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Brodie Flow Meter: Sourcing Bulk Bi-Rotor Positive Displacement Fuel Systems
Quick Answer
A Brodie style bi-rotor positive displacement meter is a proven choice for bulk fuel loading, truck racks, and depot transfers that need repeatable volume totals. Silver Instruments supplies bi-rotor positive displacement fuel meters from DN50 to DN150 with pulse outputs and 4-20 mA HART. Send us your flow range in liters per minute, pipe size, pressure in bar, and fuel type for a quote.
What You Are Really Sourcing When You Search for a Brodie Flow Meter
Most engineers search for Brodie flow meter because they need a meter that can survive diesel, jet fuel, crude oil, or biodiesel in a high cycle loading station. The Brodie BiRotor design uses two interlocking rotors inside a precision housing. Each rotor pair sweeps a fixed volume per revolution. No bypass, no slipping. This is the core reason it holds calibration on fuel depots over many years. In practice, plant managers want the same mechanical principle without waiting 20 weeks for an OEM replacement. That is where we help. Silver Instruments supplies bi-rotor positive displacement fuel meters that replace Brodie B252 and B280 series in many bulk fuel applications. We build them with aluminum, carbon steel, or stainless steel housings depending on the line fluid and site environment.
Common Sizes and Specifications for Bulk Fuel Systems
The size you choose depends on the loading arm flow rate, not just the pipe size. We normally see DN80 meters on diesel loading skids running 300 to 1500 L/min. DN100 meters handle 500 to 2500 L/min at a coastal tank farm. DN150 meters work for 1000 to 4500 L/min on large bunkering lines. Standard accuracy for our SI-PD-BR series is plus or minus 0.2 percent of reading. Repeatability is 0.02 percent. That is the spec that matters for custody transfer. Operating pressure ratings cover ANSI 150, 300, and 600 flanges. Temperature range is -20 °C to 120 °C. Fluid viscosity can go up to 1000 cP. These are not lab numbers. We have seen fuel at 3 cP move through a DN80 meter at 900 L/min without cavitation or rotor chatter.
Output Signals and Controls You Should Specify
A bare mechanical register is not enough for most sites in 2025. You need pulse output to a PLC or batch controller. You also need 4-20 mA HART for the SCADA screen. We can supply dual pulse outputs with a pulse resolution of 100 pulses per liter. The HART output gives flow rate, totalizer, and diagnostic variables. Modbus RTU is an option if your terminal uses a remote IO network. For hazardous areas, we quote Ex db IIB T4 or Ex d IIB T4 enclosures. Some sites in Malaysia and Nigeria ask for ATEX and IECEx certification. We supply both. The meter does not need external power for the mechanical register. But if you want HART and pulse, you need 24 V DC loop power.
Where We Have Seen These Meters in the Field
Here is the thing. Fuel terminals are more demanding than water or chemical lines. The meter has to start fast, stop fast, and hold totalizer data between batches. We shipped six DN80 bi-rotor meters to a diesel depot in Cikarang, Indonesia last year. They run on truck loading
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Checklist Before You Send an Inquiry
Do not just send a photo of the nameplate and ask for price. Most engineers skip this part and lose three days in back and forth. Send us these five values. One, fuel type and viscosity in cP. Two, minimum and maximum flow rate in L/min or m3/h. Three, line pressure in bar and temperature in Celsius. Four, pipe size and flange standard. Five, required output signal. The pipe size matters less than the flow range. We often recommend a smaller meter that operates in the upper 70 percent of its flow range instead of a larger meter that barely moves. Because a larger meter at 10 percent flow loses accuracy and wears the bearings faster. That is the difference between a good quote and a cheap quote.
FAQ
Can these meters handle both diesel and jet fuel at the same site?
Yes. You can use the same bi-rotor meter body for diesel, jet fuel, kerosene, and light crude if you choose PTFE or FFKM seals and compatible rotor materials. The calibration factor changes slightly with viscosity. We can set the pulse output accordingly.
What is the lead time for a DN80 bi-rotor fuel meter?
For standard aluminum or carbon steel meters with ANSI 150 flanges, lead time is 7 to 14 days. Stainless steel bodies and ANSI 600 flanges may take 20 to 30 days. We keep DN50 and DN80 standard units in stock for urgent loading rack replacements.
Do I need ATEX or IECEx certification for a diesel loading skid?
If your loading area is classified Zone 1 or Zone 2, yes. We quote Ex d or Ex db certified models for diesel and jet fuel terminals. Always send the hazardous area classification from your site drawing. It avoids rework and extra freight costs.
What is the difference between a bi-rotor meter and an oval gear meter for fuel?
Bi-rotor meters have a larger clearance between the two rotors. They handle higher flow rates and larger particles better than oval gear meters in bulk fuel lines. Oval gear meters work well for low flow and high viscosity chemicals. For truck loading at 800 L/min, bi-rotor is the safer choice.
How do I get a price for a Brodie style bi-rotor meter?
Send us your fuel type, flow range in L/min, pipe size, pressure, temperature, and required approvals. Use the contact details below. We reply within 24 hours with a model recommendation and formal quotation.
Contact Silver Instruments for a Bulk Fuel Meter Quote
For a bi-rotor positive displacement fuel meter price, contact our sales team. Tel: +86-135-1213-1526. Whatsapp: 86-135-12131526. WeChat: +86 13512131526. Send your flow range, pressure in bar, temperature in Celsius, and pipe size. We will quote the right DN size and output configuration without guesswork.
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