks up and Turbulent flow
occurs with a much flatter
velocity profile (see Fig. 4).
Fig. 4 Turbulent flow velocity profile
In the process world, unless very viscous fluids are being piped,
turbulent flow is the norm. This is certainly the case for steam where
Reynolds numbers well in excess of 2000 are encountered.
Flomec
Flomec
Installation Guidelines
Flomec
Applications
Wide Application
Typical industry applications include:
HVAC
- Hot and chilled water, Fire systems
and Thermal energy monitoring.
Municipal - Water distribution, Water management
and Water treatment.
Irrigation - Water management.
Water treatment - Chlorination, Desalination and
mechanical filtration plants, Chemical injection systems.
Refineries - Primary flow additive injection, Fire and cooling systems.
Power Generation - Boiler feed water, Steam condensate, Process water
and water balancing.
Chemical - Process and cooling tower water, Chemical and water batching.
Others - Cement Mfg, Diesel fuel transferring, Flow testing, Fire truck
and Hydrant flow monitoring, Food processing, Pulp/paper, Mining.
Flomec
Model Prefix
Suit Pipe Sizes
Process
Connections
Specifications
DP-490
DP-525
40 - 900 mm (11/2" - 36")
50 - 2500 mm (2" - 100")
R11/2" Male or 11/2" NPT male
R2" Male or 2" NPT male
Body & O-ring
Material
316L stainless steel body & rotor shaft, FPM O-rings
Rotor Material
PVDF ( 100 deg C ) or PEEK ( 200 deg C )
Velocity Range
Flow Range
Linearity &
Repeatability
Maximum Pressure
0.3 - 10 metres / sec.
(1.0 - 33 ft / sec.)
0.25 - 6300 litres / sec.
(4 - 99600 USGPM)
Linearity typically +1.5%, Repeatability +1%, with well established flow profile
80 bar (1200 PSI)
Flomec
Specifications
DP-490
Model Prefix
DP-525
Temperature
Ranges
Standard -40C0 to 1000 C (-400 to 2120 F) plus option to 2000 C (4000 F)
Outputs (standard)
 Voltage Pulse self generated 1.5V x 10s (2 wire) 200 - 240hz max.
 Open Collector NPN 5 - 24VDC square wave (3 wire) 200 - 240hz max.
transmission to 1000m
(3300 ft) max.
Outputs (optional)
Conduit Entry
Cable
 Reed Switch (2 wire) 66 - 80hz max. [can be used as I.S. with barrier]
 Non magnetic rotor + Hall Effect output (for liquids with ferrous impurities)
 High temperature voltage pulse output to 2000 C (4000 F)
 Quadrature output (dual Hall Effect output with 900 phase shift).
3
/8" NPT or PG9 conduit thread (M16 x 1.5 on terminal box option)
3 metres (10ft) screened 5 core as standard, longer lengths are optional.
Mounting
Requirements
Shipping Weights
BSP / NPT service saddle
1.3 kg (3lbs)
1.5 kg (3.3lbs)
Ordering Information
Flomec
Insertion Paddle Wheel DP-490 / DP-525
DP-490
40-900mm pipes (1.5" - 36") - 1 1/2" BSP/NPT process connections.
DP-525
50-2500mm pipes (2" - 100") hot-tap version - 2" BSP/NPT process connections.
Body Material
316 stainless steel.
Rotor Material
2 =PVDF / St. St. ( max 100 deg C )
4 =Peek / St. St. ( max 200 deg C )
X =Special ( on request )
Sealing Material
F
N
P
E
Mechanical
Connection
DP-490
R8 = R1 ½” male
R9 = R2 male
N8 = 1 ½” NPT male
N9 = 1000C (1850F – standard )
= FPM ( standard )
= NBR
= PTFE ( encapsulated FPM )
= EPR ( for Ketones only )
DP-520
R9 = BSPT male
N9 = 2” NPT male
Flomec
Ordering Information
Insertion Paddle Wheel DP-490 / DP-525
Output / Electrical
Connections
*Denotes only possible
with PEEK rotor
Order Example: DOR-52 4 F R9 H5 00
F1 = NPN OC + 1.5V – pulse + 3 m cable ( standard )
F2 = NPN OC + 1.5V – pulse + 10 m cable
F3 = NPN OC + 1.5V – pulse + 20 m cable
F4 = NPN OC + 1.5V – pulse + 50 m cable
F5 = NPN OC + 1.5V – pulse + terminal box on stem kit
F6 = NPN OC + 1.5V – integral electronic ZOD on stem kit
N5*= NPN OC + terminal box on stem kit + high temp. sensor
N6*= NPN OC + integral electronic ZOD on stem kit + high temp. sensor
R1 = Reed switch + 3 m cable
R2 = Reed switch + 10 m cable
R3 = Reed switch + 20 m cable
R4 = Reed switch + 50 m cable
R5 = Reed switch + terminal box on stem kit
Q1 = 2 x NPN OC + 3 m cable
Q2 = 2 x NPN OC + 10 m cable
Q3 = 2 x NPN OC + 20 m cable
Q4 = 2 x NPN OC + 50 m cable
Q5 = 2 x NPN OC + terminal box on stem kit
E1 = Non magnetic rotor for ferrous media, NPN, 3 m cable
E2 = Non magnetic rotor for ferrous media, NPN, 10m cable
E3 = Non magnetic rotor for ferrous media, NPN, 20m cable
E4 = Non magnetic rotor for ferrous media, NPN, 50m cable
T5*= Non magnetic rotor for ferrous media, ind. Coil, terminal box on stem kit
H5*= High temp. inductictive coil, terminal box on stem kit, + 200 deg.C
XX = Special option ( specified in clear text, consult factory )
Flomec
Ordering Information
Paddle Wheel Meter DP-490 / DP-525 - cont’d
Electronics
-00 = Frequency output only 3 metres cable - standard
Only for output F6 & N6
Z1 = Electronic ZOD-Z1
Z3 = Electronic ZOD-Z3
Z5 = Electronic ZOD-Z5
B1 = Electronic ZOD-B1
XX = Special option ( specified in clear text )
Special options
None = Without options
Y = Special option (specified in clear text )
Flomec
Options
Paddle Wheel Rate / Totalisation
Options
The FRT12 Series of Flow Rate Totalisers are
field mount or remote instruments for accurate
flow rate indication and totalisation of flow.
The self powered FRT12 interfaces direct to
the Paddle Wheel without the need for external
power. Alternatively it can be loop powered via
an optional 4-20mA output.
The instrument is housed in a robust plastic
enclosure that is completely watertight to IP67
(Nema 4X) classifications.
Programming is done via the front keypad
including flow K-factors, Engineering unit
selection, 4-20 mA analog Output Spans,
High and Low Flow Alarms & linearisation.