Current position > Product detail
『2 Turbine Flow Meter: Two-Inch High-Velocity Mechanical Fluid Transducers』Related information(flow rotameter|digital flow meter|balo meter|hydraulic flow meter|volumetric meter|positive displacement meter|pitot tube flow meter|displacement meter|cfm meter|variable area flow meter|inline flow meter|differential pressure flow meter|calibrated flow meter|velocity meter|paddle wheel flow meter|oval gear flow meter|anemometer hvac|multiphase flow meter|doppler flow meter|thorpe tube flowmeter|heat flow meter)
2 Turbine Flow Meter: Two-Inch High-Velocity Mechanical Fluid Transducers
A 2 inch turbine flow meter is a DN50 inline mechanical flow transducer for clean low viscosity liquids. It measures flow by rotor speed. The rotor sits directly in the liquid stream. Magnetic pickups detect each blade pass and send a pulse or frequency signal.
Quick Answer: A 2 inch turbine flow meter from Silver Automation Instruments handles diesel, light oil, water, and similar clean fluids from about 1.5 to 40 m3/h depending on viscosity and pressure. It gives you pulse output for batching or 4-20 mA for process control. Send us your pipe size, liquid, flow range, and connection standard to get a price.
What Is a 2 Inch Turbine Flow Meter
The nominal bore is 2 inches. In metric terms that is DN50. The mechanical part is a bladed rotor. Liquid velocity rotates the rotor. A magnetic pickup outside the flow path detects the rotating blades. The output is a frequency. Higher flow means higher frequency. This design has no powered electronics inside the pipe.
Silver Automation Instruments calls this a high velocity mechanical fluid transducer because the measurement depends on velocity and rotor mechanics. The meter body can be flanged or threaded. The rotor bearing is the main wear part. Bearing choice depends on liquid lubricity and cleanliness.
Flow Range, Accuracy, and Output Signals
For water at 20 °C we normally size a 2 inch turbine flow meter for 2 to 40 m3/h. For diesel fuel the practical range is about 1.5 to 28 m3/h. For low flow applications below 1 m3/h a smaller DN15 or DN25 turbine meter often fits better.
Accuracy is ±1% of reading as standard. With linearization and wet calibration we can reach ±0.5% of reading for a limited flow range. Repeatability is often ±0.1%. That is different from accuracy. Repeatability matters when you need the same result each batch.
Signal options include pulse, 4-20 mA, and RS485 Modbus RTU. Pulse output is common for fuel dispensing and batching. 4-20 mA is common for PLC and DCS loops. RS485 is useful when you want to read flow rate and total from a fieldbus network. We can also supply a local display totalizer.
Materials and Process Connections
Standard body material is 304 stainless steel. For seawater or corrosive chemicals we quote 316 stainless steel. Rotor material can be CD4MCU or 316 SS. Bearings can be tungsten carbide, graphite, or PTFE. Tungsten carbide bearings handle water and low lubricity liquids. Graphite bearings work well in diesel and light oil. PTFE bearings are for chemical compatibility but have lower pressure limits.
Process connections include 2 inch ANSI 150 lb flange, DIN PN16 flange, JIS 10K flange, and NPT threads. Maximum working pressure for a standard flanged stainless steel DN50 body is usually 6.4 MPa. Standard temperature range is -20 to 120 °C. For higher temperatures we can supply a remote pickup version.
Applications Where a 2 Inch Turbine Flow Meter Works
Diesel generator fuel lines in Southeast Asia use this meter size a lot. A 2 inch line matches many day tank and transfer pump installations. The meter gives pulse output to a fuel management system. Last year a fuel depot in Vietnam replaced old mechanical totalizers with Silver Instruments DN50 turbine meters. They now read batch totals on a PLC screen and cut manual logging time.
A pump test bench in Queensland uses a 2 inch turbine flow meter on water. The test bench measures pump discharge flow across 120 seconds. The operator reads frequency from a PLC high speed counter. Accuracy was improved by wet calibration across 5 flow points.
Other applications include boiler fuel oil feed in Nigeria, irrigation water distribution in Peru, light chemical batching in Indonesia, and marine gas oil transfer on small supply vessels. In marine fuel transfer
Applications Where It Does Not Fit
The turbine flow meter is not for heavy oil, paint, syrup, or any liquid above about 5 cP. The rotor slows and the meter under-reads. For high viscosity liquids choose an oval gear flow meter. That meter gives better accuracy in oil, paint, and adhesive service.
Do not use a turbine flow meter on slurries or dirty water. Particles damage the bearing. For wastewater or slurries an electromagnetic flow meter is a better fit. Also avoid liquids with gas bubbles. Gas bubbles cause the rotor to spin high and create false readings. Install a strainer upstream and keep enough back pressure to prevent cavitation.
Installation and Maintenance Notes
For a DN50 turbine meter we recommend 10 DN of straight pipe upstream and 5 DN downstream. That means 500 mm of straight run before the meter and 250 mm after. You do not need this if you can accept less accuracy. Most engineers skip this part and then wonder why readings shift at high flow.
Flush the pipe before installing the rotor. Weld debris and pipe scale kill bearings fast. Use a 60 mesh strainer for water. Use a 40 mesh strainer for diesel. Clean the strainer on a schedule. In practice, clean fuel lines with a good strainer get years of service. We have seen customer sites in the Middle East lose rotors in two months because the strainer was never opened.
Model Selection for Common Fluids
For clean water we recommend a 2 inch 316 stainless steel body, tungsten carbide bearings, and pulse output. For diesel or light oil we recommend a 304 or 316 stainless steel body, graphite bearings, CD4MCU rotor, and pulse or 4-20 mA output. For non aggressive light chemicals we recommend checking chemical compatibility with our engineers before ordering.
Silver Instruments keeps standard DN50 turbine flow meters in production with short lead time. Custom ranges, flanges, and output boards are available. We ship to Australia, Vietnam, Indonesia, Nigeria, Peru, Saudi Arabia, and other industrial markets.
How to Request a Price for a 2 Inch Turbine Flow Meter
Send us your pipe size (DN), liquid name, viscosity in cP, minimum and maximum flow in m3/h, pressure in bar, temperature in °C, process connection standard, and output signal. A complete request helps us quote the right model in one day.
Call Silver Automation Instruments at Tel: +86-135-1213-1526. Use Whatsapp: 86-135-12131526. Or send a message on WeChat: +86 13512131526. Our sales engineers will confirm model code, K factor calibration, and shipping cost. For product details and technical drawings, visit flow-meter.com.au.
FAQ on 2 Inch Turbine Flow Meters
What liquids can a 2 inch turbine flow meter measure?
A 2 inch turbine flow meter works with diesel, light oil, treated water, condensate, and non aggressive liquid chemicals. Keep viscosity under 5 cP for reliable readings.
What flow range should I use for DN50?
For water we use 2 to 40 m3/h. For diesel use 1.5 to 28 m3/h. Tell us your normal and maximum flow so we can check the K factor and rotor size.
Is a turbine flow meter good for wastewater?
No. Wastewater has solids and particles. Those particles damage the rotor bearing. Choose an electromagnetic flow meter for wastewater or slurry service.
Which output signal should I choose for batching?
Pulse output is best for batching and totalizing. It connects to a PLC high speed input or batch controller. Use 4-20 mA for continuous process flow and control loops.
How do I get a quote from Silver Automation Instruments?
Send your pipe size, liquid, flow range, pressure, temperature, connection standard, and output signal to our phone, Whatsapp, or WeChat. We usually reply within 24 hours on business days.