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Low Flow Meter For Fuel Additive Ml/Min Target Ratios
Quick Answer: To hit ml/min target ratios for fuel additives you need a meter that ignores viscosity swings and handles low flows without drift. Coriolis mass flow meters and oval gear flow meters from Silver Instruments deliver ±0.2 percent accuracy down to 0.5 ml/min. For a fast quotation send us your additive type, target ml/min range, operating temperature in degrees C, and pipe size in DN.
The Challenge of Accurate Fuel Additive Dosing
Fuel additives are high-cost chemicals. A 200-litre drum of polyisobutylene amine (PIBA) detergent can cost over 3,000 USD in the Middle East market. Overdose by just 5 percent and a blending plant in Oman wastes 150 USD per drum. Underdose by 3 percent and diesel injector fouling returns within 5,000 kilometres. Old turbine meters drift when viscosity changes from 2 cP to 12 cP. Positive displacement meters with mechanical registers cannot output 4-20 mA HART to a PLC. Engineers in Vietnam and Indonesia often tell us their existing small flow meters skip pulses below 20 ml/min. That blind spot makes target ratio control impossible.
Meter Technologies for Low Flow Additive Injection
For liquid fuel additives we focus on two technologies that work on real injection skids. Coriolis mass flow meters from our CMF-DW series measure mass directly. They ignore density and viscosity shifts. A DN2 or DN3 micro-bend tube handles 1 to 200 ml/min with 316L wetted parts and PTFE seals. The output is mass flow in kg/h and volumetric flow in ml/min, both from one device. Oval gear meters from our OGM series are simpler. A pair of oval rotors displace a precise volume per pocket. When you dose polyalphaolefin (PAO) lubricity additive at 30 to 80 ml/min, an OGM-DN4 with PPS gears and 4-20 mA HART transmitter works reliably. One Indonesian fuel terminal replaced a turbine meter with our OGM-DN6 after viscosity spikes caused reading errors.
Thermal mass flow meters are not our first choice for liquid additives because they depend on heat capacity. For gaseous additives like methane tracer injected at low ml/min equivalent, we do supply inline thermal mass meters with ATEX Zone 1 certification.
Real-World Installation: Diesel Lubricity Additive at 50 ml/min
A diesel distributor in Saudi Arabia needed to inject fatty acid methyl ester (FAME) lubricity additive at a fixed 50 ml/min into a main diesel line running at 300 litres/min. The additive viscosity was 6 cP at 25 degrees C. Pipe size was DN10 for the additive line. They asked for an ATEX Zone 1 meter with 4-20 mA HART output to close a PID loop on an Allen-Bradley PLC. We supplied a CMF-DN3 Coriolis mass flow meter with 316L measuring tube, PTFE lining, and Ex ia IIC T4 certification. The setup achieved ±0.1 ml/min repeatability. After six months zero drift was under 0.05 percent of rate. The plant manager in Dammam confirm
Key Parameters for Specifying a Low Flow Additive Meter
Most engineers skip the fluid property check. In practice we have seen this on customer sites many times. Always provide the additive viscosity at the injection temperature. A meter calibrated for 5 cP water will misread 8 cP lubricity additive by 3 to 5 percent. Tell us the real viscosity in cP. Pipe size is often DN3, DN4, DN6, DN10. Pressure drop at 50 ml/min through a DN2 Coriolis meter is under 0.5 bar, but verify with your pump head. Temperature range matters because PTFE seals soften above 120 degrees C. We need the min and max flow rates in ml/min. A 1:10 turndown is easy, a 1:50 turndown may need a Coriolis meter instead of oval gear. Output preference is almost always 4-20 mA HART. Some sites add a pulse output for totalisation. Hazardous area classification is ATEX Zone 1 or Zone 2. Give us the zone and gas group. We ship meters with certificate and stainless steel tag plate.
Why Silver Automation Instruments
We have been shipping low flow additive meters to 15 countries. Our stock includes DN2 to DN10 Coriolis meters and DN4 to DN25 oval gear meters. OEMs in Vietnam integrate our meters into skids for marine fuel blending. A paint manufacturer in Southeast Asia uses our OGM-DN6 to dose anti-skinning additive into ink solvents. Orders under 10 units ship from our warehouse in Australia within 5 working days. We include a factory calibration report traceable to NIST and a wiring diagram. No hidden software licenses, no proprietary cables.
To get a price and lead time, send us your additive viscosity (cP), pressure (bar), temperature (degrees C), pipe size (DN), min and max flow in ml/min, and ATEX zone if any. Email the numbers to [email protected] or fill the contact form on our website. We reply with a data sheet and quotation within 24 hours.
Frequently Asked Questions
Which flow meter is best for gasoline additive injection at 10 ml/min? For low-viscosity fluids like gasoline detergent a Coriolis mass flow meter gives better low-flow stability. Our CMF-DN2 handles 1 to 100 ml/min directly.
What is the minimum flow rate you can measure? With a Coriolis meter we can measure down to 0.5 ml/min. Oval gear meters start at 5 ml/min depending on viscosity.
Do your meters come with ATEX certification? Yes. Both Coriolis and oval gear models are available with Ex ia IIC T4 for Zone 1 and Ex nA for Zone 2.
What output signals do the meters provide? Standard is 4-20 mA HART with optional pulse output for totalisation. We can also provide Modbus RTU on some models.
How is the meter calibrated before delivery? Every meter undergoes a 5-point water calibration at 20 degrees C. For high-viscosity additives we offer optional calibration with a viscosity-matched test fluid.
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