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Vegetable Oil Flow Meter 100 L/h for Flavoring Blending Control
Quick Answer: For measuring vegetable oil at 100 L/h in flavoring blending, an oval gear flow meter with 4-20 mA output and local display is the most reliable choice. This positive displacement meter handles oil viscosity changes, delivers ±0.5% accuracy, and fits directly into DN10 or DN15 process lines. Silver Automation Instruments supplies these meters with PT100 temperature compensation and food-grade wetted parts.
Why Oval Gear Meters Work Best for Vegetable Oil Dosing
Vegetable oils used in flavoring blending vary in viscosity. For instance, palm oil at 40 °C flows at around 40 cP, while soybean oil at 25 °C can reach 65 cP. Turbine meters lose accuracy when viscosity changes. Magnetic flow meters cannot measure oil because oil is non-conductive. Here is the thing: viscosity changes kill turbine meters, but oval gear meters do not care. An oval gear flow meter is a positive displacement meter. It captures a fixed volume between two oval gears and a measuring chamber. Viscosity changes do not affect the volumetric accuracy. You get ±0.5% of reading right at 100 L/h, regardless of oil type or temperature shift. This is why food engineers pick oval gear meters for small batch flavoring lines.
What You Need to Control 100 L/h in a Blending Skid
A typical blending skid for liquid flavors runs multiple streams into a mixing tank. The vegetable oil line often uses a DN10 or DN15 pipe. Flow rate rarely exceeds 200 L/h. You need a meter that responds fast and gives clean pulses or 4-20 mA to a PLC. Our standard recommendation is a SILVER OGM series oval gear meter with an integral transmitter. The meter body is 316L stainless. Shafts are tungsten carbide. Bearings are carbon graphite, suitable for oil lubrication. The transmitter outputs a 4-20 mA HART signal, so your PLC reads flow rates and totalized volume. You can set a batch preset directly from the local LCD display or from a remote HMI. Power supply is 24 V DC. Accuracy stays within ±0.5% even after months of continuous duty. We delivered this exact setup to a flavor house in Malaysia last quarter. They blend soy sauce base with sesame oil at 90 L/h and needed stable repeatability. Their downtime dropped after they replaced a Coriolis meter that was oversized for the line.
Temperature Compensation: Why You Want a PT100 Inside
Vegetable oil volume changes with temperature. In a tropical plant in Indonesia, ambient temperature swings from 28 °C in the morning to 35 °C by noon. Oil volume can change by 1.5% across that shift. If you dose by volume only, your recipe drifts. The SILVER OGM meter can integrate a PT100 temperature sensor directly in the measuring chamber. The transmitter uses live temperature data to compensate volume to a reference of 15 °C or 20 °C. The 4-20 mA output can be scaled to mass flow in kg/h if you enter the oil density. For soybean oil at 30 °
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Food Safety: Wetted Parts and CIP Cycles
Flavoring lines require Clean-in-Place cycles with hot water or mild caustic at 80 °C. Meter wetted parts must withstand these conditions. The oval gear meter we supply uses 316L stainless steel for the housing and gears. Seals are PTFE. No brass, no aluminum. The surface finish is Ra 0.8 µm or better. The meter is rated IP67, so washdown does not damage the electronics. We also supply an Ex version for ATEX Zone 1 if your blending room handles ethanol-based flavors. Simply tell us your area classification and cleaning temperatures when you ask for a quote.
Typical Signals and Integration with PLCs
Most blending skid PLCs accept 4-20 mA, pulse, or RS485 Modbus. Our flow meter offers all three from the same transmitter. The pulse output gives you high resolution for batch control. One liter can equal 100 pulses, so at 100 L/h you get 10,000 pulses per hour. That means you can stop a batch at exactly 5.00 liters. The 4-20 mA signal represents flow rate. The RS485 Modbus link sends accumulated totals, temperature, and diagnostic flags to a SCADA system. We often pre-configure the Modbus map for Siemens, Allen-Bradley, or Mitsubishi PLCs. No extra code from your side. If your plant uses a simple relay-based controller, the meter has two solid-state relays that can switch a valve or pump directly.
FAQ: Vegetable Oil Flow Meter for Flavoring Blending
1. Can the meter handle palm oil that solidifies at room temperature?
Yes, if you keep the line traced at 40-50 °C. The oval gear meter works up to 120 °C. We recommend a heat jacket option. The PT100 sensor will compensate for the higher temperature.
2. What is the minimum flow the meter can measure?
For DN10 size, the minimum is 2 L/h. That covers turndown for a 100 L/h process, even during ramp-up and ramp-down of the pump.
3. How often do the gears need replacement?
With clean vegetable oil and a Y-strainer upstream, gear life exceeds 5 years. We have a customer in Vietnam running rapeseed oil at 80 L/h for four years without maintenance.
4. Can I get the meter in a tri-clamp connection?
Yes. Standard process connections include tri-clamp, DIN 11851, or threaded NPT. Tell us your pipe size and fitting standard when you request a quote.
5. Do you offer ATEX or IECEx certification?
Yes. We supply Ex ia and Ex d versions for Zone 1 and Zone 2. Just specify your gas group and temperature class.
Send us your oil type, flow rate (L/h), pipe size (DN), temperature (°C), and cleaning method. We will recommend a SILVER OGM flow meter with the right wetted materials and output signals.