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Sunflower Oil Flow Meter DN80: Balancing Flow Profiles in Refining Plant Pipelines
Quick Answer: For DN80 sunflower oil lines in refining plants, an oval gear flow meter handles distorted flow profiles without long straight pipe runs. Silver Automation Instruments supplies these meters with 4-20 mA HART output, PT100 temperature compensation, and ATEX Zone 1 certification. Send us your pressure, temperature, pipe size, and flow range for a specific quote.
Why Flow Profile Distortion Happens in Refining Plants
Refining plants have limited space. Pumps, elbows, and control valves often sit close to flow meters. On a DN80 sunflower oil line, a single 90-degree elbow placed just two diameters upstream creates a strong swirl. That swirl kills accuracy in turbine and vortex meters. Most engineers skip this check during initial design. In practice, the plant manager discovers the meter reads 3 to 5 percent off during a mass balance. The instrument gets blamed. The real problem is a distorted flow profile.
Sunflower oil at 40 degrees Celsius has a viscosity around 40 cP. That viscosity is high enough to hold the swirl for several meters downstream. Without a flow straightener, the velocity profile stays skewed. A straight run of 20D or 30D is rarely possible on an existing pipe rack.
Silver Instruments Oval Gear Meter Solves the Profile Problem
Here is the thing. Oval gear flow meters measure positive displacement. Two oval rotors trap a fixed volume of oil per revolution. The rotor speed depends only on the fluid volume passing through. Swirl, asymmetry, and turbulence do not change that trapped volume. You get repeatable accuracy of plus or minus 0.5 percent of rate even one pipe diameter after an elbow.
We often recommend the Silver Automation Instruments OG series oval gear flow meter for edible oil applications. The DN80 model handles flow rates from 2 to 50 cubic meters per hour. It fits line sizes from DN50 to DN100 with standard adapters. The meter body is cast steel with stainless steel rotors. You can add a PT100 sensor for density correction and net mass calculation. Output options include pulse, 4-20 mA, and HART protocol. For a refinery in Southeast Asia processing 200 tons of crude sunflower oil per day, we supplied ten DN80 units with Ex d ATEX Zone 1 certification. They mounted the meters directly downstream of heat exchangers. No flow straightener was needed.
Benefits for Your Sunflower Oil Refinery
No flow conditioner required. You cut piping and installation cost immediately. High viscosity tolerance is another advantage. The meter works from 1 cP to 100,000 cP. It handles cold start ups when the oil is thicker without shift in accuracy. Local display and remote monitoring come standard. The meter shows flow rate, total, and temperature. All data goes to your PLC via 4-20 mA HART. For food grade refining, we offer stainless steel 316L bodies with Tri-clamp connections. They are CIP capable and meet hygienic standards.
Avoid These Mistakes When Specifying a DN80 Sunflower Oil Meter
Do not assume a magnetic flow meter works. Sunflower oil does not conduct electricity. A magmeter will show zero flow or an empty pipe alarm. Many first time buyers in Africa and the Middle East make this e
Do not select a turbine meter without a flow straightener. A turbine meter on a DN80 line needs at least 20D upstream. If your straight pipe run is shorter, the accuracy drops significantly overnight.
Do not forget temperature compensation. Oil density changes with process heat. A PT100 input wired to the oval gear meter transmitter improves mass flow totals. Without it, your batch records drift with each temperature cycle.
Customer Example: A Refinery in Turkey
Last year a customer in Izmir asked us to replace a turbine meter on a DN80 crude sunflower oil line. The turbine output fluctuated by plus or minus 4 percent after a new pump was installed closer to the meter. Our team proposed the OG-80 oval gear meter with pulse and 4-20 mA HART. After installation, the batch accuracy returned to 0.5 percent. The plant manager told us the meter paid for itself in three months through better inventory control. We have seen similar results in Brazil, Thailand, and South Africa.
Get a Quote for Your DN80 Sunflower Oil Flow Meter
Send us your pressure in bar, temperature in degrees Celsius, pipe size as DN, and flow range in cubic meters per hour or kilograms per hour. We will recommend the right oval gear meter and select the proper ATEX certification if required. Contact Silver Automation Instruments through flow-meter.com.au or ask for the oval gear flow meter datasheet directly. We ship to Southeast Asia, Oceania, Latin America, Africa, and the Middle East.
FAQ
Q: Can I use a Coriolis mass flow meter for sunflower oil instead?
A: Yes. A Coriolis meter measures mass flow and density directly and handles distorted profiles well. But for DN80 lines and a budget under 5,000 USD, an oval gear meter often costs 40 percent less. Silver Automation Instruments supplies both types. We help you choose based on total cost of ownership.
Q: What output signal is best for refining plant PLC integration?
A: 4-20 mA with HART is the most common choice. You get a live flow rate plus digital access to diagnostics and totalizer data. Our meters support passive and active output wiring.
Q: Does the oval gear meter need frequent recalibration?
A: The meter is mechanically robust. With clean sunflower oil, check the calibration every 12 months. If you have a master calibration rig on site, the process takes about half a day. Silver Instruments provides a calibration certificate traceable to national standards.
Q: What about sunflower oil at 120 degrees Celsius during deodorization?
A: The standard OG meter body handles up to 150 degrees Celsius when equipped with PTFE seals and a high temperature sensor. Specify your maximum temperature. We configure the meter with the correct seal and sensor combination for that duty.
Q: How do I handle air bubbles in the sunflower oil line?
A: Install an air eliminator upstream of the meter. Even a small amount of entrained air reduces positive displacement accuracy. Our team can supply a combined oval gear meter and air eliminator package sized for DN80 lines.