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Jet Fuel Flow Meter 1/2 Inch: Perfecting Flow Measurement on Test Stands
Quick Answer: For jet fuel test stands, a 1/2 inch (DN15) Coriolis mass flow meter from Silver Automation Instruments gives you direct mass flow reading with ±0.1% accuracy. It removes the drift and maintenance pain of turbine or gear meters. Install one to measure Jet A-1 from 0.5 to 500 kg/h with no density compensation and no wear parts in the fuel path.
Why 1/2 Inch Meters Fit Jet Fuel Test Stands
Test stands for fuel pumps, injectors, and APUs run on precise flow loops. A 1/2 inch line size matches the typical fuel circuit of small to mid-size aircraft components. Most engineers skip oversized meters because they kill low-flow resolution. A DN15 Coriolis sensor can resolve down to 0.1 kg/h, which matters when you profile injector opening points. In practice, kerosene-based Jet A fuel at 20°C has a viscosity around 1.5 cP and the meter does not care. Silver Instruments builds the SILVER CORI-MASS series with small bore tubes specifically for hydrocarbon test benches.
Coriolis Mass Flow vs. Mechanical Meters on Jet Fuel
Turbine meters were the old standard. But they wear fast on dry jet fuel with poor lubricity. The bearings in a turbine meter exposed to continuous test duty can drift 1 to 2% within six months. We have seen this on customer sites many times. That drift ruins pass criteria for engine calibration. Positive displacement oval gear meters also suffer because fuel without lubricant accelerates gear wear. Here is the thing: a Coriolis meter has no moving parts in the fuel stream. It measures mass flow directly. You skip density correction when fuel temperature swings from 18°C in the morning to 35°C in the afternoon inside a hangar. The signal stability means your test stand data stays repeatable year after year.
Installation and Outputs for Test Stand Integration
Mount the 1/2 inch meter rigidly with BSPP or NPT threads. Flange connections are optional. You do not need long straight pipe runs. The transmitter outputs 4-20 mA HART, pulse, and Modbus RTU, which drops right into PLC or data loggers. For explosive atmospheres where jet fuel vapours collect, we supply ATEX Zone 1 and IECEx certification. The secondary containment burst pressure is 100 bar. Even in a test cell with hot engine parts, fuel stays contained if a tube ever fails. The meter also carries a local display and can output net mass total, a feature engineers often use for batch fuel consumption tests.
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Technical Specifications at a Glance
Flow range: 0.5 to 600 kg/h. Accuracy: ±0.1% of rate for liquids. Repeatability: ±0.05%. Wetted parts: 316L stainless steel. Process temperature: -40 to +125°C. Maximum pressure: 100 bar. Power: 24 VDC. Outputs: 4-20 mA HART, pulse, Modbus RTU. Meter weight: 7 kg. Process connection: 1/2 inch BSPP or NPT, with flange adapters available. Ingress protection: IP66/67. Hazardous area approval: ATEX Zone 1, IECEx. Calibration: 5-point traceable, with certificate included in the box.
FAQ
Can the 1/2 inch meter handle Jet A fuel with anti-icing additives? Yes. The 316L wetted parts resist corrosion from typical additives like DiEGME or Prist. No coating or special treatment is required.
What is the turndown ratio on a DN15 Coriolis meter for jet fuel? The meter delivers 20:1 turndown on kerosene while staying within accuracy spec. You can measure as low as 0.5 kg/h with good repeatability.
Does the meter require straight pipe runs upstream? No. Unlike turbine or orifice meters, Coriolis mass flow meters do not need flow conditioning. Install it directly before or after an elbow if space is tight.
Can we use this meter in an ATEX Zone 1 test cell? Absolutely. Silver Instruments supplies intrinsically safe or explosion-proof versions marked Ex ia IIC T4 or Ex d IIC T6. Mention your zone requirement when you request a quote.
How do we calibrate the flow meter for jet fuel test stand traceability? Every meter leaves our factory with a 5-point traceable calibration on a hydrocarbon reference standard with viscosity matching Jet A-1. Field verification is possible with a master meter or prover system. We also offer annual recalibration service from our facility.
To get a specific quote for your test stand, send us your flow range in kg/h, operating pressure in bar, process temperature in °C, pipe size (DN), and hazardous area classification. Our engineers will recommend the right 1/2 inch Coriolis meter configuration and provide a delivery time for your location.
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