Oval Gear Flow Meters

Traditional, mechanical, positive

displacement flow meters, with oval

shaped gears; first invented more

than 60 years ago by OVAL

Corporation of Japan and now widely

used for flow metering applications

OVAL Corporation of JapanA leading manufacturer of precision and speciality flow

meters and is recognised as a pioneer in the field of

flow measurement and control:

• Specialists in flow measurement and control for over 60 years

• Recognised throughout the world for its high quality flow solutions

• Product range based on state-of-the-art and traditional flow technologies

• Modern manufacturing facilities with high precision machining and quality control systems

• Master meters traceable to national and international standards

Oval gear meters are available in a

range sizes and designs .......

.... and with a range of

gear profiles

Example: Compact Oval Gear Flow Meter

The Flowmate series of compact oval gear flow meters offers a

cost effective yet accurate and stable solution for flow

measurement in low flow ranges:

• Flow range 0.1 to 500 L/h or from 0.09 L/hr (size 38)

• Simple, robust construction

• Operating temperature range: -20 to +80°C

• Built-in pulse generator for remote control

• Ideal for metering fuels, fuel oils and lubricants

• Nominal size: BSP 1/8 or 1/4

Example: Flanged Oval Gear Flow Meter

The Flowpet EG is a positive displacement, oval

geared flow meter for fuel oil metering or boiler

feed water with high temperature option:

• Robust, proven technology with inherent accuracy of measurement

• Digital LCD register shows total and instantaneous flow

• Meter face can be orientated to any angle over 180°

• Operates on an external power source or internal battery

• Wide flow range covered, up to 24000 L/h for oil service

• High temperature version operating at up to 150°C

Oval gear meters

measure flow by

employing a geared

rotor to pass known

volumes of a fluid

through a housing …..

Oval GearsDisplay Transmission Gear

Pulse Generator

.... Counting the ‘known volumes’ gives a measurement of the

volumetric flow rate. This is typically achieved by embedding

magnets in the rotors, which then actuate a reed switch or

provide a pulse output as they rotate.

OVAL Gear Flow Meter Advantages• Traditional proven flow technology

• Simple to install

• No straight pipe runs required so flow meters can be installed in restricted areas

OVAL Gear Flow Meter Limitations• Not suitable for steam or multi-phase fluids

• Fluid slippage adversely affects accuracy; this varies with flow rate, differential pressure, temperature, viscosity and clearance

• Accuracy adversely affected by bubbles present in fluids

OVAL Gear Flow Meter Applications

The oval gear flow meter is designed primarily for use with higher-

viscosity fluids, which has led to applications in metering of oils,

syrups and fuels, for example:

• Dosage and metering of additives

• Determination of net fuel consumption

• Leakage monitoring

• Fuel cell applications

• Fuel oil metering

• Shipping and accepting petroleum products

The main questions which need to be considered

before selecting an oval gear flow meter:

• What is the viscosity range of the fluid being metered?

• What is the minimum and maximum working flow range?

• Is the fluid clean; are there any solids present?

• What is the minimum and maximum process pressure?

• What is the minimum and maximum process temperature ?

• What is the degree of accuracy required?

• Is an output required and, if so, what type?

• Is the meter operating in a hazardous area?

• Are specific approvals (eg ATEX) required?

• Is a flow instrument required?

• What type of connection is required?

For more information or to discuss your application, please contact

icenta Controls LtdExclusive distributor in the UK for OVAL Corporation of Japan

Tel: +44 1722 741890

sales@icenta.co.uk

www.icenta.co.uk