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Oval gear flow meters are precision positive displacement (PD) instruments designed to deliver repeatable, high-accuracy flow measurement across a wide range of industrial liquids. Within a complete flow control system, they provide stable volumetric measurement where turbine flow meters or mag meters may struggle — particularly in low flow, viscous media, batching, and dosing applications.
At BPC Valves, we position oval gear technology as part of a broader instrumentation strategy, integrating meters with valves, automation, and process control hardware to ensure reliable system-level performance. That broader strategy can also include Atrato flow meters, ultrasonic flow meters, and displays and instruments.
Oval gear meters operate on a positive displacement principle. Two precisely machined oval-shaped gears rotate within a chamber as fluid passes through the meter body.
Each rotation traps and transfers a fixed volume of liquid from inlet to outlet.
Key operating principles:
Because the meter measures actual displaced volume, performance is largely independent of flow profile and velocity conditions. This is one reason oval gear flow meters remain a strong choice for precise liquid measurement.
Oval gear meters excel where volumetric precision matters.
Unlike velocity-based meters, PD meters maintain accuracy even at low Reynolds numbers and reduced flow velocities.
Performance often improves with increasing viscosity because internal leakage decreases.
Typical fluids include:
Because measurement is not velocity-dependent, oval gear meters require minimal upstream and downstream straight runs — simplifying installation.
The fixed displacement per rotation allows for precise pulse-based control in automated dosing systems. In many of these systems, displays and instruments are used to support local readout, monitoring, and process visibility.
Material selection is critical for long-term reliability and chemical compatibility.
Common configurations include:
Within integrated systems, material selection should align with upstream and downstream valve metallurgy to ensure consistent corrosion resistance. In applications where the meter is installed as part of a broader valve package, this may also involve selecting from available valve bodies, including the VF-7 Series and VF-9 Series.
Modern oval gear meters support a range of signal outputs for system integration:
These options allow integration with:
When paired with automated ball valves or control valves, oval gear meters enable closed-loop flow control strategies.
Oval gear flow meters are commonly deployed in:
They are particularly valuable in skid-mounted systems where space constraints limit straight pipe runs. In some clean liquid applications, they may be evaluated alongside Atrato flow meters or ultrasonic flow meters depending on process requirements.
Typical performance ranges:
However, they are not ideal for:
In those environments, alternative technologies such as ultrasonic flow meters may be more appropriate.
At BPC, flow measurement is never viewed in isolation.
Proper oval gear meter performance depends on:
When integrated properly into a broader flow control strategy, oval gear meters provide:
That broader strategy may also include compatible valve bodies, including VF-7 Series valve bodies and VF-9 Series valve bodies, depending on system design.
Critical specification parameters include:
Because positive displacement meters are mechanical devices, proper sizing is essential to avoid excessive wear or pressure drop. Comparing oval gear flow meters with turbine flow meters and ultrasonic flow meters can help determine the best fit for the application.
Oval gear flow meters provide dependable, high-accuracy volumetric measurement for viscous and clean liquid applications.
When integrated with the correct valves, automation, and control architecture, they become a core component of a stable and predictable fluid handling system.
BPC Valves supports complete flow control solutions — combining flowmeters, valve bodies, VF-7 Series valve bodies, VF-9 Series valve bodies, displays and instruments, oval gear flow meters, turbine flow meters, ultrasonic flow meters, and Atrato flow meters into engineered systems designed for long-term industrial reliability.
If you are evaluating flow measurement options for viscous or precision batching applications, our team can help determine whether oval gear technology fits within your broader process strategy.
| OG1 Oval Gear Flow Meters OG2 Oval Gear Flow | Gear Flow Meters OG2 Oval Gear Flow Meters | OG3 Oval Gear Flow Meters | OG4 Oval Gear Flow Meters | OG5 Oval Gear Flow Meters | OG6 Oval Gear Flow Meters | OG7 Oval Gear Flow Meters | Metra-Clear Oval Gear Flow Meters | |
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| Oil Flow | ||||||||
| Min lpm | 0.01 | 0.03 | 0.05 | 0.25 | 0.5 | 2 | 5 | |
| Min gpm | 0.0026 | 0.008 | 0.013 | 0.066 | 0.13 | 0.53 | 1.32 | |
| Max lpm | 1 | 4 | 10 | 50 | 100 | 200 | 500 | |
| Max gpm | .26 | 1 | 2.6 | 13 | 26 | 53 | 132 | |
| Accuracy ± | 0.75%FSD | 0.75%FSD | 1.00% | 0.50% | 0.50% | 0.50% | 0.50% | |
| Water Flow | ||||||||
| Min lpm | 0.1 | 0.15 | 0.5 | 2.5 | 4 | 10 | 20 | |
| Min gpm | 0.0026 | 0.04 | 0.013 | 0.066 | 1 | 2.6 | 5.3 | |
| Max lpm | 1 | 4 | 10 | 50 | 100 | 200 | 500 | |
| Max gpm | .26 | 1 | 2.6 | 13 | 26 | 53 | 132 | |
| Accuracy ± | 1.00% FSD | 1.00% FSD | 0.50% FSD | 1.00% | 0.75% | 1.00% | 1.00% | |
| "K" Factor Pulse/l | 2050 | 1100 | 440 | 115 | 78 | 21 | 15 | |
Titan’s oval gear (OG) flow meters utilize positive displacement technology to accurately measure fluid flow. These meters transfer a discrete volume of liquid from inlet to outlet with zero loss or slippage, ensuring consistent and reliable readings. Designed for optimal performance with high-viscosity fluids, Titan’s oval gear flow meters minimize leakage as fluid thickness increases, extending their operational range to lower flow rates. The low differential pressure design allows for efficient operation, requiring as little as a few millimeters of head pressure in certain applications.
At the core of Titan’s flow meters are precision-engineered oval gears, one of which is embedded with PTFE-coated magnets. These gears rotate smoothly on robust bearings, while fluid flow is detected through the chamber wall using a Hall Effect sensor, Namur sensor, or reed switch, generating precise pulse outputs per liter. Titan’s oval gear flow sensors are highly effective for oil flow measurement and are available in specialized models for corrosive media, featuring non-metallic plastic and ceramic components for durability in demanding industrial environments.
Titan’s compact and durable oval gear flow meters are engineered for high performance and cost-effective operation. Designed to handle both water-like fluids and lubricating liquids, these meters deliver precise measurements across a variety of applications. Several models feature non-metallic wetted components, including PEEK, ceramic, and elastomer options, making them ideal for aggressive chemical metering. Standard inlet and outlet connections are BSP or NPT female threads, with housing options in 316 stainless steel, aluminum, and PEEK. For hazardous environments, the meters are compatible with Namur sensors or reed switches for safe operation.
The output provides either an NPN pulse or a voltage-free contact closure, ensuring seamless integration with most electronic display and recording devices. Built with high-quality materials, Titan’s oval gear flow meters offer long-lasting durability, accuracy, and reliability. PEEK, a key component in the gears and bearings, provides exceptional pressure and velocity characteristics, along with outstanding thermal stability and chemical resistance, making it an excellent choice for demanding industrial applications.
