turbine wheel flow meter / monitor
DESCRIPTION
FLOMEC. Turbine Wheel Flow Meter / Monitor. For Low Viscosity Liquids. Flomec. Description. Turbine Wheel Flow Meter / Monitor The TP turbine wheel flow meter is highly accurate, reliable & used to measure the flow of clean low viscosity fluids & utilizes a proven flow meter technology. - PowerPoint PPT PresentationTRANSCRIPT
Turbine WheelFlow Meter / Monitor
FLOMEC
For Low Viscosity Liquids
Turbine Wheel Flow Meter / Monitor
The TP turbine wheel flow meter is highly accurate, reliable & used to measure the flow of clean low viscosity fluids & utilizes a proven flow meter technology.
The turbines design is based on a freely suspended turbine rotor which is rotated by the flow of fluid through the meter body
DescriptionFlomec
Turbine Wheel Flow Meter / Monitor
OperationFlomec
Circlip
Bearing supportsRotor shaft
& rotor
Fig. 1
Principal of operation
The TP Turbine Wheel flow meter consists of a helically shaped turbine rotor supported in two tungsten carbide bearings, the rotor being solid ferritic stainless steel of a grade compatible with the metered liquid, is all contained within a housing of non-magnetic stainless steel. (fig.1).
OperationFlomec
A pick off coil having a permanent magnet core is mounted in the housing adjacent to the rotor blade tips such that a magnetic circuit is set up via the rotor blades (fig.2).
Rotation of the rotor varies the reluctance of this Pick off coil magnetic circuit and the flux changes induce a small voltage in the coil, the frequency of which is directly proportional to the rotor speed andtherefore proportional to the volumetric flow rate.
Fig 2
Principal of OperationPick - Off coil
Rotor Blades
Stainless steel body Tungsten carbide shaft & bearings Frequency output
Pressures to 250 bar
Pipe sizes 1/2” to 6” (15-150mm)
+/- 0.5% linearity ( 10:1 turndown )
Minimal pressure loss
Simple to install
Temperature 120 deg C standard
European CE compliant.
Flanged or Screwed
Turbine Wheel FeaturesFlomec
High temperature to 2400 C
+/- 0.15% linearity.
2 pick off coils – 90 deg. offset
Integral or remote high speed
preset batch controller
Integral or remote self powered flow
rate totaliser with scaled pulse, 4-20 mA
and flow alarm outputs.
Optional Bi-directional discriminator
output.
Turbine Wheel OptionsFlomec
RATE
TOTAL
ACCUM
TOTAL ^RESET
>PROGRAM
ENTER
galRUN ACCUM. TOTAL STOP BAT LOW HIGH
Frequency output - 2 wire reluctance pick off coil. ( 40mV P/P at minimum flow rate )
Suitable for direct input to a wide range of ancillary instruments.
Polarity insensitive - 20 meters transmission distance standard.
IP66 / 67 protection class.
Turbine Wheel OutputsFlomec
Turbine Wheel OutputsFlomec
coil output
with
junction box
screen earthed
at junction box
& connect to -0V
at receiving instrument
coil output
with MS connector
( A & B )
screenuse twisted
pair
twisted pairPick-off coilscreen
Receiving instrument
Because of the low strength of the standard coil mV output it is important to protect the transmitted signal from any form of electrical interference such as AC line frequencies. A twin core ( twisted pair ) screened multi-strand signal cable should be used for connection to the pick-off coil, recommended cable size being 16/0.2 x 0.5mm² ( 16/0.0078 ). The screen needs to be connected at -0V at receiving instrument
Electrical Connections
Kobold Turbine Wheel OutputsFlomec
coil output
with MS connector
( A & B )
screenuse twisted
pair
twisted pairPick-off coil
screen
RATE
TOTAL
ACCUM
TOTAL ^RESET
>PROGRAM
ENTER
galRUN ACCUM. TOTAL STOP BAT LOW HIGH Cable runs for non amplified outputs
should be limited to 20 metres (65 feet) maximum and should be kept well away from high energy power supplies and electricals such as motor speed controllers, transformers and solenoids. Preferably run the cable in a separate conduit to any other wiring.
Longer cable runs would require an amplifier at the flow meter
20 meters max.
Electrical Connections
Turbine Wheel OutputsFlomec
Amplified current pulse output with MS connector.
Receiving instrument
+ 9~24Vdc
( - )
ShieldPreamplifier coil ( optional )
An amplified output can be provided by fitting a pre-amplified coil. The pre-amplifier coil amplifies the low level signal from the integral magnetic pick-off providing a current pulsed output suitable for transmission over long distances or through noisy electrical environments. The output is a current pulse in the order ..of 4mA (off) and 20mA (on)
InstallationFlomec
Meter orientationThe meter may be installed in horizontal or vertical pipes, with vertical pipes it is preferred to have the flow passing upward so that any entrained air bubbles will pass quickly. Ensure that the arrow on the meter body is in line with the direction of flow.
min. 10 pipe diameters
min. 5 pipe diameters
Fig. 2
Flow conditioning
All turbine flow meters should be installed with a minimum of ten diameters of straight pipe up-stream and five diameters down-stream (fig. 2), except where the flow meter is installed directly after a valve or centrifugal pump when the minimum straight up-stream length should be increased to 20 diameters.
InstallationFlomec
Bends & elbows up-stream of the flow meter should have a minimum inside radius of twice the diameter of the pipe. Ensure flange gaskets are bore size matched with meter.
Flow Conditioning
22~30º
Fig 3Reducers where necessary should be of the concentric type with an included angle of 22~30 degrees (fig. 3)
Inlet pipe bore should be matched as closely as possible to that of the meter, but where it is not possible to select the exact inside diameter, a smaller inlet diameter should be used in order to avoid a sharp step at the meter inlet which would cause liquid swirl effecting metering accuracy.
Fluid Flow in PipesFlomec
Rotor leading edge (angled)
FLOW DIRECTION
Bearing supports
Rotor trailing edge (squared)
Viscosity effects
viscosity [cSt ] ) x normal min. flow rate( 0.7
The effects of increasing viscosity reduce the linear flow range, the lower end flow rate is to be raised as the viscosity increases with a maximum viscosity of 10cSt. To calculate the low end accurate flow rate limit use: 0.7 x the square root of the metered liquid viscosity in cSt x normal minimum flow rate. Eg. If normal flow range is 10~100 l/min then for viscosity of 5 cSt minimum accurate flow rate would be 15.65 l/min.
Applications
Typical industry applications include:
(Liquids with viscosity below 10 cSt.)
Chemicals & allied Products.
Pharmaceuticals.
Fuel consumption
Fuel additives
Deionised water
Hydraulics
Coolants
Batching & blending
Liquid Fertilizer
ApplicationsFlomec
TP SeriesModel Prefix
316 stainless steel body & rotor shaft
Process connection
Body Material
15- 150 mm (1/2" - 6")Suit Pipe Sizes
Rotor Material 316 stainless steel
Viscosity Limit
Screwed or flanged
10 mm2/s. ( 10cSt )
Flow Range 0.11 – 550 M3/hr.
Linearity @ 1cP Linearity typically +0.5%, of Reading +1%,
Threaded to 250 bar, flanged according to flange specificationMaximum Pressure
SpecificationsFlomec
Repeatability +0.2%, under steady flow conditions
Pressure Drop Approx. 0.28 bar at maximum flow ( SG=1, Viscosity=1 mm2/s )
2 Wire reluctance type pick-off coil (40mV P/P at minimum flow rate )Polarity insensitive 20 metres maximum transmission distance
Outputs (standard)
Protection Class IP66 / 67
Temperature Minus 50 to plus 120 deg .C optional 240 deg. C
2 wire 4mA (off) and 20mA (on)current pulse (12…24Vdc ) 3000 metres maximum transmission distance
Preamplifier
Recommended Filters Sizes up to 50mm ( 300 microns or 60 meshSizes 80mm and above ( 500 microns or 100 mesh )
TP SeriesModel Prefix
SpecificationsFlomec
Turbine Wheel flow meter TP Series
TP-12
TP-13
Stainless Steel / Carbon Steel
Stainless Steel / Stainless Steel
Body Material 316 stainless steel.
TP-13 Screwed
05 = 0.11 – 1.1 m3/h
10 = 0.22 - 2.2 m3/h15 = 0.40 - 4.0 m3/h20 = 0. 80 - 8.0 m3/h
Ordering InformationFlomec
G4 = ½” male
G5 = ¾” male
25 = 1.60 - 16.0 m3/h G6 = 1” male
30 = 3.40 - 34.0 m3/h G8 = 1 1/2” male
35 = 6.80 – 68.0 m3/h G9 = 2” male
XX = Special Option XX = Special Option
Range Connection
Turbine Wheel flow meter TP Series
TP-12 / 13 Flanged
05 = 0.11 – 1.1 m3/h
10 = 0.22 - 2.2 m3/h15 = 0.40 - 4.0 m3/h20 = 0. 80 - 8.0 m3/h
Ordering InformationFlomec
F4 = DN15, PN16
F5 = DN20, PN16
25 = 1.60 - 16.0 m3/h F6 = DN25, PN16
30 = 3.40 - 34.0 m3/h F8 = DN40, PN16
35 = 6.80 – 68.0 m3/h F9 = DN50, PN16
40 = 13.5 – 135 m3/h FB = DN80, PN16
Range Connection
45 = 27.0 – 270 m3/h
50 = 55.0 – 550 m3/h
FC = DN100, PN16
FB = DN150, PN16
XX = Special Option XX = Special Option
Insertion Paddle Wheel TP Series
Pick-off Style / Type M1 = MS ( military style ) connector for 120 deg C max.M2 = MS ( military style ) connector for 240 deg C max.M4 = MS ( military style ) connector pre-amplified for 65 deg C max.F1 = Flying leads ( compact meter mount, see electronics ) for 120 deg C max.XX = Special OptionF6 = NPN OC + 1.5V – integral electronic ZOD on stem kit
Ordering InformationFlomec
Order Example: DOT-13 15 N5 F1 B1 0
-00 = Frequency output only FBT11 = Electronic TotalizerFRT12 = Electronic Rate / TotalizerFRT20 = Electronic Rate / Totalizer FEB1 = Electronic Batch Controller XX = Special option ( specified in clear text )
Electronics
Special options None = Without optionsY = Special option (specified in clear text )B = Linearity 0.15% ( instead of 0.5% )2 = 2 x Pick off coils