Variable Area Flowmeter

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
PRODUCT PHOTOS