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heavy fuel oil flow meter 1 inch
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heavy fuel oil flow meter 1 inch
# Heavy Fuel Oil Flow Meter 1 Inch: Selection Guide and Technical Specifications
## Quick Answer
For heavy fuel oil (HFO) applications with a 1 inch pipe size, oval gear flow meters and Coriolis mass flow meters are the most reliable options. Oval gear meters handle high viscosity up to 100,000 cP, while Coriolis meters provide direct mass measurement without needing temperature compensation. Both work with 4-20 mA HART output for remote monitoring.
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## Why Heavy Fuel Oil Needs a Special Flow Meter
Heavy fuel oil is not like water or diesel. It has high viscosity, often 50 to 700 cP at operating temperature. It can go up to 3,000 cP when cold. A standard turbine or vortex flow meter will struggle with this. The oil is thick, sticky, and sometimes contains particles.
We have seen customers in Singapore, Indonesia, and Nigeria try to use electromagnetic flow meters for HFO. That fails because HFO is non-conductive. The meter reads zero or gives erratic signals. The right choice starts with understanding the fluid properties.
Heat the oil before it enters the meter. Most 1 inch HFO systems operate at 60 to 90 °C to reduce viscosity. Your flow meter must handle this temperature. Check the meter body material. Cast iron or carbon steel with PTFE lining works. Aluminum does not last.
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## Best Flow Meter Types for 1 Inch HFO Lines
### 1. Oval Gear Flow Meters
Oval gear meters are positive displacement devices. Two oval gears rotate as fluid passes through. Each rotation equals a fixed volume. The meter counts rotations to give total flow.
**Why it works for HFO:**
- Measures high viscosity fluids directly
- No need for straight pipe runs
- Accuracy ±0.5% of reading on v
iscous fluids
- Works with 4-20 mA HART or pulse output
**Limitations:**
- Moving parts wear over time
- Pressure drop across the meter
- Not for fluids with large solids
For a 1 inch HFO application, typical range is 20 to 200 L/min. At Silver Instruments, we recommend our model SIOG-025 for this size. DN25 flange connection, rated PN16 or PN40. Temperature range -20 to +120 °C. ATEX Zone 1 available for hazardous areas.
A customer in Malaysia runs a palm oil processing plant. They use our oval gear meter for HFO feeding their boiler. The oil is 180 cP at 80 °C. The meter has been running for 18 months without issues.
### 2. Coriolis Mass Flow Meters
Coriolis meters measure mass flow directly. Two vibrating tubes sense the Coriolis effect. The phase shift between inlet and outlet gives mass flow.
**Why it works for HFO:**
- No moving parts, low maintenance
- Direct mass measurement, no temperature or density compensation needed
- Measures both flow and density
- Accuracy ±0.1% to ±0.2% of reading
**Limitations:**
- Higher cost than oval gear
- Pressure drop at low flow
- Larger physical size for same pipe diameter
For 1 inch HFO, our model SIMC-015 fits. DN15 flange connection. Flow range 0 to 2,500 kg/h. Measures density from 0.3 to 3.0 g/cm³. Temperature up to 150 °C. ATEX Zone 1 option.
Last year a customer in Vietnam asked us for a meter on a 1 inch HFO line feeding a marine engine. They had temperature fluctuations from 50 to 90 °C. A Coriolis meter solved the problem because mass flow stays accurate regardless of temperature changes.
### 3. Thermal Mass Flow Meters
Thermal meters use heat dissipation to measure flow. They work only for gases. Do not use them for HFO liquids. Some engineers ask about the『SILVER Official Website SERVICE』
User:flowgauge6b5bdLast Time:07/24/2026
