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.

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, and expert flow advice.

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Sierra Instruments $$$

West Valley City, UT  |  800-316-5342

HydraCheck offers everything needed to service, maintain and troubleshoot hydraulic systems at prices you can afford. We manufacture and distribute diagnostic test kits, flow meters, pressure gauges, tachometers, etc.

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HydraCheck $$$

Orangeburg, NY  |  800-866-3837

Aalborg Instruments & Controls is a globally recognized manufacturer of precision instrumentation for flow measurement and control. We offer variable area flow meters, thermal mass flow controllers, and more. Since our founding in 1972, it has been our commitment to develop, produce and deliver the highest quality products and services, as well as consistently meet or exceed customer requirements. We are ISO 9001:2015 certified.

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Aalborg Instruments & Controls, Inc. $$$

Concord, CA  |  925-687-8363

Since our founding in 1972, RCM Industries has served industries ranging from pharmaceutical to chemical to food and beverage. Our flow meters are designed to improve productivity, reduce cost, and protect the most sensitive equipment and processes. All flow meters are suitable for measuring water, oil, and most low viscosity liquids, and are available in Monel, stainless steel, and bronze alloys. No matter what your application, we aim to exceed your expectations.

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RCM Industries, Inc. $$$

Kent, WA  |  800-975-8153

SeaMetrics, a flow meter manufacturer, produces turbine flow meters, paddle wheel flowmeters, insertion flow meters, low-flow meters, water flowmeters, pulse flowmeters, flow sensors and electronic controls.

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SeaMetrics, Inc. $$$

Blythewood, SC  |  803-714-2000

Spirax Sarco is an established manufacturer of a variety of flowmeter products for liquid, gas and steam applications for a wide range of markets. Spirax Sarco is able to provide its customers with a family of products capable of measuring and controlling most liquids and gases.

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Spirax Sarco, Inc. $$$
placeholder image Sierra Instruments HydraCheck Aalborg Instruments & Controls, Inc. RCM Industries, Inc. SeaMetrics, Inc. Spirax Sarco, Inc.

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