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Flaxseed Oil Flow Meter for Nutritional Supplement Bottling Layouts
Quick Answer
Positive displacement oval gear meters and Coriolis mass flow meters give the best repeatability for flaxseed oil filling in nutritional supplement lines. Silver Automation Instruments supplies food-grade oval gear meters for simple volumetric control and Coriolis meters when you need direct mass measurement of oils with viscosity from 40 cP to 200 cP. Pair each filling head with a dedicated meter or use one meter with a distribution manifold, depending on your line speed and bottle size.
Why the Right Flow Meter Matters for Flaxseed Oil
Flaxseed oil is sensitive to shear, temperature, and oxidation. A bottling line that overfills by 2 ml per unit loses thousands of dollars in product over a year. On the other hand, underfilled capsules or bottles trigger regulatory non-compliance in markets like Australia, Saudi Arabia, and Brazil. Most engineers skip this part. They pick a general turbine meter and then face drift when oil viscosity changes at different batch temperatures. A positive displacement meter like an oval gear meter ignores small viscosity swings and keeps volumetric accuracy within 0.5 percent. A Coriolis meter goes further by measuring mass directly, which matters when you sell by weight rather than volume.
Two Flow Meter Options for Supplement Bottling
For small bottle sizes from 100 ml to 1 liter, oval gear meters from our OMG series handle flaxseed oil without bypass. The OMG-DN15 model with pulse output threads directly into a filling nozzle and sends one pulse per 0.1 ml, making it simple for a PLC to count pulses and stop the fill. In practice, a softgel manufacturer in Vietnam uses ten OMG-DN15 meters on a ten-head rotary filler for 500 mg softgels. Each meter delivers a repeatability of ±0.3 percent at 25 degrees Celsius oil temperature.
When you bottle larger containers, like 500 ml to 5-liter bottles, or the oil temperature exceeds 60 degrees Celsius, a Coriolis mass flow meter becomes the safer choice. Our CMF025 meter, with DN15 connections and 316L stainless steel wetted parts, can be cleaned in place and handles oil density changes without recalibration. A supplement plant in Thailand replaced its electromagnetic meter with a CMF025 because the oil contained tiny air bubbles that disturbed the magnetic signal. Now the plant gets a stable 4-20 mA HART output and bottles oil by kilogram, not by liter.
Bottling Layout Considerations for Nutritional Supplement Lines
A common layout uses a single main supply line from the storage tank to a manifold, then individual branches to each filling head. In this setup, you can install one master flow meter before the manifold for total batch control and smaller meters at each head for individual stroke control. Because flaxseed oil oxidizes quickly, every meter and fitting should have an EPDM or PTFE seal approved by FDA or EU 1935/2004. Silver Automation Instruments can supply oval gear meters with EPDM seals and Coriolis meters with 1.4404 stainless steel tubes and sanitary tri-clamp connections.
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Silver Instruments Product Match and Specifics
For a standard flaxseed oil filling line running 20 to 30 bottles per minute, we typically recommend one OMG-DN10 or DN15 oval gear meter per filling head. The OMG meter can output a pulse signal to your PLC or use an optional 4-20 mA converter. When oil temperature stays above 40 degrees Celsius, we add a PT100 temperature sensor to the meter body for local display. Metal rotors are standard, but if your oil contains very fine sediment, we can supply PPS rotors to reduce wear.
For high-speed lines above 50 bottles per minute or for softgel encapsulation machines that need ultra-precise dosing, the CMF006 or CMF010 micro Coriolis meter measures flows as low as 1 kg/h with 0.1 percent accuracy. This allows you to fill a 1000 mg softgel with approximately 0.7 ml of flaxseed oil and a typical deviation of only 2 mg. We have delivered this solution to an SME in Mexico that exports nutritional supplements to the United States.
Send us your oil temperature in degrees Celsius, oil viscosity in cP, filling volume per container, number of filling heads, and pipe size (DN). We will select the meter type, seal material, and output signal to match your bottling layout exactly.
FAQ
Does flaxseed oil cause oval gear meters to jam? Not with the correct rotor clearance. We set clearance at 0.05 mm to 0.1 mm for oil viscosities around 50 cP. The meter stays smooth, and occasional polymerized oil particles pass through without seizing.
Can one flow meter serve multiple filling heads? Yes, if you place it on the main supply line and all heads share a consistent back pressure. But individual meters per head give better per-bottle weight control, especially when you record data per nozzle for quality audits.
What material seals are safe for flaxseed oil? EPDM and PTFE. EPDM works well up to 80 degrees Celsius and resists oxidation from unsaturated oils. PTFE suits higher temperatures and aggressive cleaning agents. Avoid Buna-N seals because flaxseed oil can swell them over time.
How do we clean the meter between batches? Oval gear meters with tri-clamp connections can be disassembled in under two minutes. Coriolis meters support CIP. Flush with warm water at 60 degrees Celsius, then a food-grade solvent flush for oil residue. Dry nitrogen purge helps prevent oxidation inside the meter.
Do you provide I/O testing before shipment? Silver Automation Instruments tests every meter with a similar viscosity oil at your specified flow range. We send a test report with pulse accuracy curves and a configuration sheet. Our team can also join a video call to walk through field wiring with your local electrician.

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