Flow meters VX-300
Vortex Flow Meter
A vortex meter for steam, compressed air and gas, up to 350 °C.
- Pipe size range
- DN25 to DN300
- Accuracy
- ±0.5%
- End connection
- Flanged or wafer
- Transmitter mounting
- Integral or remote
Documents
Overview
Why buyers choose it
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Up to 350 °C
Rated from −40 to 350 °C, which is what makes superheated steam measurable at all.
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No moving part
The shedder does not rotate, so there is no bearing to fail in steam.
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Compensated on board
Pressure and temperature corrected in the meter — the difference between a flow figure and a billable one.
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Measures what a mag meter cannot
Steam, compressed air, oxygen, nitrogen and natural gas do not conduct. This does not care.
In detail
Steam is the reason this meter exists. A bluff body in the bore sheds vortices at a rate proportional to velocity, and counting them works in a medium that would destroy an impeller and that an electromagnetic meter cannot see at all, because steam does not conduct.
It is rated from −40 to 350 °C, which is what puts superheated steam within reach. There is one moving part fewer than a turbine meter: none. The shedder does not rotate, so there is no bearing to fail in superheated steam.
Compensation is the specification worth checking. A gas or a vapour changes density with pressure and temperature, so a velocity reading alone is not a mass or a standard volume. This one takes pressure and temperature inputs and does the correction on board, which is the difference between a flow figure and a billable one.
DN25 to DN300, sixty bar, flanged or wafer, with a flameproof enclosure for classified areas and a lithium battery option where running power to the line is the hard part.
Technical specifications
Metrological
| Measuring principle | Vortex shedding, with pressure and temperature compensation |
|---|---|
| Accuracy | ±0.5% |
| Repeatability | ±0.1% of span |
Hydraulic
| Measured media | Steam, compressed air, oxygen, nitrogen, natural gas, oils, solvents, chemicals |
|---|---|
| Medium temperature | −40 to 350 °C |
| Maximum working pressure | Up to 60 bar |
Materials
| Body material | SS304 or SS316 |
|---|---|
| Enclosure material | Aluminium |
Electrical
| Power supply | 24 V DC or lithium battery |
|---|---|
| Outputs | 4–20 mA, NPN pulse and relay |
| Display | LCD showing flow rate, totaliser, pressure and temperature |
Communication
| Communication | RS485, HART, GSM/GPRS or LoRa/NB-IoT |
|---|
Environmental
| Protection class | IP65, IP67 or IP68 |
|---|---|
| Explosion protection | Flameproof (FLP) |
| Ambient conditions | −20 to +60 °C, 5% to 85% humidity |
Dimensions and installation
| Pipe size range | DN25 to DN300 |
|---|---|
| End connection | Flanged or wafer |
| Transmitter mounting | Integral or remote |
Parts
Parts of a vortex meter
How a meter of this type is built, and what this model is made of.
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Transmitter with display
Processes the sensor signal into a flow reading and shows it.
Display LCD showing flow rate, totaliser, pressure and temperature
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Cable entry
Where the signal and power cables enter the transmitter housing.
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Sensor housing
Encloses and protects the vortex sensor.
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Vortex sensor
Detects the pressure oscillation of each shed vortex.
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Bluff body
Sheds alternating vortices at a rate proportional to velocity.
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Body
Carries the flow through the bore past the bluff body.
Body material SS304 or SS316
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Flange
Bolts the meter to the pipeline.
End connection Flanged or wafer
Download centre
Everything you need to specify.
Documents for the Vortex Flow Meter.
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Download PDF (Opens in a new tab)
Technical datasheet
Specifications and dimensions.
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- Accuracy
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