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Orifice Plate Flow Meter

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Orifice plate: a thin plate with a hole drilled into it, inserted into a pipe or another section of a liquid flow system. Read More…

Orifice Plate Flow Meter Orifice plate flow meters, also known as orifice plates, are a type of pressure-based flow meter. These flow meters measure system flow rate using, not surprisingly, an orifice plate. Orifice plate flow meters provide data on the volumetric or mass flow rates of a fluid, based on the reading taken from the orifice plate.
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Leading Manufacturers

Monterey, CA  |  831-373-0200

Sierra manufacturers high performance mass flow meters and controllers for nearly any gas, liquid or steam. Customers choose Sierra when they need an accurate and repeatable flow measurement, short delivery lead times, expert flow advice and long term support. When it matters, choose Sierra. Visit www.sierrainstruments.com.

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Sierra Instruments $$$

Sturtevant, WI  |  262-886-2695

SIKA is a developer and manufacturer of flow control products and a wide variety of other measuring and monitoring systems. Our inventory includes flow sensors, flow meters, flow switches, and many more. We know that flow solutions aren't one-size-fits-all, which is why we provide consultation and flow management solutions that are individualized and customized to your requirements. When you choose SIKA, you will receive efficient, durable products and customer service tailored to your needs.

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SIKA USA $$$

Itasca, IL  |  888-539-3623

Keyence is a leading supplier of flow meters and many other automation components. Our flow meters are compatible with everything from compressors to receiving tanks to machine drop points, while measuring both overall usage and costly leakage amounts. Additional features include multiple numerical and graphical data displays. Visit our website to find out more about our products.

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Keyence Corporation of America $$$

Wilmington, NC  |  910-392-2490

Since 1984, Eastern Instruments has been engaged in the development of solid particle mass and airflow measuring and control systems for clients in the food, petrochemical and agricultural industries. Many of the “legend” companies use Eastern Instruments’ in-processes, making brands that touch the lives of millions every day.

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Eastern Instruments $$$
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Orifice plates can have sharp leading edges with a short cylindrical section, a fully rounded leading edge with no cylindrical section, or a beveled leading edge with a very short cylindrical section. Respectively, these orifice plate types are known as: sharp edged thin plates, quarter-circle or quadrant-edge orifices, and conical inlet or conical entrance plates.

As fluid pours into the orifice, flow pressure increases, and flow velocity decreases. This happens because flow rate has to slow down and constrict in order to fit through such a small opening. Once the flow has passed through the hole, flow pressure decreases and flow velocity increases again. To find flow rate and velocity, these meters use the same principles as venturi flow meters.

That is to say, they use the relationship between the velocity of a liquid and the pressure of the liquid to determine the actual velocity of the flow of liquid. For example, if the pressure of the liquid decreases, then you know that the velocity of the flow has increased. They also determine flow rates by measuring the difference between the pressure of the upstream fluid and pressure of the downstream fluid.

Orifice plate flow meters are ideal for piping systems that contain a well-mixed, continuously flowing single stream liquid. They can also be used to slow or restrict flow. When used for the slowing or restricting of flow, they can alternatively be referred to as “restriction plates.”

One of the most common applications of orifice plate flow meters is the measure of natural gas. They are also frequently used to measure low viscosity liquids. They can be found in the petrochemical, aviation, automotive, medical, chemical, and water treatment industries, among others.

If you are interested in learning more about orifice plate flow meters, consult a reputable flowmeter manufacturer and see if they can provide a solution for your application. Make sure to talk to them about any industry or governmental standards to which your flow meters must adhere.

Orifice Plate Flow Meter Informational Video