Para asistencia en español, llame al +52 (442) 295-1567 o envíe un correo electrónico a

KPL - Orifice Plates for Differential Pressure Flow Measurement

KPL - Orifice Plates for Differential Pressure Flow Measurement

Product Features

Multiple Configuration and Design Options
Low to Moderate Pressure Loss
Cost-Effective and Rugged
Starting at
Request Quote/Demo Flow Product Filter Schedule a Free Engineering Consultation

Differential Pressure Orifice Plates

KPL orifice plate assemblies are commonly used to provide a reliable and often cost-effective differential pressure reference for flow rate measurement in medium to large diameter industrial piping. Because the measurement principle does not have any moving parts, a long service life with minimal maintenance required is guaranteed. KPL orifice plates are available in a wide range of specific constriction methods to optimize compatiblilty with specific application requirements and challenges. Options include concentric orifice plates, bidirectional orifice plates, quarter circle nozzles, conical entrance orifices, segmental orifices, and excentric orifices.

Differential Pressure Measurement Principle

If a pipeline with flowing media is reduced at a particular point by a cross-sectional constriction, the flow speed of the measured media is increased at that point. According to Bernoulli’s energy equation and the law of continuity, the total flow head (dynamic velocity head and static pressure head) is constant. The increase in speed at the constriction causes a reduction in the static head. The resulting pressure drop is called the differential pressure head and may then be used to measure the flow rate (volume per unit of time or mass per unit of time). The flow rate is a function of the square root of the differential pressure across the orifice plate. This rate can then be determined by use of an appropriately scaled differential pressure transducer or gauge.

Total Differential Pressure Flow Measurement Assmeblies Using Orifice Plates

Differential pressure measurement with orifice plates is achieved by the primary constriction element of the orifice plate paired with a differential pressure transmitter which converts the pressure difference before and after the point of constriction caused by the orifice plate and converts it into a standard output signal. Choosing a transmitter, like our PAD Heavy-Duty Industrial Differential Pressure Transmitter, that features an internal square root extraction assures a linear signal.

Integrated Differential Pressure Orifice Flow Meters

If an integral orifice flow meter is desired, KOBOLD offers the RCM Differential Pressure Orifice Flow Meter for liquids, gas, or steam. It offers high flow rate capabilities and is suitable for small to medium sized line sizes. Also available is the KEL Heavy-Duty Differential Pressure Flow Meter for liquids.

Product Specifications

Maximum Pressure
420 Bar (Class 2500 tmax +500 °C )
Maximum Temperature
500° C
Process Connection
DN 50 ... DN 600, 2" ... 24" ASME Flanged
Wetted Material
Stainless Steel, Carbon Steel, Others
Media Categories
Liquid, Gas, or Steam

Product Features

Multiple Configuration and Design Options
Low to Moderate Pressure Loss
Cost-Effective and Rugged



There are no videos to display at this time. If you think this is incorrect, please contact us and let us know the issue you are having.

Software Downloads

There is no downloads to display at this time. If you think this is incorrect, please contact us and let us know the issue you are having.


There are no accessories to display at this time. If you think this is incorrect, please contact us and let us know the issue you are having.

Who Are We?

We are a value-driven global manufacturer of process and control instrumentation. Since 1980, we have offered one of the most comprehensive lines worldwide; consisting of flow, level, pressure, temperature, and more.

Here in our Pittsburgh-based US headquarters, we manufacture, sell, and support high-quality solutions for countless industries and applications.

Our passion is partnering with you to measure what matters and producing the finest products to do so.

Thank you for considering us as your application solution partner.

Why Choose KOBOLD?

KOBOLD is proud of our products, our people, and our processes that enable us to provide ideal application solutions and an unrivaled buying experience whether you are an end-user, OEM, or engineering firm.

Our People

KOBOLD is a fast-growing employer of choice, focused on team empowerment, employee engagement, and an exceptional work experience.

We are proud to have team members that have been with us for decades who can provide you with a wealth of industry, application, and product knowledge.

Our Products

Our products are well-known for their quality, reliability, longevity, Innovation, and long-term value. Backed by German engineering and US manufacturing, our solutions remain cost-competitive even though they are not mass-produced.

Many of our products were created in partnership with customers who were unable to find a solution elsewhere and we can do the same for you.

Our Process

Finding the right process instrumentation doesn’t have to be intimidating. Because we make, sell, and support our products, we provide a guided, streamlined, and efficient experience that is built around your needs and our knowledge. We partner with you as much as you want, every step of the way.

Many manufacturers with limited product lines force a fit between their product and your application, often leading to over-specified and over-priced recommendations. Our comprehensive product line allows us to tailor the product to your application, not the other way around. We approach your product selection with a focus of integrity, not profit.

Other Members of the KOBOLD group
Heinrichs Henschen Mesura Unirota