PWL Vortex Flowmeter

Brand: KOBOLD Instruments, Inc.

The Compact KOBOLD Type PWL flow meter works on the Vortex principle. A Karman vortex is created downstream of the sensor body, i.e. the fluid flow causes vortices to be created on both sides, and these are straightened out by the current.

This straightening out of the vortex is proportional to the flow velocity of the medium.

Every vortex creates a small negative pressure which is detected by a capacitive pressure pick-up and converted into an electrical pulse. A downline transducer converts the pulse signal into a standard output signal.

The sensor's special design eliminates vibrations in the pipe-line (< 1 g to 500 Hz) by means of a primary compensation. This means that it is not necessary to adjust either the device or the zero-point.

The necessary intake and output lengths can be shortened using the separately available flow straighteners.

Specifications

Accuracy

  • < 1 % - Gas/Steam
  • ± 0.75 %

Ambient Temperature Range

  • -40° to 85° C (-40° to 185° F)

Applications

  • Chemical Processing
  • Heat Supply
  • Mechanical Engineering
  • Petrochemical Plants
  • Power Plants

Approvals & Certifications

  • EN 1092-1

BSP Connection

  • G 1/2"

Cable Entry

  • M20×1.5

Display

  • 2 Line × 16-Characters
  • LCD Display

Enclosure / Body Material

  • Varnished Aluminum Die Cast

Environmental Protection

  • IP67

Flange Material

  • 316 Stainless Steel

Flange Size - 1" (DN 25)

  • 1" (DN 25) - ANSI Class 150
  • 1" (DN 25) - ANSI Class 300
  • 1" (DN 25) - PN 16
  • 1" (DN 25) - PN 40

Flange Size - 1/2" (DN 15)

  • 1/2" (DN 15) - ANSI Class 150
  • 1/2" (DN 15) - ANSI Class 300
  • 1/2" (DN 15) - PN 16
  • 1/2" (DN 15) - PN 40

Flange Size - 10" (DN 250)

  • 10" (DN 250) - ANSI Class 150
  • 10" (DN 250) - ANSI Class 300
  • 10" (DN 250) - PN 16
  • 10" (DN 250) - PN 40

Flange Size - 1-1/2" (DN 40)

  • 1-1/2" (DN 40) - ANSI Class 150
  • 1-1/2" (DN 40) - ANSI Class 300
  • 1-1/2" (DN 40) - PN 16
  • 1-1/2" (DN 40) - PN 40

Flange Size - 12" (DN 300)

  • 12" (DN 300) - PN 16
  • 12" (DN 300) - PN 25
  • 12" (DN 300) - PN 40

Flange Size - 2" (DN 50)

  • 2" (DN 50) - ANSI Class 150
  • 2" (DN 50) - ANSI Class 300
  • 2" (DN 50) - PN 16
  • 2" (DN 50) - PN 40

Flange Size - 3" (DN 80)

  • 3" (DN 80) - ANSI Class 150
  • 3" (DN 80) - ANSI Class 300
  • 3" (DN 80) - PN 16
  • 3" (DN 80) - PN 40

Flange Size - 4" (DN 100)

  • 4" (DN 100) - ANSI Class 150
  • 4" (DN 100) - ANSI Class 300
  • 4" (DN 100) - PN 16
  • 4" (DN 100) - PN 40

Flange Size - 6" (DN 150)

  • 6" (DN 150) - ANSI Class 150
  • 6" (DN 150) - ANSI Class 300
  • 6" (DN 150) - PN 16
  • 6" (DN 150) - PN 40

Flange Size - 8" (DN 200)

  • 8" (DN 200) - PN 10
  • 8" (DN 200) - PN 16
  • 8" (DN 200) - PN 25
  • 8" (DN 200) - PN 40

Load Limit

  • 500 ohms, Maximum

Materials of Construction

  • 316L Stainless Steel - Measuring Tube

Media

  • Gas
  • Liquids
  • Saturated Steam
  • Steam

Nominal Pressure

  • PN 40

NPT Connection

  • 1/2" NPT

Output

  • 36 Vdc
  • 4-20 mA with HART, 2-Wire

Power Requirement

  • 12-36 Vdc - without HART
  • 18-36 Vdc - with HART

Repeatability

  • ± 0.25 %

Seat / Seal Material

  • FPM
  • Graphite
  • Kalrez
  • PTFE

Sensor / Probe Material

  • 316L Stainless Steel

Temperature Effect

  • 0.005 %/°C

Temperature Range

  • -200° to 400° C (-328° to 752° F)

Vibration

  • 1 G, 10 to 500 Hz

Documentation

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