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Cooking Oil Flow Meter DN50 for Food Processing Lines – Heat Specs and Selection
Quick Answer: For a DN50 cooking oil flow meter on a heated food line, choose an oval gear meter with a heating jacket or a Coriolis mass flow meter with high-temperature sensors.
These meters handle oil viscosities from 10 cP to 500 cP and temperatures up to 150 °C.
Silver Automation Instruments ships pre-configured DN50 meters with PT100, 4-20 mA HART, and tri-clamp connections.
Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range (kg/h) to get a same-day recommendation.
Why DN50 Fits Most Edible Oil Process Lines
A DN50 (2 inch) pipe covers flow rates from 2,000 kg/h to 20,000 kg/h. This range is typical in snack factories, biscuit lines, and industrial frying systems across Vietnam, Indonesia, and Colombia.
Palm oil and soybean oil at 50 °C to 80 °C usually show a viscosity near 30 to 50 cP.
In practice, engineers want a compact inline meter. They skip impulse lines and impulse piping. A direct-mounted transmitter makes washdown easier and reduces leak points.
Heat Specs That You Cannot Skip
When cooking oil runs at 90 °C to 130 °C, the flow meter must handle thermal expansion and prevent cold spots.
A standard oval gear meter with PPS gears can seize at 120 °C. We have seen this pattern on customer sites many times.
Silver Instruments supplies the OGM-DN50 model with an integrated heating jacket. The jacket keeps the measuring chamber at 80 °C during CIP cycles and stops fat solidifying after a weekend shutdown.
A fryer plant in Thailand measured hot soybean oil at 105 °C with a jacketed oval gear meter. Without the jacket, the gears locked after three weeks of intermittent duty.
Oval Gear vs. Coriolis for Hot Oil Measurement
Here is the thing. Oval gear meters give you direct volume pulses and batch control at a lower cost. The DN50 oval gear meter from Silver Instruments outputs 4-20 mA or a pulse signal that goes straight to a PLC or batch controller.
But when you need mass flow in kg/h and real-time density data to check oil blend ratios, pick a Coriolis meter.
A biscuit factory in Vietnam replaced two oval gear meters with a single-tube Coriolis meter, DN50, to measure palm olein at 95 °C and 12 bar. The plant engineer now monitors density trending and catches dilution issues the same shift.
Material, Connections, and Certification Details
For food-grade cooking oil, specify 316L stainless steel wetted parts, tri-clamp (DIN 32676) or DIN 11851 threaded connections. Use EPDM or FFKM
Silver Automation Instruments builds meters with a surface finish of Ra ≤ 0.8 µm and includes a 3.1 material certificate.
Because cleanability matters, ask for a meter body that tolerates 130 °C SIP cycles. We embed a PT100 resistance temperature detector inside the housing. The 4-20 mA HART protocol sends flow and temperature signals on the same pair of wires.
What to Prepare Before You Request a Quote
Do not just send a general enquiry. Experienced engineers collect four numbers first: nominal pipe size (DN50 or DN40), max flow rate in kg/h or L/h, operating pressure in bar, and minimum to maximum oil temperature in °C.
Also tell us the exact oil type: palm oil, sunflower oil, recycled frying oil. That information changes the pre-amplifier gain and the temperature compensation curve.
Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range. Our application engineers in Sydney or our partner network in Southeast Asia will answer within 10 working hours.
Frequently Asked Questions About DN50 Cooking Oil Flow Meters
Can the DN50 oval gear meter handle oil with small food particles?
The OGM series uses hardened steel gears with a clearance of 0.2 mm. It passes soft fines from frying sediment. We recommend adding a Y-strainer upstream if particles exceed 100 µm.
What if the oil temperature goes above 150 °C?
A standard heating jacket is rated to 150 °C. For hotter oil, we switch to an all-stainless meter body with high-temperature Hall-effect sensors and no internal plastics. Contact us with the exact maximum temperature.
Do you build ATEX-certified DN50 meters for edible oil lines?
Yes. We supply an explosion-proof enclosure certified for ATEX Zone 1, Group IIB, valid for gas and dust. Mention the hazardous area classification when you send us the specs.
How do you calibrate a meter for viscous cooking oil?
We tune each meter with a viscosity-matched calibration fluid at your process temperature. A 5-point calibration is standard. Then you receive a factory certificate traceable to ISO 17025.
What is the typical delivery time for a DN50 cooking oil meter with a heating jacket?
Non-ATEX versions ship in 6 business days from our Sydney warehouse. ATEX-certified units add 4 days. We keep 316L DN50 bodies and tri-clamp adapters in stock.
Need a DN50 meter for hot cooking oil? Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range. We will reply with a spec-to-fit offer the same business day.