Oval Flow Meter

General Information

Oval are proud to be a company which satisfies the customer needs with a full series of in-house developed and tested products, constantly pursuing the principle of the ideal measurement of flow. At the same time, this society requires each responsible company to make ecological and soacial contributions on a global scale. this implies the role of flow measurement is coming of, and measurement & control technologies will become more important.

Realizing the needs of the time, OVAL, with it’s ISO9001 and ISO14001 certificates, and being acknowledged as a Japan Calibration Service System (JCSS) registered company, will keep making utmost efforts to help end-users create “value measurument”.

Oval Products

Flowrate is the quantity of fluid passing through a given section of a pipe or the like in a given period of time. We have a wide choice of flowmeters capable of measuring the flowrate under various conditions.

Most of our flowmeters are our self-developed products and are ready for quick response through nation-wide sales and service network. We can provide safe and secured flowmeters while having Japan’s No. 1 flowmeter calibration facilities.

Positive Displacement Flow Meter

In principle, positive displacement flowmeter requires no external energy such as electricity. Flowrate is calculated from the number of revolutions of a rotor(s) activated by the energy of fluid. Generally, positive displacement flowmeter offer high accuracy measurement and is suitable for totaling the flowrate. Accordingly it is used in various kinds of applications including industrial instruments. Especially, since their use was approved for taxable transactions of petroleum products by the National Tax Agency in Japan, positive displacement flowmeters have been assuming a significant role in the field of custody transfer to be certified.

Coriolis Flow Meter

Coriolis flowmeter is a mass flowmeter to directly and continuously measure the “mass”, the only characteristic of fluid that is not affected by the change in temperature, pressure, viscosity, and density of it. Based on a unique principle utilizing Coriolis force, wide range of mass flowrate based system can be configured by detecting the mass flowrate in high accuracy and sensitivity and converting it to analog or frequency output.

In addition to general liquids, flowrate of foods, chemicals, slurry, high-density gas, etc. can be measured. A major feature of the Coriolis flowmeter is a complex sensor that can measure temperature and density simultaneously with flowrate.

Vortex Flow Meter

Vortex street occurs alternately and regularly in the right and left under a given condition downstream of an object (delta shape bluff body) placed in the flow. This vortex is called Karman vortex, enabling you to know the flowrate from the frequency caused by. Vortex flowmeter is applicable to liquid, gas, and steam. It has no moving part and features low pressure loss. It is an easy-to-use flowmeter with high durability and repeatability and is widely adopted in various fields including calorie transactions and calorie control.

Ultrasonic Flow Meter

There are differences of operating principle in ultrasonic flowmeters. Our ultrasonic flowmeter measures the flowrate from the difference between the propagation times of ultrasonic waves transmitted and received alternately between two transducers A and B.

In addition, because it adopts a method based on the inverse of propagation time difference not including sonic speed in the calculation formula, highly accurate and stable flow measurement is possible. The “multipath” model with multiple sensors placed face to face can meet the requirement for higher accuracy.

Turbine Flow Meter

Turbine flowmeter measures the flowrate from the number of revolutions of a blade placed in the flow. The speed of revolutions of the blade with an axis parallel to …Read more

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