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Quick Answer: For reliable monitoring of biodiesel fuel flow to a boiler at 100 L/h, Silver Automation Instruments recommends an oval gear positive displacement flow meter with 4-20 mA HART output and PT100 temperature compensation. The technical manual includes wiring for hazardous area Zone 1, pulse scaling for PLC, and a viscosity correction chart for B100 biodiesel. This setup captures real-time consumption data and feeds directly to your boiler control room or energy management system.
Biodiesel Flow Meter 100 L/h Boiler Fuel Monitoring – Manuals and Selection Guide
Why an Oval Gear Meter for Biodiesel Boiler Fuel
Biodiesel, especially B100, has a lubricity film and viscosity typically between 4 and 6 cSt at 40 degrees C. These properties cause slippage in turbine flow meters, especially at low flow rates like 100 L/h. Oval gear meters are positive displacement, so they trap and count every droplet. No bypass, no slippage. Here is the thing: a turbine meter installed on a biodiesel line in a Philippine power plant gave readings 12 percent low because of viscosity shift. After replacing with an oval gear meter, the boiler fuel accounting matched the tank stick readings exactly.
Specifications for a 100 L/h Biodiesel Boiler Monitor
At 100 L/h, you move roughly 1.67 liters per minute. Pipe sizes are usually DN10 or DN15. We recommend the Silver Instruments SO-15 oval gear flow meter with cast iron or stainless steel 304 body. Pressure rating is PN16, and the standard temperature limit is 120 degrees C. Accuracy is plus minus 0.5 percent of reading across a 10:1 turndown. The output can be pulse with 1 pulse per milliliter, or 4-20 mA with HART protocol. The manual lists the K-factor table so your PLC or paperless recorder calculates flow and total. For boiler rooms in remote areas, a lithium battery powered totalizer can run for 3 years without wiring. The meter can also be built with ATEX Zone 1 certification for solvent-rich atmospheres.
What You Will Find in the Instruction Manual
The manual is not just a wiring diagram. It includes dimension drawings for inline mounting, explosion proof gland installation, menu settings for the integral totalizer, and a step-by-step air purge procedure. A dedicated section covers biodiesel cleaning cycles because B100 can act as a solvent and drag old tank residue. We show how to install a 100-mesh strainer upstream and how to clean it. For temperature compensated flow, the manual gives wiring for a PT100 sensor and settings to scale the 4-20 mA output to mass flow in kg/h using a fixed density. Most engineers skip the commissioning checks, but the manual has a 5-minute verification routine using a stopwatch and a graduated cylinder. Do not skip that.
Real World Installation Notes from Boiler Projects
In practice, many boiler installations in Vietnam and Indonesia mount the flow meter right after a gear pump. The flow pulsation can cause the oval gears to hammer and give erratic readings. We always recommend a pulsation dampener or a flexible hose section upstream. Another tip: steam tracing on biodiesel lines is common. Keep the flow meter body below 120 degrees C. If your line goes higher, ask for a high temperature version with separate amplifier. We have seen a customer
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Case in Point – Sumatran Palm Oil Mill Tracks Boiler Biodiesel
Last year, an engineer at a palm oil mill in Riau, Sumatra, contacted us through WhatsApp. Their task: monitor B100 biodiesel consumption for a 3-ton fire tube boiler making steam for the kernel drying process. Average flow was 80 to 120 L/h. They had tried a variable area meter but could not get remote reading. We supplied two SO-15 oval gear meters with 4-20 mA output and integrated PT100 probes. The signals went to a Silver Instruments paperless recorder, and the daily fuel report now prints automatically. The plant saved 8 percent on biodiesel procurement over six months because they spotted leakage during idle boiler mode.
FAQs on Biodiesel Flow Meter 100 L/h and Boiler Fuel Manuals
Can the oval gear flow meter handle B100 biodiesel at room temperature and low flow?
Yes. B100 viscosity around 4 to 6 cSt fits the ideal range for oval gear meters. At 100 L/h, a DN15 meter operates far from its minimum threshold. The accuracy remains 0.5 percent, and the PT100 correction option adjusts for density changes from 0.87 to 0.90 kg/liter if needed for mass total. No bypass, no vapour lock if you vent the line properly.
Does the manual include ATEX Zone 1 wiring and certification details?
It does. The manual contains wiring diagrams for intrinsically safe circuits with barriers, cable gland recommendations, and the ATEX certification number for the sensor version. Zone 1 IIB T4 models are standard in our biodiesel flow meter offering. You can also request the IECEx additional certification for projects in Australia and Middle East.
How do I connect the flow meter to a boiler PLC or energy monitor?
Use the pulse output for totalization. The manual gives K-factor values, for example 1 pulse equals 1 milliliter. Set your PLC high speed counter accordingly. The 4-20 mA scaled to 0 to 150 L/h gives continuous flow rate. Both signals can go to a remote display or a paperless recorder. We assist with Modbus RTU mapping for customers in Saudi Arabia and Malaysia who integrate into DDC boiler controllers.
What maintenance routine does the manual suggest for biodiesel service?
B100 biodiesel cleans the pipe but carries debris. Install a 100-mesh Y strainer immediately upstream. Clean the strainer weekly during the first month, then monthly. The manual details how to open the measuring chamber without disconnecting the process piping. There is also a procedure to flush the meter with diesel if the boiler stops for more than two weeks to prevent sticky varnish buildup.
How do I get the right flow meter model and manual for my boiler project?
Send us the biodiesel type (B100, B20, etc.), operating pressure in bar, temperature in degrees C, pipe size DN, and flow range (minimum, normal, maximum). We will select the correct oval gear meter, confirm the K-factor, and provide the full installation and operation manual. Request a quotation by email or through the contact form on flow-meter.com.au. Typical reply time is within 24 hours for Australia, Southeast Asia, and Middle East inquiries.