CAT.No.CBD103E-5[Vortex Flowmeter]

SeriesRenewal

EX DELTAⅡ- Battery Powered
PAF5 Model

EX DELTAⅡ- Smart Model

Insertion type EX DELTAⅡAn extensive product lineup that enables flexible measurement system configuration.

EX DELTAⅡ SeriesHigh performance supports various applications
With a combination of a triangular-section bluff body and a piezoelectric sensor, the flow rate of liquid, gas, and steam can be measured to a highdegree of accuracy.

User-friendly and low-cost
Simple and durable design provides ease of use and maintainability, substantially saving initial cost, running expense, and total cost.

Increased safety
A hard-to-clog structure with minimum seals. The replaceable sensor in particular enables servicing and maintenance while the senor is installed
without interrupting the flow.
Piping Arrangement

Saves energy and space
Low pressure loss is synonymous withenergy saving. A dedicated flow

OVAL'sFlow
Straightenerstraightener also reduces installation space.

L

L=8D

Flow

Honey Vane·L

OVAL'sFlow
Straightener

LFlow

L=12D

Flow Straightener(L=Straight Pipe Length, D＝Nominal size)

Operating temperature range: -30 to +460°C (high temperature type)The minimum temperature of -196℃ is available by special request. Explosionproof protection is available for -196°C to +420°C.

Vortex detection principle
The vortex flowmeter is configured with a bluff body that generates Karman vortices, a sensor that detects vortices, and a transmitter thatprocesses signals detected by the sensor. When the flow creates Karman vortices alternately on each side of the bluff body, alternating stresson the sensor is generated. This is detected by the piezoelectric element, amplified and shaped by the transmitter, and then obtained as apulse proportional to the flow velocity.
Receiving instrument
Transmitter
Sensor stressSensorKarman vortex

BluffbodyDifferential pressure variation
during vortex generation

SensorSensor stress variation

Sensor output
waveform

Charge amount variationin piezo element

Preamplifier
output waveform

Piezo element
Voltage induction

Battery powered EX DELTA Ⅱ• No power supply installation required• Available with Separately mounted transmitter and explosionproofprotection• 7 year battery life when operated 24 hours a day(Integrally mounted transmitter)• Large and clear digital display including total and resettable counters,
instant flow rate and alarm displays• Can be installed horizontally or vertically, making it optimal for use inplace of area flowmeters which are limited in their installation position.

• Digital display

Relationship between stress direction ofsensor and output voltage

EX DELTAⅡ S e r i e s

Maintenance/inspection can be carried out
without stopping the line
Replaceable sensor[Nominal size] 15 to 300mm• Maintenance and inspection of vortex detector can be done withoutdisconnecting the flowmeter from piping or stopping the fluid flow.
• Bypass piping is unnecessary• Suitable for long-term continuous operation process
Gets rid of bypass piping:

Bypass piping(Maintenance and inspection can be done without bypass piping)

The insertion type reduces construction cost andmaintenance cost
Insertion type EX DELTA Ⅱ[Nominal size] Fixed installation: 200 to 2,000mm
Hot-tap installation: 400 to 2,000mm• Considerably reduces construction and maintenance costs related to fluid
measurement of large-diameter piping.
• Flow rate can be measured by just inserting the probe in a newly installed orexisting piping.

Fixed installation• The Hot-tap installation enables maintenance and inspection of vortex detection
sensor without stopping the flow of fluid.
• The Hot-tap installation is most suitable if the bypass piping is unavailable.

Hot-tap installation

EX DELTA Ⅱ• DIA

Separately mounted transmitter• The diamond-shaped bluff body with superior characteristics
is adopted.

• Suitable for where the piping iss
densely installed, high places,
dangerous zones, etc.

• Separate-sensor configuration separates the sensor from thebluff body.
• Suitable for the measurement of fluids with easily-accumulatingcomponents.
• Bluff body

Fluid that is frequentlyaccumulated

Diamond-shape prevents fluid accumulationed• The transmitter can be installedeup to 200m (Max. 50 m for thebattery type) away from theflowmeter body.
• Multiple transmitter ofs
dispersedly located flowmetersn.
can be installed in one location.

■ General Specifications
Item

Standard Type
10 to 150mm

Insertion TypeDIA̶

15 to 80mm

15 to 300mm

̶

15 to 80mm

̶

200 to 2000mm(mounted on a 100mm flange)̶Liquid○○○Gas○ (Battery powered type: min. 15mm)○×Steam○ (Nominal size: min. 15mm)(1) Standard
・Nominal size: 10mm
±2% of full scale or better
・Nominal size: 15 to 300mm① ±1% of reading or better② ±1% of full scale or better(2) Max. flow velocity: 80m/s available.
・Nominal size: only 80mm and bigger forgas and steam measurement.
① ±1.5% of reading or better② ±1.5% of full scale or better(3) Liquid only: High accuracy (option)
・Nominal size: 15mm to 300mm① ±0.75% of reading or better② ±0.75% of full scale or better○×±2% of full scale or better±1% of reading or better or±1% of full scale or better

Applicable
Nominal size
fluidWafer type (fixed sensor)
Flanged type
(fixed sensor or replaceable sensor)
Applicable pipeline diameter

Accuracy

Flow range※2Liquid (Water)

0.2 to 2510 m3/h

72 to 67800 m3/h

0.82 to 172 m3/h

Gas (0.2MPa Air)

2 to 15000 m3/h

923 to 565000 m3/h̶0.02 to 47.6 t/hAmbient temperature type:−30 to ＋120℃ (Fixed sensor only)Standard type: −30 to ＋300℃
High temperature type:–30 to +460˚C (Replaceable sensor only)
Cryogenic type: –196 to +300˚C

3.06 to 1790 t/h̶

−10 to +300℃

Ambient temperature type:−30 to ＋120℃ (Fixed sensor only)Standard type: −30 to ＋300℃
High temperature type:–30 to +460˚C (Replaceable sensor only)

5.00MPa

1.37MPa

5.00MPa

Steam (0.5MPa Saturated steam)Operating temperature range

Transmitter(integrally and separately
mounted model)

Battery
poweredSmart

Max. operating pressure(Depends on process connection type)
Display

No display or Total/instantaneous flowrate

OutputCurrent pulse (Factored, Unfactored), Open collector pulse (Factored, Unfactored), Analog output
Calculation (Mass flow fixed calculation, normal flow fixed calculation)

Other

HART protocol communications (Parameter change by dedicated communication kit is available.)

Display

Instant, total, alarm, operation lock, instant flow rate bar graph

OutputNone

OtherCalculation (Mass flow fixed calculation, normal flow fixed calculation)

Construction

Non-explosionproof or explosionproof

Smart modelPower Supply

12 to 45VDC

Battery powered

3.6V lithium-metal battery (TL-5930/F) Battery life: 7 years (integral type) or 4 years (separate type)※: For detailed specifications, see the general specification sheet of each model.

Related products tailored to applications●OVAL VORTEX FLOWMETER●Hybrid Multi DELTA●DELTA FLOWPET-DX

The OVAL VORTEX FLOWMETER measures the ﬂow rate

Made possible with hybrid technology which combines

The DELTA FLOWPET-DX with pressure compensation isby detecting the vortices generated by ﬂow velocity

two sensors of diﬀerent principles, vortex and thermal,a piezoelectric vortex ﬂowmeter with a built-in pressurechange in the following manner; temperature change inthe Hybrid Multi DELTA is capable of measuring

sensor, capable of measuring the pressure-compensatedthermistor sensor → resistance change → pulses

extra-wide ﬂow ranges as wide as 1:900 with just one

mass ﬂow rate of saturated steam and gas.

unit. This ﬂowmeter is optimal for managing the usage

The DELTA FLOWPET-DX without pressure compensationof compressed air.

can measure the volumetric ﬂow of liquid, gas, andproportional to the ﬂow velocity.
As the actual ﬂow rate is measured, the measurement is
not aﬀected by changes in temperature, pressure, andsteam.

physical properties of the ﬂuid.
※1: The conﬁguration may vary depending on the model.
※2: Flow range shown above is the sum of all sizes.

The specification as of December, 2018 is stated in this catalog. Specifications and design are subject to change without notice.
All content of this catalog is copyrighted by OVAL Corporation. Any reproduction, partial or whole, of the content without permission from OVAL is strictly prohibited.

http://www.oval.co.jp/english

3-10-8 Kamiochiai, Shinjuku-ku, Tokyo 161-8508, Japan
Tel. 81-3-3360-5121 Fax. 81-3-3365-8605
1307 1812(2106) −−−−S