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Cooking Oil Flow Meter 10 L/min Nutritional Supplement Line Metrics
Quick Answer
For a nutritional supplement line dosing cooking oil at 10 L/min, specify a sanitary oval gear meter or a Coriolis mass flow meter with DN15 tri-clamp connections. You will get ±0.5% accuracy, 4-20 mA HART outputs, and 316L wetted parts that meet FDA requirements. Silver Automation Instruments stocks these meters and ships to supplement plants in Vietnam, Mexico, and Australia within 2 weeks.
In practice, most supplement formulators do not need a complex meter for edible oil. A robust oval gear flow meter from our SIL-OG series handles soybean oil, coconut oil, MCT oil, or fish oil at the target 10 L/min flow point. The meter has a turndown of 0.2 to 20 L/min, so your batch controller can hit partial dosing without losing accuracy. Because oils are viscous, we use oval gears with tight clearances to keep slip errors low.
A contract manufacturer in Guatemala taught us a useful lesson last March. Their softgel line needed a sunflower oil meter at exactly 10 L/min for mixing vitamin D3. They ordered a general-purpose turbine meter and saw a 4 percent reading drift after 6 weeks. The oil built a thin film on the bearing surfaces and the rotor lost its linearity. We replaced it with a DN15 oval gear meter in 316L with PTFE seals. The meter has been running for 11 months now and the maintenance team only wipes the clamp joints during CIP cycles.
Here is the thing about Coriolis meters for nutritional supplement oil. If your line also demands density and temperature monitoring in one instrument, pick our SIL-CMF Coriolis mass meter. It measures mass flow directly in kg/h instead of volumetric L/min, so you avoid density compensation for different oil grades. A 10 L/min flow of coconut oil equals about 552 kg/h. The meter sends mass flow, density, and temperature over a single 4-20 mA HART pair to your PLC. Food-grade 316L tubes with 0.8 Ra surface finish are standard on these meters.
Most engineers skip the pipe sizing check and that causes trouble. For a 10 L/min oil line, DN15 tubing is correct. Inside diameter around 16 mm keeps the velocity under 1.2 m/s and avoids cavitation at low suction pressure. If your line already runs DN20 pipe, use a reducer right upstream of the flow meter. Keep 10 pipe diameters of straight run before the meter inlet. We have seen this on customer sites many times: a flow meter mounted right after an elbow gives a noisy pulse signal because of swirl.
On the metrics side, the SIL-OG oval gear meter for cooking oil gives you a pulse resolution of 0.5 mL per pulse. At 10 L/min, that delivers over 330 pulses per second, which is smooth enough for a PLC input card. The 4-20 mA analog span is set at 0 to 15 L/min for a small overrange margin. Temperature rating is -20 to 120 °C, pressure rating 40 bar, and viscosity range 2 to
Silver Instruments also supplies a two-wire version with HART protocol and a remote display that works in ATEX Zone 2 areas, common in oil extraction rooms. We pack the meter with a PT100 temperature sensor embedded in the measuring chamber, so you can log product temperature during the dosing cycle. This data helps a nutritional supplement plant prove that the oil stayed under the oxidation threshold during batch make-up.
For buyers in the Middle East and East Africa, we ship the oval gear meter with a calibration certificate traceable to ISO 17025 for an extra fee of USD 145. The standard certificate covers 10 percent, 50 percent, and 100 percent of full scale with a calibrated oil sample of 40 cP. Send your oil temperature (°C), pipe size (DN), and target flow range to our sales desk. We will return a data sheet and a landed cost breakdown within one business day. Visit flow-meter.com.au to see the SIL-OG and SIL-CMF product pages.
Frequently Asked Questions
Can an oval gear flow meter handle cooking oil with small seed particles? Yes, if you choose a meter with hardened gears and a filter upstream. For oils that carry fine sediment, we set a 100-mesh Y strainer right before the meter inlet. The SIL-OG gears are hard chrome-coated 316L with a Rockwell hardness above 58 HRC. This stops abrasive wear from seed husk fragments.
What accuracy is realistic at 10 L/min for soybean oil in a supplement plant? The SIL-OG oval gear meter holds ±0.5% of reading across 1:10 turndown, so at 10 L/min you can expect a repeatability better than 0.1%. Coriolis meters from Silver Instruments deliver ±0.15% mass accuracy for coconut oil and similar oils.
Does the meter comply with FDA 21 CFR for food contact? Wetted parts are 316L stainless steel with PTFE or EPDM seals, all compliant with FDA 21 CFR 177. The surface finish is electropolished to 0.8 Ra, matching the standard for nutritional supplement liquid service. We supply a material certificate with each meter.
Can I use a single meter for both oil and cleaning solution during CIP? Yes. The oval gear meter tolerates hot alkaline detergent and acid rinse at temperatures up to 120 °C. After a CIP cycle, the meter returns to its oil calibration without offset. We have tested this on a fish oil line in Peru over 300 CIP cycles with no drift.
What output signal works best for a nutritional supplement batching PLC? A 4-20 mA HART signal with dual pulse output is the standard. The analog channel sends flow rate, the pulse channel drives a batch totalizer for high-accuracy dosage. Both connect directly to a Siemens S7-1200 or Allen-Bradley CompactLogix PLC without extra converter cards.
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