CAT.No.CBL003E-2

ULTRA UF-Ⅱ Type S

Characterized by low noise operation, less vibration and free from pulsation inflow owing to our proprietary spiral rotors, the high-precision PD flowmeter UF-II
series find extensive use primarily in loading and unloading applications ofpetroleum products.
A latest addition to the field-proven UF-II series product line is the ULTRA UF-II
series equipped with a versatile electronic register of our ULTRA OVAL series.
The register generates pulse and analog output, realizes efficient calibration
with high rate pulse trains, adds intelligence and smart inclusion technology
and completes our product line up with features and functions that are suitable
for the new generation of field sensors.

Silent operation and vibration free.
Features● Uniform rotation, uniform flowrate and uniform

torque.
Proprietary-designed rotors offer (1) uniform rotor
motion, (2) uniform flowrate free from pulsation, and(3) uniform rotational torque. No energy transfer
takes place between the rotors.
● Simple construction with no pilot gears required.
● Long life.
Thanks to the absence of slippage between mating
rotor teeth, extremely long life is achieved.
● Small in size, yet can handle large quantities offlow.
Large discharge per rotor revolution and relatively
fast rotor R.P.M. permits metering large quantities ofprocess fluid for its small size.

● The ULTRA register equipped with a CPU

indicates total flow, resettable total flow, instantaneous flowrate and low battery alarm on theLCD by changing the mode selector.

● Two remote signals are provided - total flow

signal (factored or unfactored current pulse,4/20mA DC) and instantaneous flowrate signal(analog, 4/20mA DC) simultaneously.

● Available with a complete line-up of explosion-

proof models.

● By combining a batch-controller equipped Ultraregister, LW74E, LW76E, you can establish a
simple batch system.

Principle of Operation
Having a pair of rotors as revolving elements (see photo at right), the UF-ll is a positive
displacement flowmeter which directly measures the volume of flowing fluid passing through.
A pair of these spiral rotors are directly in gear with each other specially designed andprecisely processed to achieve a zero slip factor. Operation principle is shown in the figurebelow. As the process fluid flows into the measuring chamber, the rotors are, under adifferential pressure that exists between the inlet and outlet, made to rotate in the direction
opposite to each other as shown by arrows.
In figure ''A'', viewed on a plane illustration, a rotational force acts only on the first rotor; norotational force acting on the second. But these rotors in actual are twisted as shown in thephoto. Each rotor receives the same rotational force, resulting in uniform rotor rotation andSpiral rotors
uniform rotational torque with no pulsation in the flow being discharged.
Each space formed by the rotors and the inner wall of the measuring chamber serves as a pocket (colored in blue) and, in one
complete rotor revolution, the process fluid of eight times the volume of this pocket is delivered to the discharge outlet. Therefore,taking this rotor rotation by rotational frequency, we can measure the exact total volume of the process material delivered, while theinstantaneous flowrate can be measured by the rotational velocity.

CBA

1st rotor2nd rotor

DEA comprehensive line-up of flowmeters available to satisfy
your loading and unloading lines.
Specifications
Item

Description

Meter Size

81

80

Typical Applications

Metered Fluids
Nominal Diameter
mm (inch)

Mainly, loading totank trucks
Gasoline, kerosene,light oil, heavy oil,other petroleum products(excluding naphtha and LPG)
80 (3)
100 (4)

83

Flow Direction

RotorBushing

87

88

gasoline, kerosene, light oil, heavy oil, other petroleum products (excluding naphtha)

150 (6)200 (8)200 (8)250 (10)250 (10)300 (12)300 (12)350 (14)350 (14)400 (16)400 (16)450 (18)

180300

410

590

950

1400

20002800

JIS 10K RF, JIS 20K RF, ASME 150 RF±0.35％ or ±0.15％ of reading or better

Right→left (std.), left→right, top→bottom, bottom→top

Meter body

86

Mainly, marine loading and unloading

FC250: JIS 10K FF,
ASME 125 FF
SCPH2: JIS 10K RF,
ASME 150 RF±0.15％ of reading or better

Linearity85

100 (4)150 (6)120
Max. Operating Temperature 120℃
Flange Ratings

84

100 (4)Max. Flowrate (m3/h)

Materials

82

FC250 with special surface
treatment or SCPH2 withspecial surface treatment
FC250 with specialsurface treatment
Carbon bushings

Right→left (std.), left→right

SCPH2 or SCPH2 with special surface treatment
FC250 or FC250 with special surface treatment

Performance Characteristics■ Meter Errors and Pressure Losses■ Noise Level

UF-II flowmeter Meter size 85

UF-II flowmeter Meter size 85△ : Heavy oil 22 to 23 mPa·s○ : Kerosene 1.5 mPa·s● : Gasoline 0.44 mPa·s

Fluid: kerosene

40030−0.2+0.42010080
Noise Level (phon)+0.4+0.2

Pressure Loss (kPa)

Meter Error (%)

500100

200

400

600

7060200

800

400

600

800

900

Flowrate Q m3/h

Flowrate Q m3/h

■ Vibration■ Frequency Response

UF-II flowmeter Meter size 85

UF-II flowmeter Meter size 85

Fluid: kerosene

Fluid: kerosene

Amplitude:

400

15300

10,
Top

50om

Bottight

Lefe,R200

400
Flowrate Q m3/h

600

800

200
100

900

80
Noise Level, dB

20Acceleration of Vibration, Gal

Amplitude (peak-to-peak), μm

Acc. of Vibration:

hm/390070

30m70603050/h

100300 500

1000

Center Frequency of Bandwidth, Hz

3000

5000 10000Connection with receiver
ULTRA UF-Ⅱ is available in the following types: a battery driven type (without output) that requires no external power
supply and an external power supply type (with pulse output and analog output).
ULTRA UF-ⅡReceiver
Externalpower supply

Pulse

TOTALIZER(EL0122, EL0123)

BATCH COUNTER(EL1812)

Analog (4-20mA)

RecorderPULSE
DISTRIBUTOR(SU1508)

Other
instruments

Related products developed according to applications
Smart type register● More advanced process operation has been achieved with “communication”!
With the smart type register, not only reading of measurement information but also
reading out, setting and self-diagnosis of various parameters including instantaneous
flowrates, spans and meter coefficients can be performed in a control room away fromthe field using the smart communication unit (EL2310), while at the same time facilitating
maintenance. Furthermore, by utilizing the optional multi-drop function, a maximum of
15 transmitters can be connected to a host computer using two-wire cable, which
minimizes wiring.

Total or instantaneous flowrates(0-100% or actual flow) arelocally displayed.

EL2310Smart communication unit
Laptop computer

ULTRA register with batch control function● Positive displacement flowmeter “ULTRA UF-Ⅱ” comes witha fixed-quantity function. Combination with an automatic
ON/OFF valve enables simplified construction of ahigh-per formance field-type batch system.
● Fully pneumatic(Batch counter is powered by built-in battery.)● Depending on your application, you can select one-stage
opening/closing valve (LW74E) or two-stage opening/closing valve (LW76E) which enables accurate batchoperation.

Valve controlsystem

LW74E

LW76E

Pneumatic one-stageopening andone-stage closing

Pneumatic two-stage opening
and two-stage closing(Through setting, it can bechanged to one-stage opening.)

Setting method

Push button type (LCD counter: 6 digits)
Accumulated
LCD counter: 8 digits
value(cumulative value)

Alarm

Battery capacity drop, excessive batch,
non-arrival of pulse (LCD)

BackupTotal values, set values, etc. (Stored in EEPROM)
Intrinsically safe explosionproof (Exia IIB T3) andwater-jet proof (IP65) configurations

Configuration
Ambienttemperature−10 to +60 °C

Power supplyDedicated lithium battery(Battery life: Approximately 4 years. However,it differs depending on use conditions.)

ULTRA register with automatic temperaturecorrection function● Automatically converts into volumetric rate of flow witha reference temperature!
This ULTRA register can be used for applications that
require flowrate measurement at a prescribed reference
temperature, for example, in the case of petroleum
trading, having a function to convert into a flowrate at areference temperature. Available to all types of ULTRA
UF-Ⅱ.

Temperature input Platinum resistor (Pt 100Ω)Temperature range −10 to +150 °Cfor correction
8-digit LCD
Display
Two output types can be selected from various
Outputpulse signals and analog signals
JIS K 2249 standards, JIS K 2240 standards,
Calculation
3α correction
Conversion
Within ±0.1%
accuracy• The specification as of April, 2023 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.

3-10-8 Kamiochiai, Shinjuku-ku, Tokyo 161-8508
Phone: +81 3-3360-5121 FAX: +81 3-3365-8605

https://www.oval.co.jp/english
2007 2304 2007S