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Heavy Fuel Oil Flow Meter DN150 Heating Jacket System Layouts
Quick Answer: For heavy fuel oil service on DN150 pipes, a heated positive displacement or Coriolis flow meter with an integral jacket delivers repeatable mass flow data at ±0.5% of rate or better. The layout must include a Y-strainer, a bypass loop, a PT100 sensor in the meter body, and a drain valve. Silver Automation Instruments ships complete DN150 HFO metering packages with steam or electric jackets, ATEX certification, and 4-20 mA HART outputs.
Why a Heating Jacket Matters for DN150 HFO Flow Meters
Heavy fuel oil can reach 700 cSt at 50°C. Without heat, the oil solidifies inside the meter and blocks moving parts. A jacket keeps the measuring chamber at 80 to 120°C. For DN150 oval gear meters we recommend a steam jacket with 2-inch flanged connections and saturated steam at 3 bar. For sites without steam we offer electric heating jackets with RTD control and PID feedback. In practice, many power plants in Southeast Asia use steam from the boiler to trace the HFO line. A site in the Philippines had an unheated turbine meter that clogged every two weeks. After they switched to our heated oval gear meter, the cleaning cycle extended to six months.
Components of a Reliable DN150 HFO Metering Layout
A typical layout starts at the HFO day tank. A screw pump sends oil through a 60-mesh Y-strainer directly into the heated flow meter. The meter body holds a PT100 that outputs a 4-20 mA signal to the control room. A local indicator shows kg/h and totalized mass. After the meter, a check valve prevents backflow to the burner manifold. A bypass line around the meter lets maintenance happen without stopping the boiler. Insulate the inlet and outlet flanges, add a steam trap on the jacket return, and install a drain valve at the lowest point. This layout works for bunker transfer, fuel blending, and burner feed on marine and industrial sites.
Oval Gear vs. Coriolis for Heated DN150 HFO Service
Oval gear meters handle high viscosity at a lower cost. Coriolis meters give mass flow and density with no moving parts but cost more. With heavy fuel oil that has suspended solids, oval gear meters prove more rugged. A marine fuel supplier in Panama selected our DN150 oval gear meter with steam jacket for bunker loading. They needed a mechanical totalizer and local display without external power. For custody transfer at an oil terminal in Nigeria we supplied a Coriolis meter with heating jacket and OIML approval. Both work well if the jacket is sized to match the oil pour point and ambient temperature. The main difference is the budget and the need for direct mass versus volumetric total.
Installation Tips for DN150 Heating Jacket Flow Meters
Install the meter in a vertical pipe with upward flow. This orientation avoids air pockets that can damage gears or affect oscillation. Oval gear meters need no upstream straight run, but allow 3 DN to fit the strainer. Steam jacket connections must be on top and bottom to drain condensate. Use a steam trap and a vacuum breaker on the return. For electric jackets set the PID controller to a
Typical Specifications for a Silver Instruments DN150 HFO Flow Meter Package
We supply model SOG-150-H-JKT for oval gear or SCM-150-H-JKT for Coriolis. Flow range reaches 250 m³/h. Viscosity range spans 10 to 1000 cSt. Jacket options: steam at 3 bar and 140°C, or electric at 230/400 V and 2.5 kW. Accuracy is ±0.5% of reading for oval gear and ±0.1% for Coriolis. Outputs include 4-20 mA HART, pulse, and Modbus RTU. Body material: 316L with PFA liner for the oval gear; 316L for the Coriolis tubes. Flanges are DN150 PN16 or ANSI 6-inch 150# RF. Explosion proof: ATEX II 2G Ex db IIC T4 Gb. Every package leaves our factory with a calibration certificate traceable to ISO 17025.
Frequently Asked Questions
Can I use a heating jacket on an existing DN150 flow meter not originally ordered with one? Some oval gear meters accept aftermarket electric jacket kits. Steam jackets need cast-in channels inside the body, so retrofit is not possible. Order the meter with the jacket factory-installed for best results. Silver Instruments can add an electric jacket to certain DN150 oval gear models if the body design allows it.
What is the maximum steam pressure for the heating jacket? Our standard jacket handles 6 bar saturated steam at 165°C. For higher pressure we supply a reinforced jacket rated to 10 bar. Always connect a steam trap and a vacuum breaker on the return line. The jacket connection is 1-inch NPT for steam inlet and ¾-inch for condensate outlet.
How do I size the electric heating jacket wattage for a DN150 meter? For a meter exposed to 0°C ambient wind we use a 2.5 kW jacket with PID control. If the oil viscosity stays above 500 cSt at 50°C and ambient drops below -10°C, a 3.5 kW jacket is safer. Send us the minimum ambient temperature, oil pour point, and flow rate. Our engineers calculate the heat loss and recommend the correct wattage.
Can the jacket be used with thermal oil instead of steam? Yes. The jacket works with hot oil up to 200°C. Use thermal oil connections that match DIN or ANSI flanges. The oil must flow in a closed loop with a heating unit and a circulation pump. Keep the flow velocity moderate to avoid hot spots.
Do you supply the full DN150 HFO metering skid with bypass and strainer? Yes. Silver Automation Instruments builds skid-mounted packages with the flow meter, Y-strainer, isolation valves, pressure transmitter, RTD, and a local display. We deliver a P&ID, wiring diagram, and a pressure test report. You connect the HFO lines and power supply. The skid is tested with hot oil before shipment.
To get a quote for a DN150 heavy fuel oil flow meter with heating jacket, send us your pipe size (DN150), fuel viscosity in cSt, operating temperature in degrees Celsius, flow range in kg/h or m³/h, and preferred output. Our team replies within 24 hours with a full technical proposal and a competitive price.
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