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Mechanical Turbine Water Meters
Hedland Variable Area Flow Meters
Oval Gear Meters

Oval Gear Meters are a member of the Positive displacement flow meter family.  They operate by repeatedly filling and emptying compartments of a known volume with a liquid. The flow rate is then calculated based on the number of times these compartments are filled and emptied.  Want to know more? Learn More...

Oval Gear Meters - Looking from the inside out...


Choosing a GPI GM Series Oval Gear Meter is as simple as 1, 2, 3...

Step 1: Begin by selection a category below - Most Popular or Build Your Own
Most Popular Models Build Your Own
Click Here - Most Popular Oval Gear Meters

Click Here - Most Popular Oval Gear Meters

Click Here to build your Custom Oval Gear Meter  Click Here to build your Custom Oval Gear Meter
Click here to view and/or purchase our most popular Oval Gear Meters.  Flow Meters in this category are pre-configured to meet or exceed the requirements of the most common Oval Gear Meter applications. Click here to configure and customize an Oval Gear Meter to meet your specific application.  Choose Body & Rotor Materials, Connection Type, Sensor Type, O-Rings, Display and/or Output options. 

GM Oval Gear Meters - Spare Parts Quick Links

Use the hyperlinks below to view and/or purchase spare parts for each of the GM Series Oval Gear meters.  A detailed parts list for every GPI GM-Series Oval Gear Flow Meter can be found in your Operations & Maintenance Manual.  Manuals are available for download in our Resource Directory.   

1/8 inch
1/4 inch
1/4 inch
1/2 inch

1 inch
1 inch
1-1/2 inch
2 inch

1/2 inch
1 inch
1-1/2 inch
2 inch

  O-Ring Standard Display Battery  

Is an oval gear meter the best meter for my application?
Flow School - Oval Gear Meters Given their immunity to changes in viscosity, oval gear meters are ideally suited for measurement of viscous fluids or those with varying viscosities such as oils, syrups and fuels.  They're also well suited for low flow applications.  Because no straight pipe runs or flow conditioning are required, oval gear meters can be installed in tight areas where alternate technologies would fail.  Fluids should be clean and non-corrosive, preferably medium to high viscosity. 
Oval Gear Meters are generally not recommended for water or water-like fluids, because of the increased risk of fluid slippage between the gears and chamber walls.  The exception would be in low flow applications where a turbine meter would not be appropriate due to the low velocities.

Typical Oval Gear Applications

  • Lubricating Oil
  • Hi-Viscosity Fluids
  •  Greases
  • Epoxies
  • Polyurethane
  • Fuels
  • Solvents
  • Chemicals
  • Additives

Recommended Accessories - Oval Gear Meters

Oval Gear Meters work best with clean fluid, free of debris.  We carry Y-Strainers to fit all GPI Oval Gear Meters.   Strainers are available in sizes ranging from 1/4" to 2" and come complete with blow-off and plug. For information on available sizes, pricing, etc, Click Here or click the picture shown below.


Not sure which GM Oval Gear Meter is best suited for your application...   Call Us!   
Phone: (866)905-9788 / Fax: (770)929-8278

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