Vortex Flow Meter Supplier in Bangladesh
Digital Steam vortex flow meter for steam, gas and air lines, from 25 to 300 mm, supplied with installation and after-sales support by Techno Bangla Creation.
What Is a Vortex Flow Meter?
A vortex flow meter measures how fast steam, gas, air or thin liquid moves through a pipe. A bluff body in the flow sheds swirling vortices, and the shedding frequency rises in step with flow velocity. The electronics count that frequency and show flow rate, with no moving parts. It is widely used on steam and compressed air lines.
It is not a thermal mass meter or a turbine meter. A vortex meter reports volume from vortex frequency, a thermal gas flow meter reads gas mass flow from heat transfer, and a turbine meter counts a spinning rotor.
- Digital display for steam, gas and air flow
- Line sizes from 25 to 300 mm (about 1 to 12 inch)
- SS 304 or SUS316 construction, 5 m cable included
- Installation and after-sales support in Bangladesh
Vortex Flow Meter Specifications
- Type
- Vortex shedding (Kármán vortex) flow meter
- Medium
- Steam, gas and air, with digital display
- Line Size
- 25 ~ 300 mm (about 1 ~ 12 inch)
- Temperature
- 80 ~ 250 °C as listed (about 176 ~ 482 °F)
- Material
- SS 304, SUS316
- Cable
- 5 m cable included
- Brand
- Smart Measurement Co, Ltd, TECHANGE
- Origin
- USA, China
Pressure rating, accuracy, output signal and temperature limits depend on the model. Send your duty point and our engineers will confirm them on the datasheet.
Vortex vs Orifice Plate, Thermal Mass and Turbine Meters
Each meter suits different lines. Vortex is a common first choice for steam and wide flow swings.
| Feature | Vortex | Orifice Plate | Thermal Mass | Turbine |
|---|---|---|---|---|
| Principle | Vortex frequency behind a bluff body | Pressure drop across a restriction | Heat carried away by the flow | Spinning rotor |
| Output | Volume. Mass needs compensation | Volume. Mass needs compensation | Direct gas mass flow | Volume |
| Steam | Widely used, including superheated | Long used, common in older systems | Less common than for gas | Insertion types exist |
| Gas and air | Suitable | Suitable | Widely used for compressed air and gas | Suitable for clean gas |
| Moving parts | None | None, but the plate can wear | None | Rotor and bearings |
| Turndown | Often reported 10:1 to 30:1 | About 5:1 | Varies by model | Varies by model |
| Pressure loss | Moderate, lower than an orifice | Highest of the group | Low | Low to moderate |
| Best fit | Steam and gas lines with wide flow swings | Older steam lines and existing DP setups | Direct gas mass flow | Clean gas and liquid lines |
Values are typical figures from manufacturer and engineering references. Always confirm against the datasheet of the exact model.
How Does a Vortex Flow Meter Work?
- Flow Meets the Bluff BodySteam, gas or air hits a fixed bar placed across the pipe.
- Vortices Are ShedSwirls break away alternately from each side of the bar.
- Sensor Counts PulsesEach vortex makes a small pressure pulse that the sensor picks up.
- Frequency Becomes FlowFrequency is proportional to velocity, so the electronics calculate flow rate from it.
- Display and OutputThe digital display shows flow. Mass flow needs temperature and pressure compensation.
Why Use a Vortex Flow Meter for Steam and Gas?
Figures come from manufacturers and engineering references. Confirm them for your model.
- One meter type for steam, gas and air lines
- No moving parts, so low wear compared with turbine meters
- Lower pressure loss than an orifice plate
- Wide turndown, often reported at 10:1 to 30:1 against about 5:1 for orifice plates
- No impulse lines, which simplifies piping and upkeep on steam
- Typical accuracy of about ±1.0 to ±1.5% of reading on gas and steam, depending on conditions
Is a Vortex Flow Meter Right for Your Line?
Choose a Vortex Meter When
- Steam, compressed air or gas flows turbulently in a full pipe
- Low pressure loss and no moving parts matter
- Flow swings widely and you want wide turndown
- About 10 pipe diameters upstream and 5 downstream are free
- The fluid is clean and low in viscosity
Choose Another Meter When
- Flow is very low, laminar or highly viscous
- Pipe vibration or pulsating flow cannot be removed
- Steam is wet or the fluid carries solids
- You need direct gas mass flow. See our thermal gas flow meter
- The liquid is water or conductive. See our electromagnetic flow meter
Where Are Vortex Flow Meters Used?
Any clean steam, gas or air line that flows turbulently and has room for straight pipe.
- Boiler Steam Headers
- Textile Dyeing and Finishing Steam
- Compressed Air Lines
- Food Processing
- Pharmaceutical Plants
- Power Plants
- Industrial Gas Lines
- Steam Sub-metering
How to Choose a Vortex Flow Meter
Share these details with our engineers and we will recommend a suitable size and model.
- Fluid and condition. State saturated steam, superheated steam, gas or air, with pressure and temperature. The listed range is 80 ~ 250 °C, so confirm it covers your line.
- Size and flow range. Select size from flow velocity, not pipe size. The meter is often one line size smaller than the pipe. Keep your lowest flow above the low-flow cutoff.
- Straight pipe and position. Plan about 10 D upstream and 5 D downstream, more after valves or bends. Keep the meter away from pumps and compressors that cause vibration or pulsation.
- Mass or volume. A vortex meter reads volume. For steam or gas mass flow, add temperature and pressure compensation, built in or through a flow computer.
- Where to meter first. In Bangladesh mills, start at the boiler outlet, then add meters at big users such as dyeing, finishing and compressed air headers to find losses by area.
Why Does Steam Metering Matter?
One audit summary of South Asian wet-processing mills reports steam at roughly 30 to 40 percent of total energy use, with pipeline losses of about 12 to 20 percent where lines are poorly insulated or maintained. A meter on the steam header shows how much you make and use.
Published assessments of Bangladeshi textile mills found that many estimate steam, water and chemical use from machine capacity instead of measuring it. Figures differ by mill, so measure before you plan savings.
Installation and After-Sales Support
Techno Bangla Creation supplies flow meters, treatment plant equipment and technical support to factories across Bangladesh. Send your fluid, line size, pressure and temperature and our engineers will confirm a suitable vortex meter and the straight-pipe layout it needs.
See our full range of flow meters, or the ETP plant page for complete plant solutions.
Frequently Asked Questions
What is a vortex flow meter?
A vortex flow meter measures steam, gas or low-viscosity liquid flow by counting vortices shed from a bluff body placed in the pipe. The vortex frequency is proportional to flow velocity, so the electronics convert it into flow rate. With no moving parts, it is a common choice for boiler steam and compressed air lines.
How does a vortex flow meter measure steam?
A bluff body in the steam line creates vortices whose frequency follows steam velocity. Because steam density changes with pressure and temperature, the basic reading is volumetric. For mass flow in kg/h you need temperature and pressure compensation, either built into the meter or done by a flow computer. Ask for this when you order.
Is a vortex meter better than an orifice plate for steam?
Vortex meters are often preferred for steam because they need no impulse lines, lose less pressure and offer wider turndown, commonly 10:1 to 30:1 against roughly 5:1 for an orifice plate. Orifice plates remain common in older steam systems. The right choice depends on steam condition, flow range and available straight pipe, so share your line data.
What sizes and temperature range do you supply?
Our listed vortex flow meter covers line sizes from 25 to 300 mm (about 1 to 12 inch) for steam, gas and air, with SS 304 or SUS316 construction, a digital display and a 5 m cable. The listed temperature range is 80 to 250 °C. Exact pressure rating and options depend on the model, so we confirm them against your duty.
How much straight pipe does a vortex meter need?
Makers commonly ask for about 10 pipe diameters of straight pipe upstream and 5 downstream, and some specify 30 or more after valves, bends or reducers. Longer straight runs improve accuracy. If space is tight, tell us early so we can check your layout. Always follow the installation drawing for the exact model.
Can a vortex flow meter measure compressed air and gas?
Yes. Vortex meters measure gas and air as well as steam, provided the flow is turbulent and the fluid is clean. For compressed air at changing pressure, add pressure and temperature compensation to report normal or mass flow. If you only need direct gas mass flow, a thermal mass meter is another option we can compare with you.
When should I not use a vortex flow meter?
Avoid it for very low or laminar flow, thick viscous liquids, strong pipe vibration, pulsating flow, wet two-phase steam or fluids carrying solids. Below its low-flow cutoff, which depends on Reynolds number, a vortex meter reads zero. For water or other conductive liquids, an electromagnetic meter is often the better fit.
How much does a vortex flow meter cost in Bangladesh?
Price depends on line size, material, pressure rating, temperature and pressure compensation, output type and brand. A DN25 unit and a DN300 unit differ widely, so a single figure would mislead. Send your fluid, pipe size, pressure and temperature to our engineers by phone or email and we reply with a free quotation.
