Independent technical reference. Not affiliated with, endorsed by, or a distributor for Flomec/GPI. No product is offered; this page describes the meter's technology.
The OM025 is a 1-inch oval-gear meter with a digital display, part of Flomec's OM series of compact positive-displacement instruments. This page covers the OM-series oval-gear technology and typical duty.
Compact Oval-Gear Metering
The OM025 uses the oval-gear principle: two meshing rotors carry a fixed volume per revolution, giving direct positive-displacement measurement of the fluid. At 1 inch (DN25) it suits transfer and dosing of fuels, oils, solvents and chemicals at flows up to the tens of litres per minute, with accuracy typically around ±0.5% of reading and better repeatability, improving with viscosity.
Digital Readout and Outputs
The OM series pairs the mechanical measuring element with an electronic register: a local digital display of rate and total, plus pulse or analogue outputs for connecting to a controller or batch system. Body and rotor materials (aluminium, stainless, or engineered polymers such as PPS) are chosen for compatibility with the metered fluid.
Care in Service
As with every oval-gear meter, protect the fine rotor clearances with an upstream strainer, exclude vapour, and size the meter to the actual flow. Because the OM025 offers a pulse output as well as a local display, it integrates neatly into an automated batching or blending system, where the controller counts pulses and closes a valve at the target volume. Confirm the K-factor on the calibration certificate before relying on that pulse count, since it is the number every totalised reading depends on. See the oval-gear technology and PD principle pages for the full background, and the selection guide for sizing.
For broader mechanical-measurement practice, the American Society of Mechanical Engineers (ASME) publishes useful independent guidance.