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Flow Meter Buy Online Guide: Industrial Sourcing Tips for Selecting Correct Specifications
Quick Answer: Choose a flow meter based on four data points first. Fluid name, pipe size in DN, minimum and maximum flow rate, and output signal. For water use an electromagnetic flow meter. For diesel use an oval gear flow meter. For gas use a thermal mass flow meter. Send these points to Silver Automation Instruments for a specific model and price.
Most engineers skip this part. They search for a flow meter price and then reverse fit the spec. In practice we have seen this on customer sites many times. A water plant in Vietnam ordered a DN100 electromagnetic flow meter and did not mention silt. The 316L electrode was wrong. A grounding ring and Hastelloy C electrode fixed it.
Lock Down Fluid and Process Data
You need the fluid type, viscosity in cP for oil, conductivity in µS/cm for electromagnetic meters, gas type for thermal meters, pressure in bar, and temperature in °C. You also need the signal output. A 4 to 20 mA HART signal fits most PLC and DCS systems. Pulse output fits batching. RS485 Modbus fits data logging. The same DN25 line can carry water at 5 µS/cm or diesel at 60 cP. Those require different meter types and sensor materials. If you do not know the viscosity or conductivity, send the fluid name and process description.
Four Specifications That Change the Quote Fast
Liner material is one. EPDM works for potable water and most wastewater. PTFE works for chemicals and higher temperature. PFA works for aggressive acids. Electrode material is another. 316L is standard for water. Hastelloy C works for seawater and some acids. Titanium works for chlorinated water and seawater feed lines. Process connection also matters. Flanged ANSI or EN faces cost more than threaded or tri clamp options. Approval and output change the price. ATEX Zone 1, IECEx, HART, and RS485 all affect the final quote. We list the liner, electrodes, connection, cable entry, and output in the offer.
Flow Meter Types by Application
For water and wastewater, use an electromagnetic flow meter from DN15 to DN2000. It needs a minimum conductivity of 5 µS/cm. It handles 0.1 to 10 m/s. Standard options include EPDM liner and 316L electrodes. For seawater desalination plants, use PTFE liner and Hastelloy C electrodes. Ask for a seawater flow meter for desalination plant duty.
For diesel, furnace oil, and heavy fuel oil, use an oval gear flow meter. It handles 1 to 200 cP and gives pulse output for totalizing. A DN25 oval gear flow meter for diesel works on generator lines. We have shipped these to Vietnam, the Philippines, and Kenya. Cast steel bodies with PTFE gears are common. Use 316L stainless steel bodies for food grade oil.
For chemicals, syrups, and mass balance, use a Coriolis mass flow meter. It measures mass flow in kg/h directly and gives density and temperature. It works from DN15 to DN50 for small process lines. Accuracy can reach 0.2 percent of reading. A paint manufacturer in Southeast Asia used a DN15 Coriolis meter for solvent blending. The fluid was 12 cP at 25 °C. They needed 4 to 20 mA HART and ATEX Zone 1.
For compressed air, nitrogen, and biogas, use a thermal mass flow meter. It gives Nm³/h or kg/h. Insertion probes fit DN50 to DN300. We can supply units with PT100 input for temperature compensation. A customer in South Africa ordered a thermal mass flow meter for compressed air at 7 bar. The unit needed a straight run
For large pipes, seawater intake, and temporary measurement, use an ultrasonic flow meter. A clamp on model measures flow without cutting the pipe. It works for clean water and seawater. We supply clamp on ultrasonic flow meters for desalination feed water and cooling water in the Middle East. Tell us the pipe material, outside diameter, wall thickness, and liner if any.
Buying Online Without a Field Failure
A dairy plant in Colombia ordered a sanitary electromagnetic flow meter for CIP solution. The original liner was neoprene rated for 60 °C. The CIP cycle ran at 85 °C with caustic. The liner deformed. The fix was a PTFE liner and 316L electrodes rated for 120 °C. A single missing temperature value caused the failure. Vortex meters also need straight run, about 15 pipe diameters upstream and 5 downstream. Check pressure rating, temperature rating, liner, electrode, and connection standard before buying.
What to Send for a Quote
Send Silver Automation Instruments the fluid name, pressure in bar, temperature in °C, pipe size in DN, flow range in kg/h or m³/h, viscosity in cP for oil, conductivity in µS/cm for electromagnetic meters, output signal, and hazardous area approval. Include your country and port for freight. We reply within 24 hours with a model, price, and shipping time.
As a flow meter manufacturer and supplier, we stock common DN15 to DN200 electromagnetic flow meters and DN15 to DN50 oval gear flow meters. We also build Coriolis mass flow meters, ultrasonic flow meters, thermal mass flow meters, and vortex flow meters. We ship to Southeast Asia, Oceania, Latin America, Africa, and the Middle East. We serve end users and distributors in oil and gas, water, chemical, food and beverage, and marine. Our site is flow-meter.com.au.
FAQ: Five Questions That Decide Most Orders
Q: I do not know my exact flow range. Can you still quote? A: Yes. Send the pipe size and fluid name. We can estimate the typical range. A meter sized too large may not read well at low flow.
Q: Which output signal should I choose? A: Choose 4 to 20 mA HART for a PLC or DCS. Choose pulse for batch totals. Choose RS485 Modbus for data logging. Many models support two outputs.
Q: Do you supply hazardous area flow meters? A: Yes. We offer ATEX Zone 1 and Zone 2 options for Coriolis mass flow meters, thermal mass flow meters, and vortex flow meters. Send the zone and gas group.
Q: Can you supply to Southeast Asia, the Middle East, or Africa? A: Yes. We ship regularly to Malaysia, Vietnam, Indonesia, the Philippines, Saudi Arabia, the UAE, Nigeria, Kenya, Mexico, and Chile. We also support local distributors.
Q: How do I get price and lead time? A: Send the fluid, pressure, temperature, pipe size, flow range, viscosity if oil, conductivity if water, and output signal. We reply with a specific model and price within 24 hours.
Contact Silver Automation Instruments
Tel: +86-25-68650347. WhatsApp: +86-25-52155837. WeChat: +86 15365082610. For a seawater flow meter for desalination plant duty, a diesel oval gear flow meter, compressed air monitoring, or sanitary food lines, send the process data and we will quote a clear model. Our engineers match the sensor to the fluid, the liner to the temperature, and the signal to the control system.
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