At this point, a simple-structured and stable-measuring positive displacement flow meter—Oval Gear Flow Meter—is quietly becoming the preferred choice for various high-precision metering scenarios.
Are you troubled by issues such as inaccurate measurements, large errors, and difficult maintenance? It may be time to understand the true advantages of the oval gear flow meter.
Media: Diesel, lubricating oil, heavy oil, asphalt, liquid paraffin, additives, methanol, ethanol, cleaning agents, resins, etc.
* Flow measurement at the inlet/outlet of oil storage tanks
* Raw material dosing control in chemical reactors
* Precision measurement in fine chemical dosing pump systems
* Flow monitoring during loading/unloading of oil tank trucks
Oil-resistant, corrosion-resistant, vibration-resistant; capable of measuring low flow rate and high-viscosity liquids; commonly used for trade metering and precise dosing.
Media: Paint, varnish, hardeners, adhesives, inks, pigments, solvents, etc.
* Inline measurement in ink filling equipment
* Precise flow control at paint blending stations
* Automated pigment dosing systems
Fast response to high-viscosity and easily settling media, stable gear operation, suitable for both intermittent and continuous operation.
Media: Syrup, honey, chocolate syrup, jam, dairy products, vegetable oil, sauces, vinegar, etc.
* Quantitative control in automatic food filling lines
* Flow monitoring in edible oil filling
* Accurate ingredient delivery in condiment production
* CIP cleaning fluid dosage monitoring
Available in stainless steel food-grade structure, compliant with HACCP, FDA standards; easy to clean, corrosion-resistant, and bacteria-resistant.
Media: Glycerin, medical alcohol, syrup, biological reagents, controlled-release liquids, medical solutions, injections, etc.
Ingredient systems for injection/oral solutions
Precise monitoring of process fluid flow
Flow control in aseptic dosing sections
High precision, low pulsation, compact structure; compatible with electronic displays and PLC communication to meet GMP production environments.
Media: Diesel, gasoline, aviation fuel, hydraulic oil, grease, desulfurization liquid, liquid ammonia, etc.
* Fuel supply/return flow control in marine systems
* Refueling and return metering of aviation fuels
* Flow monitoring in oil depot tank areas
* Quantitative metering in power station oil delivery systems
Stable response to pressure and flow fluctuations; maintains accurate output in harsh environments.
Media: Lubricating oil, coolant, hydraulic oil, compressor oil, transmission oil
* Flow control in centralized lubrication systems for machine tools
* Gearbox oil circuit monitoring
* Online metering in automatic oiling systems
* Flow meter integration in lubricant filling equipment
Equipped with a self-lubricating structure, capable of precise measurement at very low flow rates, ensuring visibility in lubrication system consumption.
Low conductivity liquids: Unlike electromagnetic flow meters, oval gear meters are not sensitive to conductivity and can be used for non-conductive oils and solvents.
High-viscosity liquids (>1000 mPa·s): Maintains excellent linearity under high viscosity, outperforming other types of flow meters.
Intermittent start/stop systems: No need to fully fill the pipeline to start; suitable for batch production processes.
Oval Gear Flow Meters, due to their high adaptability and precision, are suitable for nearly all industrial scenarios requiring accurate liquid measurement. Not only are they “measurement experts” in petrochemical plants, but also reliable “process guardians” in the food, pharmaceutical, and energy industries.
| Industry | Application Scenarios |
| Petrochemical | Metering lubricating oil, diesel, fuel oil, asphalt, etc. |
| Coating & Ink | Measurement and blending of resin, adhesive, paint, and ink |
| Food Processing | Viscous liquid filling control for syrup, vegetable oil, sauces, etc. |
| Pharmaceutical | Accurate dosing of liquid medicines and glycerin |
| Marine & Energy | Oil transfer and engine fuel system flow monitoring |
| Industrial Lubrication | Precise control of lubricant usage in equipment systems |
Accuracy up to ±0.2~0.5%, especially suitable for applications with strict metering requirements such as trade measurement and refueling control.
Unlike electromagnetic meters, can measure non-conductive fluids such as oil and alcohol.
Internal self-lubricating gear structure suitable for media with viscosity above 2000 mPa·s.
Supports both horizontal and vertical installation; allows forward and reverse flow measurement.
Stable mechanical structure, easy maintenance, convenient component replacement.
Confirm size, pressure rating, fluid viscosity, temperature, power supply, and signal output parameters match system requirements.
Select appropriate material (aluminum alloy, stainless steel, cast iron) based on fluid properties.
* Inspect for transport damage.
* Check for installation flanges, sealing gaskets, wiring instructions, filters, etc.
* Ensure gears rotate smoothly with no debris blockage.
Install the flow meter in a stable, vibration-free area.
Avoid installing near pump outlets; maintain at least 5 pipe diameters of distance to prevent pulsating flow from affecting measurement accuracy.
Horizontal installation is best for stable gear rotation.
Vertical installation is possible, but ensure fluid flows from bottom to top to prevent gravity-related errors.
Install below the liquid level or outlet to avoid air entry or dry running.
Recommend installing Y-type or basket filter upstream.
Filtering accuracy ≥100 mesh to prevent gear damage by solid particles.
* Ensure flange alignment and tight sealing during flange/thread connections to avoid misalignment or jamming.
* Do not apply external force to tighten screws—use torque wrench.
* Do not block the measuring channel with gaskets.
* All electrical connections must be completed by professional electricians, properly grounded, and explosion-proof if required.
Slowly open the upstream valve before first run to avoid sudden flow impact on gears.
Observe for leakage, abnormal noise, or unstable readings.
Test communication (4–20mA, pulse, RS485) for successful connection with system PLC/instrument.
If unused for a long time, run dry for cleaning or inject protective oil.
| Task | Frequency | Suggested Actions |
| Filter inspection | Weekly | Clean blockages, keep fluid clean |
| Joint sealing | Monthly | Check for leaks, tighten bolts |
| Electrical connection | Quarterly | Ensure wires are tight, corrosion-free |
| Accuracy calibration | Every 6–12 months | Use third-party or on-site calibration |
| Part replacement | As needed | Replace gears, bearings, seals, etc. |
❌ No filter or poor filter precision → gear jamming or damage
❌ Dry pipe running / air bubbles → erratic readings and inaccuracy
❌ Ignoring installation orientation or incorrect wiring → signal failure or device damage
❌ Hitting meter body → gear misalignment or breakage
❌ No regular calibration → accumulated error over time
Oval gear flow meters offer excellent precision and adaptability, but only when properly installed, used, and maintained. Proper setup and upkeep not only extend device life but ensure long-term accuracy and safeguard your process.
✔ Water, oil, alcohol, acid-base solutions, syrup, resin, and more—especially mid-to-high viscosity liquids.
✔ Typical flow range is 0.1–2000L/min, with sizes from DN10 to DN100. Custom options available.
✔ Yes, with pulse output/LCD display and precision certification, suitable for gas stations and lubricant trade metering.
✔ Depending on material (aluminum, stainless steel, cast iron), size, and accuracy class, prices typically range from USD 200–1000. Please inquire for quotes.
✔ Supports 4–20mA, pulse, RS485, etc., for integration with PLC, SCADA systems.
✔ Under normal conditions, 5–10+ years. Key components are replaceable.
In today’s pursuit of efficient production and precise metering, a suitable flow meter is not only a source of data but also a key to project success.
WEIZIDOM is committed to delivering high-performance, cost-effective oval gear flow meters. We have served customers across multiple countries and projects, widely applied in oil filling, industrial transfer, food filling, and more.
If you’re looking for a high-precision flow meter suitable for your fluid, feel free to contact us for product details and quick quotations—we’ll help you find the perfect model.
Email: eileen@wsdsolution.com
Website: www.wsdsolution.com
