CAT.No.CBT003E-4

EX TURBINE
INDUSTRIAL TURBINE METER

Based on the theoretical analysis in fluid dynamics
and experimental approaches in the field of liquidflow measurement,"EX TURBINE" series was developed for highaccuracy and durability for a wide range ofviscosities. For example, petroleum products ingeneral, liquefied gas, chemical products andwater applicable to process control, and loading/unloading systems for general fluid flow
management.

EXTURBINE▲EX TURBINE is compatible with a wide choice of receiving instruments available for other types ofOVAL flowmeters. We also supply converters equipped with a local totalizer or indicator formonitoring at the point of measurement.

Integrally-mounted
LCD total counter
Model PA14S
A converter with cumulative
digital total counter and resettable counter.
The total count is retained to aninternal non-volatile memory(EEPROM) as backup.

Integral type

Separate type■ GENERAL SPECIFICATIONS
Description

Item
Nominal size

80 to 400mm

15 to 50mm

ModelLow temp.

StandardHigh temp.

Standard (High) High viscosity

Flow range

1 to 54m3/h

0.63 to 54m3/h

1 to 54m3/h

10 to 4500m3/h

2Operating temp. range
Max. operating pressure

Linearity
Converter

Display
OutputThan 10mm2/s

Than 1mm /s

Kinematic viscosity−200 to −30℃

−30 to +120℃

120 to 300℃

45.2 to 4500m3/h−30 to +300℃

Depends on flange rating.
±0.15% or ±0.35%
Without display or total count
Pulse or analog(Pulse only for model w/totalizer; analog only for model w/analog instant. output)

Power supply

12 to 45V DC

Construction

Non-explosionproof or explosionproofAiming at an ideal turbine meter design
With low pressure loss, long service life and a wide range ofacceptable fluids, two types available to choose from.
Standard EX TURBINEEX TURBINE for high viscosity service■ Features■ Features①A high degree of accuracy
Linearity to ±0.15% in the most demanding
application.
②Low pressure drop saves energy.
③High resolution and consistent accuracy overmany years' service.
④The turbine rotor made up with the latest
precision-machining techniques featuresinterchangeability.
⑤Fine ceramics and tungsten-carbide alloy areused for rotor bearings to increase durability.
⑥A broad operating range from −200℃ to+300℃.

①Introduction of a shroud ring permits precise
liquid flow measurement in low Reynolds
number regions.
②A high frequency of pulses generated perrotor revolution benefits meter testing withthe master, such as a pipe prover.
③Linearity to±0.15% or better..... desirable
in the accounting field.
④Rotor blades - paper-thin yet sturdy enoughthanks to a double-ended shroud ring,and shaped to give a helical surface area
reduce pressure loss more than thetraditional cantilever, or single-ended, blades.

Operating Principle and Construction

EX TURBINE measures the process fluid
flowing across it with a rotor turning freely on
its shaft which is fixed parallel to the flow path.
As the rotor turns proportional to the flowrate,
this rotational frequency is electrically picked
up to obtain the flowrate information. Due to themarked difference in nominal diameter/
flowrate, the small and medium size EX
Turbine meters have bearings and support
members designed to minimize their crosssectional area, whereas the medium and large
size EX Turbine meters are so designed toincrease rotor blade rigidity relative to theirdiameter to achieve precise flow measurement
in low Reynolds number regions.

●Converter
Voltage signals generated from anelectromagnetic pickup are amplified
and modulated and then transmitted
to a receiving instrument.
A direct-reading local display is alsoavailable upon request.

●Pickup
Senses the rotation of the rotor in theform of voltage pulses proportional toactual flowrate.

●Front Support

Rotor blades, ideally shaped into ahelical surface area, are characterized
by exceptionally stable performance
characteristics.
For medium and large sized EX
Turbine, rotor blades are secured to ashroud ring at their free ends toimprove rigidity, making possible themetering of high-viscosity fluids. Thedesign also serves to increase the rateof generated pulses.

The rotor hub diameter is smaller thanthat of the rear support in our design,
resulting in a greater sectional area ofthe flow path around the rotor hub anda reduction in flow velocity. As a result,a pressure (ΔP) acting on the reverse
face of the rotor, opposite to the flow
direction, appears to cancel out the thrustforce (Ps) acting on the shaft.

Front
Support●Rear Support
This member serves to straighten
turbulent flows with swirl created
immediately past the rotating rotor.

●Rotor shaft and Bearings●Meter Body
Made of stainless steel for outstanding
corrosion resistance. Has adequate
strength as a pressure vessel.

Taking into consideration the corrosion
and abrasion resistance, the small
size EX TURBINE uses tungstencarbide alloy, while the medium andlarge size EX TURBINE use stainlesssteel combined with tungsten-carbide
alloy.
In addition, our hydraulic balancesystem eliminates the thrust dragacting on the bearings.

RearSupportPs
ΔP

D1

D2

D1FlowPressureThis front member is used for upstream flow pattern conditioning,
maintaining effective rotation of therotor elements. For medium and large
EX TURBINE, a defuser is provided
to achieve ideal velocity distribution.

●RotorHYDRAULIC BALANCE

ΔPFlow DirectionAPPLICATIONSEX TURBINE exhibits desirable meter error characteristics comparable to the OVAL PD flowmeter.
Small in physical size, yet flexible enough to handle large quantities of the process fluid. Thesebenefits are all the more remarkable when you note how it works in high Reynolds number regions.

LPG loading control for tank trucks
EX Turbine is ideally suited for metering low viscosity
liquids, such as LPG. Tank truck loading service, inparticular, is one of its applications where linearity to±0.15% and long-term maintenance-free operation
are required as essential conditions.
The EX Turbine is the right answer to meet both ofthese needs.

Calibration to establish and maintain
EX Turbine accuracy
OVAL employs world's top flowmeter calibration
facilities, including pipe provers, which are traceable tothe established international standards, for proving EX
Turbine meters, and for simulating actual user
conditions with water, oil, or any other fluids.
Inferentialtype meters, including the EX Turbine, aregenerally effected of the given operating conditions.
We therefore conduct stringent meter error testing
before every EX Turbine leaves our factory to insure
its stated performance under customer's particularoperating conditions.

The specification as of October, 2015 is stated in this catalog. Specifications and design are subject to change without notice.

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

http://www.oval.co.jp/english
0005 1510 - - - - S