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Variable Area Flowmeter
  • KVAF Intelligent Metal Variable Area Flowmeteris produced by ourcompanyusing the latest technology which is a kind of variable area flow measurement instrument applied in industrial automation process control. It has the advantage of small volume, wide detection range and convenient usage etc and used to measure flow of liquids, gases and steam, especially suitable for medium with low velocity and small flow.

    For many years, metal tubevariable area flowmeterwas widely be chosen in petrochemical, steel and iron, electric power, metallurgy, light industry, food, pharmaceutical, water treatment and other industries with its variety of fine performance, good reliability, and better cost performance to be used in measuring liquid, gas and steam of various industries and processing control.

  • Unique Features:

    •  Adopts linearization output device patent technology of intelligent metal variable area flowmeter to realize data display linearization.
    •  Sensor adopts the low cost HART communication device which based on the SCM and got the national practical new type technology certificate.

    General Features:

    • Very suitable to small diameter and low velocity
    • Simple structure, reliable performance, low maintenance and long service life
    •  Low requirements for straight pipe
    • Wide turndown ratio: 10:1
    •  Non contact magnetic coupling system to ensure stable data transmission
    • LCD display for instantaneous flowrate or total flow alternately
    •  HART Communication
    •  Intrinsically safe type and flameproof type available

     

  • Technical Parameters
    Measuring range
    Water(20℃)10 ~ 200000 L/h             
    Air (20℃, 0.1013MPa) 0.03 ~ 4000 m3/h
    Refer to flowrate table, special flowrate can be ordered.
    Turndown ratio: 10:1 for standard, 20:1 for special
    Accuracy: ±1.5% for local, ±1.0% for remote
     Rated pressure
    P1: 1.6MPa (DN80 ~ DN200) P2: 4.0MPa (DN15 ~ DN50)
    P3: 16MPa (DN80 ~ DN200) P4: 25MPa (DN15 ~ DN50)
    Jacketed type: 1.6MPa
    Pressure loss: 7 ~ 70KPa
     Medium temperature
    Standard type ( E ): -80℃~ 200℃; PTFE: 0℃~ 85℃
    High temperature ( H ): -80℃~ 300℃
     Medium Viscosity   
    DN15: η<5mPa · s(KV15.1 ~ KV15.3)
    η<30mPa · s(KV15.4 ~ KV15.8)
    DN25: η<250mPa · s   DN50 ~ DN250: η<300mPa · s
    Ambient temperature
    LCD display: -30℃~ +65℃                      Local: -40℃~ +80℃
    Connection
    Standard type: HG20594, HG20595 Special: specified by user
    Cable connector: M20*1.5
     Power supply
    Standard type: 24V DC(2-wires 4-20mA) 85-265V AC(50 HZ)
    Batterytype: 3.6V @ 7.5AH Lithium battery, can be used more than 3 years
     Output signal: 4 ~ 20mA
    Alarm output
    Upper or Lower Limitation Instantaneous Flowrate Alarm 
    Output with open collector: Max 100mA@30VDC impedance 100Ω
    Relay output: Contact capacity: 1A@30V DC or 0.25A@250V AC or 0.5A@125VAC
    Pulse output: Total pulse output, 50MSEL for Minimum interval
     LCD display
    Numerical range for instantaneous flowrate: 0 ~ 50000  
    Numerical range for total flow: 0 ~ 99999999( with decimal point)
     Protection class: IP65
    Explosion proof: Intrinsical safe: Exia IIC T5         Flameproof: Exd IIB T6
    Two-wire, battery, alternating current for options of power supply
    Multiply parameters calibration function
    With function of data restoration, data back-up and power-fail protection

     

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