Kobold Variable Area Flowmeter/Switch (125-500 L/hr), V31
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V31 Variable Area Flowmeter/Switch (125-500 L/hr)

Brand: KOBOLD Instruments, Inc
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Kobold Variable Area Flowmeter/Switch (125-500 L/hr), V31
The measuring element is composed of a float and a conical glass tube. A medium flows from the bottom to the top through the measuring ring, lifting the float until the buoyancy force and the weight of the float establish equilibrium. 

The height of the float in the measuring ring is the measure of the flow. The flow rate is read directly from a scale inscribed on the glass. 

The readings obtained apply solely to the medium for which the device has been calibrated or for a medium with the same density and viscosity.

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Specifications

Brand

Accuracy

  • 1.6 % - Liquids
  • 2.5 % - Gases
  • qG = 50 %

Ambient Temperature Range

  • -20° to 80° C (-4° to 176° F)

Applications

  • Dosing
  • Flow Metering
  • Gas Service
  • Liquid Service
  • Monitoring

Approvals & Certifications

  • ATEX 2 GD IIC TX (BVS 10-ATEX-H/B 119)
  • EN 1092

Approvals & Certifications

  • Inspection Report
  • Works Certificate

BSP Connection

  • G 1/2” Female
  • G 1/4” Female
  • G 3/8” Female

Connection Material

  • 316Ti Stainless Steel
  • PVC
  • PVDF

Connection Style

  • Glue

Electrical Contacts

  • Inductive Contact
  • Normally Closed & Normally Open
  • Reed Contact

Electrical Rating

  • 250 Vac / 0.5 A / 10 VA
  • 250 Vac/dc / 1.5 A / 150 VA / 100 W
  • 250 Vdc / 0.5 A / 5 W
  • 5-25 Vdc

Enclosure / Body Material

  • 304L Stainless Steel

Environmental Protection

  • Weatherproof

Flange Size - 1” (DN 25)

  • 1” (DN 25) - ASME B16.5 Class 150
  • 1” (DN 25) - PN 10
  • 1” (DN 25) - PN 16
  • 1” (DN 25) - PN 25
  • 1” (DN 25) - PN 40

Flange Size - 1/2” (DN 15)

  • 1/2” (DN 15) - ASME B16.5 Class 150
  • 1/2” (DN 15) - PN 10
  • 1/2” (DN 15) - PN 16
  • 1/2” (DN 15) - PN 25
  • 1/2” (DN 15) - PN 40

Flange Size - 3/4” (DN 20)

  • 3/4” (DN 20) - ASME B16.5 Class 150
  • 3/4” (DN 20) - PN 10
  • 3/4” (DN 20) - PN 16
  • 3/4” (DN 20) - PN 25
  • 3/4” (DN 20) - PN 40

Flange Size - 3/8” (DN 10)

  • 3/4” (DN 10) - PN 10
  • 3/8” (DN 10) - PN 16
  • 3/8” (DN 10) - PN 25
  • 3/8” (DN 10) - PN 40

Flow Rate

  • 12.5-125 to 50-500 L/hr to Water - Stainless Steel Float
  • 150-1,500 to 550-5,500 NL/hr to Air - PVDF Float
  • 200-2,000 to 800-8,000 NL/hr to Air - Aluminum Float

Gasket Material

  • EPDM
  • FEP
  • FFKM
  • FKM
  • Perfluor
  • Viton

Length

  • 14.7” to 19.6” (375 to 500 mm)

Materials of Construction

  • 316 Stainless Steel - Float Stop
  • 316Ti Stainless Steel - Float, Float Guiding
  • Aluminum - Float
  • Borosilicate Glass - Measuring Tube
  • Polycarbonate - Shatter Protection
  • PVDF - Float, Float Stop

Media

  • Liquids & Gases

NPT Connection

  • 1/2” NPT Female
  • 1/4” NPT Female
  • 3/8” NPT Female

Pressure Range

  • psi: 36.26 to 217.6 (kPa: 250 to 1,500, bar: 2.5 to 15)

Process Temperature

  • -10° to 150° C (14° to 302° F) - Float Material Stainless Steel / Aluminum

Seat / Seal Material

  • EPDM
  • FEP
  • FFKM
  • Viton

Size

  • Diameter: 1/2” (12 mm) - Inner Diameter Ø 13
  • Diameter: 3/8” (9.5 mm) - Inner Diameter Ø 19

Storage Temperature

  • -10° to 60° C (14° to 140° F)

Switch Type

  • SPDT

Turndown

  • 1:10

Union Nut Material

  • Aluminum
  • Stainless Steel

Wetted Materials

  • PVDF
  • Stainless Steel

Documentation

Data Sheets

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