heavy fuel oil flow meter DN25

『heavy fuel oil flow meter DN25』Related information(flow rotameter|digital flow meter|balo meter|hydraulic flow meter|volumetric meter|positive displacement meter|pitot tube flow meter|displacement meter|cfm meter|variable area flow meter|inline flow meter|differential pressure flow meter|calibrated flow meter|velocity meter|paddle wheel flow meter|oval gear flow meter|anemometer hvac|multiphase flow meter|doppler flow meter|thorpe tube flowmeter|heat flow meter)

# Oval Gear Flow Meter for Diesel: Working Principle, Accuracy, and Selection Guide **Quick Answer:** Oval gear flow meters measure diesel flow with ±0.5% accuracy by trapping fixed volumes of liquid between rotating oval gears. They work with diesel viscosity from 2 to 500 cP at temperatures up to 120°C. For diesel transfer or batching, choose a meter with Hastelloy gears and PTFE seals. Send us your flow rate (L/min), line pressure (bar), and diesel temperature to get a quote. --- ## What Is an Oval Gear Flow Meter? An oval gear flow meter is a positive displacement meter. Two oval gears rotate inside a chamber. Diesel flows into the meter, pushes the gears, and each rotation traps a precise volume of liquid. The gears spin, and the meter counts each rotation. This gives you a direct reading of total volume. The principle is simple. No turbine blades. No electromagnetic coils. Just mechanical gears moving diesel from inlet to outlet. That reliability matters for diesel because diesel has lubricity. It keeps the gears running smoothly. Most engineers skip this part: oval gear meters are not velocity meters. They measure actual volume passing through, not speed of flow. This means density and viscosity changes do not affect accuracy. For diesel that changes temperature from winter to summer, this is a big advantage. ## Why Oval Gear Meters for Diesel? Diesel is not water. It has viscosity. At 20°C, diesel viscosity is around 2 to 4.5 cP. In cold climates, it can reach 10 cP. At 40°C, it drops to 1.5 cP. That viscosity range is fine for oval gear meters. In fact, oval gear meters work better with viscous liquids. We have seen this on customer sites many times. A paint manufacturer in Indonesia used a turbine mete heavy fuel oil flow meter DN25

r for diesel. The turbine blades wore out in six months. They switched to an oval gear meter. That meter is still running after three years. Here are the reasons oval gear meters fit diesel applications: **No straight pipe required.** You do not need 10 diameters upstream. Oval gear meters install anywhere. This helps on skids or in tight piping. **Reliable at low flow.** Diesel systems often run at low flow for topping off tanks. An oval gear meter maintains accuracy at 10% of maximum flow. Turbine and electromagnetic meters struggle below 20% of range. **Resistant to contamination.** Diesel contains dirt, water, and microbes. Oval gear meters have wide clearances. Particles up to 100 microns pass through without jamming. ## Key Technical Specifications To pick the right meter, you need the numbers. Here are the specifications we use at Silver Instruments for diesel applications. ### Accuracy Standard accuracy is ±0.5% of reading. For diesel dispensers, we offer ±0.2% with pulse output. **Repeatability:** ±0.05%. This matters for batching and filling. ### Flow Range | Meter Size | Min Flow (L/min) | Max Flow (L/min) | Max Pressure (bar) | |------------|------------------|------------------|---------------------| | DN15 | 0.6 | 25 | 40 | | DN20 | 1.2 | 50 | 40 | | DN25 | 2.5 | 100 | 40 | | DN40 | 5.0 | 200 | 30 | | DN50 | 10 | 400 | 30 | For diesel tanker loading, we often recommend DN40 or DN50. For drum filling, DN15 is enough. ### Material Options The meter bod

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