BES Flowmeters supplies positive displacement (PD) flow meters for precise industrial liquid measurement — including the Flomec OM Series oval gear meters and Macnaught MX Series PD meters. Positive displacement flow meters are the preferred technology for viscous liquids, custody transfer and applications where high accuracy is required regardless of flow profile.
How Positive Displacement Flow Meters Work
A positive displacement flow meter measures flow by repeatedly trapping a fixed volume of liquid and passing it from inlet to outlet. The number of fill-and-empty cycles is counted and converted to a total volume and flow rate. Because measurement is based on volume displacement rather than flow velocity, PD meters are accurate across a wide viscosity range and are unaffected by turbulence or swirl — no straight pipe runs required.
Types of PD Flow Meters
Oval Gear Flow Meters
The most common PD meter type. Two oval gear rotors mesh and rotate as liquid flows through, trapping precise volumes with each rotation. Highly accurate (±0.5%), suitable for diesel, oil, chemicals, resins and food-grade fluids. See our oval gear flow meters.
Nutating Disc and Piston Meters
Alternative PD designs for specific applications including water custody transfer and domestic metering.
Applications
Positive displacement flow meters are used for fuel dispensing and monitoring, lubricating oil measurement, chemical dosing, hydraulic fluid monitoring, food-grade liquid measurement and custody transfer billing.
For liquid measurement using turbine technology, see our liquid flow meters. Request a quote or call (03) 5956 8685.
