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DON - Positive-Displacement Flow Meters

DON - Positive-Displacement Flow Meters

Product Features

Aluminum or Stainless Steel Bodies
Can Measure Viscosities to 1,000,000 cPs (w/Special Cut Gears)
Operating Pressures to 1,450 PSIG (Model Dependent)
Electronic Output Options Include Analog and Frequency Outputs, LCD Totalizers, Batch Controllers, U-Pace Electronics: IO-Link and Temperature Measurement
Mechanical Totalizer (½"...4" Meters Only)
Bi-directional Flow Sensing with Optional Quadrature Output
Certifications/Approvals: ATEX
Top Seller
Starting at
$651
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DON Flow Meters for Viscous Liquids

KOBOLD's DON Oval Gear Positive Displacement Flow Meters are the ideal solution for measuring clean high and low viscosity liquids such as lubricating/hydraulic oils, petroleum, ink, diesel fuels, grease, chemicals, solvents, resins, pastes, and molasses. Due to the mechanical nature of the operating principle, media with particulate matter is not recommended for use with the DON.

Reliable Oval Gear Positive Displacement Flow Technology

The heavy-duty industrial oval gear design design employs two precision-machined gears that are turned by the force of the flowing media and they allow a very specific known volume of liquid to pass through the meter with each rotation. These gears enable the DON to precisely measure liquid flow over a very wide viscosity range and provide a high accuracy volumetric flow rate measurement. Visit our article about Positive Displacement Flow Meters to learn all about the technology type and its advantages and limitations./p>

Ideal for Intermittent and Fluctuating Flow Rates

Because the measurement principle provides a true volumetric flow measurement, the DON is also ideal for flow rates that fluctuate widely and for flow that is intermittent. High accuracy measurement is assured even though these are process variables that would render other flow meter technology types non-compatible.

Higher Pressure Oval Gear Positive Displacement Flow Meters

To accomodate even higher process pressure than our standard DON Oval Gear Flow Meter, KOBOLD also makes the DON-H High Pressure Oval Gear Flow Meter. It offers the exact same rugged and reliable service for high viscosity liquid measurement.

Other Positive Displacement Flow Meters and Gear Meters from KOBOLD

KOBOLD offers a comprehensive line of Positive Displacement Flow Meters including other Oval Gear Flow Meters, Rotary Piston Flow Meters, and Helical Screw Gear Flow Meters.

Product Specifications

Flow Ranges
0.13...9.5 GPH to 40...660 GPM
Line Sizes
1/8"...4"
Fittings
NPT or BSP Threaded, ANSI or DIN Flanged
Max. Operating Temperature
Up to 300 °F (Output Option Dependent)
Media Category
Liquid

Product Features

Aluminum or Stainless Steel Bodies
Can Measure Viscosities to 1,000,000 cPs (w/Special Cut Gears)
Operating Pressures to 1,450 PSIG (Model Dependent)
Electronic Output Options Include Analog and Frequency Outputs, LCD Totalizers, Batch Controllers, U-Pace Electronics: IO-Link and Temperature Measurement
Mechanical Totalizer (½"...4" Meters Only)
Bi-directional Flow Sensing with Optional Quadrature Output
Certifications/Approvals: ATEX
Top Seller

Documents

Videos

U-Pace: KOBOLD's Universal Flow Control Electronics for Industry 4.0
Discover KOBOLD's cutting-edge U-pace electronics for flow meters, designed to seamlessly integrate with Industry 4.0 standards. This video showcases our state-of-the-art technology that combines precision flow and temperature measurement with advanced communication capabilities.

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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.

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