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Flowstar Flow Meter Sizing: Robust Volumetric Measuring Instruments for Food and Beverage Applications
Quick Answer: Flowstar flow meter sizing starts with flow range, viscosity, temperature, pressure, and pipe size. These robust volumetric measuring instruments for food and beverage applications need the correct DN size to avoid low flow errors. For most food and beverage batching lines, DN15 to DN80 works when flow stays from 0.06 m3/h to 20 m3/h. Send your flow rate in kg/h, viscosity in cP, pressure in bar, and pipe size in DN to Silver Automation Instruments for a same day quote.
Contact: Tel +86-25-68650347, WhatsApp +86-25-52155837, WeChat +86 15365082610.
Flowstar Flow Meter Sizing Starts With Real Batch Data
Most engineers skip this part. They pick a line size and hope it works. Flowstar meters are positive displacement. They measure volume directly. But viscosity, flow range, and temperature change the meter size.
Get the minimum and maximum flow rate first. Milk at 1.03 cP and 800 kg/h fits a DN25 meter. Tomato paste at 8000 cP at the same mass flow often needs a larger meter or slower speed. That is the difference between a good batch and an inaccurate batching cycle.
We have seen this on customer sites many times. A dairy in Indonesia batching 500 kg/h cream at 45 cP ordered a DN25 Flowstar meter after sending us the viscosity data. The first installed meter was a DN20 and it lost accuracy at low flow. We changed the size before shipping.
Common Food and Beverage Applications for Flowstar Meters
Flowstar volumetric instruments handle milk, cream, yogurt, beer, wine, fruit juice, sugar syrup, glucose, edible oil, honey, sauces, and CIP chemicals. They are robust on the processing floor. The body is 316L stainless steel. Internals suit food grade use.
Breweries in Vietnam use Flowstar meters for yeast dosing and hop extract addition. A juice plant in Ecuador meters orange concentrate at 65 Brix with a DN40 meter. A sauce manufacturer in the Philippines batching soya sauce at 3.2 cP uses DN15 meters on the flavor line.
For inline blending, the meter output goes to 4-20 mA HART or pulse. A PLC or batch controller stops the valve at the target volume. This setup works for batch volumes from 20 liters to 5000 liters.
How to Read a Flowstar Sizing Table
Here is the thing. Do not select a meter by pipe size alone. A DN25 pipe may carry 0.1 m3/h at startup. That can be below the minimum flow of a DN25 meter. You then lose accuracy or the meter stalls.
Look at the minimum linear flow. Typical Flowstar ranges for water-like liquids are 0.06 to 6 m3/h for DN15, 0.2 to 20 m3/h for DN25, and 0.6 to 60 m3/h for DN50. Those ranges shift when viscosity rises above 100 cP. High viscosity liquid needs a larger clearance or lower speed.
Pressure drop matters too. A DN15 meter on honey at 10000 cP can lose over 2 bar. That may be fine for a transfer pump rated at 6 bar. It is not fine for a low pressure CIP return line. Send us your pressure limit in bar.
Viscosity Correction and Temperature Compensation
Flowstar meters are volumetric. They count the volume passing through the measuring chamber. But viscosity changes slip. At low flow and high viscosity, slip decreases. At high flow and low viscosity, slip can increase. So the meter curve is not al
Temperature changes density and viscosity. Milk at 5 °C has higher viscosity than milk at 40 °C. A meter sized for cold milk may be too large for hot milk. In practice, we add PT100 temperature compensation for 4-20 mA HART outputs on batching skids. The meter then corrects the volume to standard conditions.
For ice cream mix at 400 cP and 900 kg/h, choose DN25 with a 0.2% reading accuracy. For glucose syrup at 20000 cP, we often move to DN40 or DN50 even if the flow is low. This keeps pressure drop under 1.5 bar.
Installation Notes for Food and Beverage Lines
Install Flowstar meters with a strainer upstream. Positive displacement meters do not like particles, fibers, or welding debris. A 60 mesh strainer prevents most problems in food lines. Clean the strainer after commissioning.
Use air eliminators for liquids that foam or release gas. Beer and carbonated soft drinks need air removal upstream. The meter measures liquid volume. Air bubbles cause false totals. Mount the meter in a flooded line. Avoid a free drain after the meter.
Connections include tri-clamp, DIN 11851, RJT, SMS, and threaded. Specify the connection type when you ask for a quote. A yogurt plant in Thailand used DIN 11851 on DN25 meters for a new fermenter fill line. The mechanical fit was clean and CIP compatible.
Sizing Check From Silver Automation Instruments
Send us your pressure in bar, temperature in °C, pipe size in DN, and flow range in kg/h or m3/h. Include the liquid name and viscosity in cP. We will calculate the correct Flowstar size and recommend a pulse or 4-20 mA HART output.
Silver Automation Instruments supplies Flowstar volumetric measuring instruments for food and beverage applications in Southeast Asia, Oceania, Latin America, Africa, and the Middle East. Contact Tel +86-25-68650347, WhatsApp +86-25-52155837, WeChat +86 15365082610. You can also visit flow-meter.com.au for the full range.
FAQ: Five Questions Engineers Ask Before Buying
1. What is the minimum flow rate for a Flowstar meter in food service?
For water-like liquid, a DN15 meter can measure from 0.06 m3/h. A DN25 meter starts around 0.2 m3/h. If your batch flow drops below these values, we recommend a smaller meter or a different meter type.
2. Can Flowstar meters handle high viscosity sauces and syrups?
Yes. The meter handles viscosity up to 100000 cP in many cases. But the size changes. High viscosity liquids need larger clearance and lower speed. Send us the cP value and flow range.
3. What outputs are available for batching systems?
Flowstar meters support pulse, 4-20 mA, and 4-20 mA HART output. Pulse works well for batch controllers. 4-20 mA HART gives flow rate and total plus temperature compensation when PT100 is installed.
4. Are Flowstar meters CIP and SIP compatible?
Most food and beverage models are CIP compatible with 316L stainless steel bodies and food grade internals. SIP depends on the temperature rating. Check the maximum temperature for the meter model before steam sterilization.
5. How do I get a sizing quote from Silver Automation Instruments?
Send your pressure in bar, temperature in °C, pipe size in DN, and flow range. Mention the liquid and viscosity. Use Tel +86-25-68650347, WhatsApp +86-25-52155837, or WeChat +86 15365082610.
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