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heavy fuel oil flow meter 2 inch
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heavy fuel oil flow meter 2 inch
# Heavy Fuel Oil Flow Meter 2 Inch: Selection, Specifications, and Pricing
## Quick Answer
For heavy fuel oil (HFO) at 50–200°C with viscosity up to 700 cSt, a 2 inch Coriolis mass flow meter from Silver Instruments provides ±0.1% accuracy and direct mass measurement without temperature compensation. If your budget is tighter and viscosity stays below 100 cSt, a 2 inch oval gear flow meter works well at around one-third the cost. Send us your pressure (bar), temperature (°C), and flow range to get a quote for your specific HFO application.
## Why Heavy Fuel Oil Is Difficult to Measure
Heavy fuel oil is not like water or light diesel. It behaves differently at different temperatures. At 40°C, HFO can be as thick as 700 centipoise. At 120°C, it drops to around 30 cP. This viscosity swing causes problems for many flow meter types.
Most engineers in Southeast Asia and the Middle East learn this the hard way. A customer in Indonesia tried using a standard 2 inch turbine meter for HFO bunkering. The meter worked for three weeks. Then the viscosity changed with the batch from a different supplier, and the reading drifted by 12 percent. The calibration was useless.
We have seen this on customer sites many times. The solution is either a positive displacement meter that measures actual volume, or a Coriolis meter that measures mass directly.
## Flow Meter Options for 2 Inch HFO Lines
### 2 Inch Coriolis Mass Flow Meter
This is our top recommendation for HFO. The reason is direct mass measurement. When you burn HFO in a marine engine or a industrial boiler, you care about the energy content by mass. Volume changes with temperature and density. Mass does not.
The Silver Instruments 
Coriolis flow meter in 2 inch size handles:
- Flow range: 2,000 to 30,000 kg/h
- Pressure rating: up to 100 bar
- Temperature: -50°C to +200°C standard, +350°C optional
- Accuracy: ±0.1% for liquids
- Output: 4-20 mA HART, pulse, Modbus RTU
A 2 inch Coriolis meter costs around USD 1,800 to 3,500 depending on the material. For HFO, we recommend 316L wetted parts with Hastelloy options if sulfur content is high.
One thing most suppliers do not tell you. The Coriolis meter measures density in real time. That is useful for HFO because you can detect water contamination or blend changes without a separate densitometer.
Last year a shipping company in Singapore bought six units for their bunker barges. They reported that the previous mechanical meters had a 0.5 percent drift per month. The Coriolis units held accuracy for over twelve months with zero recalibration.
### 2 Inch Oval Gear Flow Meter
If your HFO is preheated above 60°C and viscosity stays below 100 cP, the 2 inch oval gear meter is a solid choice. It is a positive displacement device. Each rotation of the oval gears displaces a fixed volume. This gives ±0.5 percent accuracy even with changing viscosity.
The Silver Instruments oval gear flow meter for HFO includes:
- DN50 / 2 inch flanged connections
- Flow range: 1,000 to 20,000 L/h
- Max viscosity: 5,000 cP (realistically 100 cP for sustained accuracy)
- Temperature: up to 150°C
- Pulse output and 4-20 mA options
A 2 inch oval gear meter costs USD 600 to 1,200. This makes it attractive for smaller operations in Africa and Latin America where budget is tight.
But there is a catch. The gears wear faster with abrasive particles. Heavy fuel oil from some refineries contains cat fines and other solids. We reco『SILVER Official Website SERVICE』
User:ultrasonicflowmeterbdf97Last Time:07/24/2026
