BGN Variable Area Flowmeter/Counter

Brand: KOBOLD Instruments, Inc.

The KOBOLD BGN full metal variable area flowmeter and counter is suitable for flow measurement of liquid or gaseous products in pipes. It shows the current flow rate in volume or mass per unit in time.

Functions
The fluid flows from bottom to top through the meter tube of the flowmeter. The float is lifted until an annular gap between the meter ring and the cone-shaped float is produced which corresponds to the flow.

The forces acting on the float are in equilibrium. The forces that are mainly acting on the float comprise buoyancy according to the principle of Archimedes, the flow force of the medium and the weight force.

Each position of the float corresponds to a flow value measured during calibration, which is transferred to a scale.

The BGN variable area flowmeter consists of a meter tube with connections, a meter ring, and a conical float. By means of a magnet, the position of the float is transferred to an encapsulated follow magnet, which has been fitted to a pointer axle. The position of a second annular follow magnet fitted on the pointer axle is transferred to the scale by means of the pointer.
Features
  • A Large Spectrum of Wetted Materials
  • Magneto-Resistive Signal Transmission
  • Gas or Liquid Damping (Option)
  • Special Design for High-Pressure and High Temperature Applications
  • Excellent Heat Tracing Technology (Option)
  • Double Eddy Current Damping (Special Version)
  • Self Draining (Special Version)
  • Backflow Stop (Special Version)
  • Flow Controller (Special Version)

Specifications

Accuracy

  • ± 1.6 % of Full Scale (BGN-S/H) - Liquid
  • ± 1.8 % of Full Range (BGN-S/H) - Gas
  • ± 2.0 % of Full Scale (BGN-P) - Liquid
  • ± 2.2 % of Full Range (BGN-P) - Gas

Ambient Temperature Range

  • -40° to 80° C (-40° to 176° F)

Approvals & Certifications

  • ASME B16.5, ASME Class 150 & ASME Class 150/300
  • BVS 03-ATEX-H/B 112
  • CE-Marking - Pressure Equipment Directive 97/23/Eg & 94/9/EG
  • DMT 00-ATEX-E 075
  • Ex
  • Ex II 2 G EEx ia IIC T6
  • SIL

Configuration

  • Transmitter - ES with Fieldbus Foundation
  • Transmitter - ES with HART-Protocol, Protocol & Counter Module, 2 NAMUR-Switches & 1 NAMUR-Switches / 1 Pulse Output
  • Transmitter - ES with PROFIBUS PA

Electrical Connectors

  • DIN 2512

Enclosure, Body Material

  • Aluminum
  • Stainless Steel

Environmental Protection

  • IP65
  • IP67

Flange Size - 1" (DN 25)

  • 1" (DN 25) - PN 40

Flange Size - 1/2" (DN 15)

  • 1/2" (DN 15) - PN 40

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

  • 1-1/2" (DN 40) - PN 40

Flange Size - 2" (DN 50)

  • 2" (DN 50) - PN 40

Flange Size - 3" (DN 80)

  • 3" (DN 80) - PN 40

Flange Size - 4" (DN 100)

  • 4" (DN 100) - PN 16

Flange Size - 5" (DN 125)

  • 5" (DN 125) - PN 16

Flange Size - 6" (DN 150)

  • 6" (DN 150) - PN 16

Flow Rate

  • 0.015 to 2,400 Nm³/hour - Air
  • 0.5 to 1,30,000 L/hour - Liquids

Input

  • Input Binary - Counter Reset

Materials of Construction

  • 316 Stainless Steel - Display
  • Aluminum (Stove-Enameled) - Display

Nominal Pressure

  • psi: 580.2 (bar: 40, kPa: 4,000)

Output

  • Galvanically Isolated
  • Passive

Output Function

  • Inductive Switch, SJ 3,5-N NAMUR (Standard)
  • Inductive Switch, SJ 3,5-SN NAMUR (Safety Design)
  • Microswitch

Power Requirement

  • 14-30 Vdc
  • 4-20 mA

Process Temperature

  • -40° to 350° C (-40° to 662° F)

Repeatability

  • ± 0.5 % of Full Scale

Sensor, Probe Material

  • 316 Titanium Stainless Steel
  • 316L Stainless Steel
  • Hastelloy C-22
  • PTFE

  • Flow measurement, monitoring, adjusting and control of liquid and gaseous products. 
  • The meter's design makes it ideal for processes under difficult and rough operating conditions.

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