Variable Area Flowmeter
Product categories
Variable Area Flowmeter
GENERAL INFORMATION
The variable area flowmeter works on the variable-area principle: a float lifts in a tapered metal tube until forces balance, with position magnetically coupled to an external indicator. Its all-metal construction withstands high pressure, temperature, and corrosive fluids. It is widely used for reliable flow measurement of liquids, gases, and steam in chemical, petrochemical, oil & gas, pharmaceutical, food & beverage, and power industries, especially for small-to-medium flows where local indication without auxiliary power is required.
BRIEF INTRODUCTION
The smart metal tube float flowmeter can measure the flow of liquid, gas, and steam media. It is widely used in flow measurement and process control in petroleum, chemical industry, metallurgy, power, paper making, food, pharmaceutical, and other industries. The smart metal tube float flowmeter complies with Q/CP50.2-2021 and JB / T6844-2015 national standards, and the factory verification complies with JJG257-2007 verification regulations. The uniform magnetic field technology of the float makes the float become a rotor.
The multi-stage cone tube technology is adopted to make the measurement more stable and make the scale tend to be linear. Based on a modular design, it supports temperature and pressure compensation function, relay alarm output, Namur switch signal output, Hart, Modbus protocol output and graphic LCD design, and Switchable multi-picture display.
ADVANTAGES
- Mechanical display or LCD.
- The short-stroke design allows measuring a high flow rate using a relatively short metering tube.
- A special application is for hazardous, dangerous, or aggressive fluid, for high temperature and high-pressure rates.
- All stainless-steel design provides a safe measurement of a variety of liquids, gases, and steam
- The measuring section can be equipped with a heating jacket.
- The standard rotameter is mounted in a vertical pipeline with a flow direction upwards.
MAIN SPECIFICATIONS
| Diameter | DN15-DN200 |
| Measuring Range | Water (20°C): 1-205000 L/h Air(20°C, 0.1013 MPa): 0.3-3000m³/h |
| Range Ratio | 10:1; special 20:1 |
| Accuracy | ±1.0% for liquid; ±1.5% for gas |
| Ambient Temperature | Pointer type: -40℃ ~ +80℃ Remote: -40℃ ~ +85℃ (liquid crystal is not damaged); -30℃ ~ +80℃ (liquid crystal is able to operate) |
| Medium Temperature | SS304: -40℃ ~ +100℃ PTFE: 0℃ ~ +100℃ High Temp.: 110℃ ~ +450℃ |
| Nominal Pressure | DN15-DN50≤4.0MPa; DN80-DN200≤1.6MPa (common) DN15-DN50≤32MPa; DN80-DN200≤16MPa (special) |
| Pressure Loss | 7kPa~ 70kPa |
| Viscosity | DN15≤5mPa.s; ≤30mPa.s DN25≤250mPa.s DN50-DN100≤300mPa.s |
| Protect Level | IP65 |
| Output | Pulse, 4-20mA, flow rate alarm |
| Alarm Output | H&L Alarm Switch value(1A@ 30V DC) Relay output (1A@ 30V DC or 0.25A@ 250V AC or 0.5A@ 125V AC) |
| Communication | Rs485, HART |
| Power Supply | 4-20mA 24V DC (12V DC~ 22V DC) 2 wires system Alarm type: 4-20mA 24V DC (18V DC~ 28V DC) 4 wires system 85~ 265V AC 50Hz Battery: 3.6V@ 7.5 AH (lithium) |
| Process Connection | Flange (DIN, ANSI, JIS, etc.) Sanitary Tri-clamp Type Thread connection |
| Explosion-proof | Exia ⅡCT5Ex Exd ⅡBT6 |








