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Vegetable Oil Flow Meter 5 m3/h for Commercial Fryer Feed Lines
Quick Answer: For a vegetable oil feed line flowing at 5 m3/h to a commercial fryer, a sanitary oval gear flow meter gives the most stable measurement across batch cooking cycles. Silver Automation Instruments supplies the OG series with food-grade seals, 4-20 mA output, and high-temperature tolerance. This meter keeps accuracy within 0.5% even when oil viscosity changes from cold start to frying temperature.
What Makes a 5 m3/h Fryer Feed Line Different
A commercial fryer often pulls oil from a central kitchen ring main or a daily tank. At 5 m3/h the pipe runs are short but the flow is not steady. Pumps cycle on and off based on fryer vat level. Temperature at the meter ranges from 25 °C ambient to 160 °C if oil recirculates through a heat exchanger. Viscosity can swing from 65 cP on cold startup down to 8 cP at frying heat. Any meter without direct volume displacement will drift under these swings.
Why Oval Gear Meters Work for Vegetable Oil
Oval gear flow meters measure actual volume by moving pockets of liquid. They do not rely on flow profile, conductivity, or velocity. This makes them the first choice for palm oil, soybean oil, canola oil, and blended frying oils. The rotors turn in chambers with tight clearances, so high viscosity helps accuracy rather than hurting it. An oval gear meter with PTFE or Viton seals handles the oil media without swelling. Silver Instruments oval gear meters accept entrained particles up to 100 µm and a small amount of fryer debris that passes through the feed line filter.
Silver Instruments Recommended Model for 5 m3/h
Our most specified model for this duty is the OG-AL-25-SS with a 4-20 mA HART transmitter. Pipe size DN25 or DN40, depending on plant standard. Flow range 1 to 10 m3/h covers the 5 m3/h nominal point with room for peak recirculation. Body material 316L stainless steel, tri-clamp or DIN 11851 connections. Operating temperature up to 200 °C. Power supply 24 V DC, output signal 4-20 mA with HART 7. Accuracy ±0.5% of reading down to 50 cSt. Local display shows instantaneous flow in L/min and total volume in litres. A food-grade oil factory near Sydney runs six of these meters on separate fryer lines and reports maintenance only once per y
Installation and Output Signals
Place the meter on the discharge side of the supply pump. Straight pipe runs are not critical, but install a Y-strainer 100 mesh upstream to catch char. Mount the transmitter with cable entry facing down. Wire the 4-20 mA loop to a PLC or a Silver Instruments paperless recorder. For batch control, use the pulse output option at 100 pulses per litre. The meter can link directly to a batch controller for fryer oil dosing. Because the output is linear with volume, the control system gets a clean signal with no compensations needed for density or temperature.
Real-World Example from a Snack Plant in Malaysia
A snack food manufacturer in Johor replaced three aging turbine meters on their potato chip fryer lines. The old meters clogged once a month and lost accuracy above 120 °C. They installed Oval Gear OG-AL-25-SS meters with Viton seals and a local indicator. The plant team now records flow totals per shift without manual dipping. They shared that oil usage dropped by 3 percent because overfilling stopped. A simple swap to a positive displacement meter fixed a problem they lived with for five years. This kind of result is common when the meter matches the media.
Frequently Asked Questions
Can a single oval gear meter handle 5 m3/h and lower flushing flow of 0.5 m3/h?
Yes, the OG-AL-25-SS turndown ratio is 10:1, covering both. The meter measures accurately from 1 to 10 m3/h.
Does Silver Instruments supply tri-clamp connections for food safety?
We supply tri-clamp, DIN 11851, and SMS union connections. All wetted parts are 316L stainless steel with surface finish Ra 0.8 µm or better.
Will the meter survive hot oil cleaning (CIP) cycles?
The standard Viton seals tolerate 200 °C, and the meter body has no dead zones. Steam washdown is possible if the transmitter housing is IP67 rated.
What output signals can I use for a fryer feed line?
Standard is 4-20 mA HART. Pulse, RS485 Modbus RTU, and simple NPN open collector are also factory options.
How do I get a quote for a vegetable oil meter at 5 m3/h?
Send us your oil temperature, line pressure in bar, pipe size DN, and flow range. We will return a datasheet and price within one working day to your email.
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