VKG Viscosity Compensated Flowmeter/Switch

Brand: KOBOLD Instruments, Inc.

The KOBOLD flowmeters and switches model VKG have a spring-loaded float, which slides within a cylindrical measuring tube and has an integral orifice which is believed to be unique.

This and other design features means that it has for the first time become possible to create a flowmeter and switch which fully compensates for viscosity and to a large extent for density even with very low flows.

The float of these patented devices contain permanent magnets which actuate a potential free bistable reed contact mounted outside the flow, thus ensuring hermetic separation between the medium and the electrical contact system.

The contact is embedded within a height-adjustable plastic housing to prevent damage to the contacts by mechanical action or aggressive atmospheres.

Specifications

Accuracy

  • ± 4 % of Full Scale (For a Viscosity of 105 mm²/s)
  • ± 5 % of Full Scale, Maximum

Applications

  • Extruding Plant
  • Hydraulic Applications
  • Lubrication Circuits
  • Machine Tools
  • Oil Lubrication Circuits
  • Paper Machines
  • Printing Press

Approvals & Certifications

  • ATEX-Zone 1

BSP Connection

  • G 1" Female
  • G 1/2" Female
  • G 1/4" Female
  • G 3/4" Female

Connection Material

  • 304 Stainless Steel
  • Nickel-Plated Brass

Electrical Connectors

  • DIN EN 175301-803

Electrical Contacts

  • 1 Changeover Contact
  • 1 Normally Open Contact

Electrical Rating

  • 240 Vac / 0.42 A / 100 W, 100 Vac / 1 A / 100 W
  • Changeover Contact, Maximum
  • N/O Contact & Changeover Contact (cCSAus) - Maximum
  • N/O Contact, Maximum

Enclosure / Body Material

  • Aluminum Anodized (Not Media-Contacted)

Environmental Protection

  • IP54
  • IP65

Flow Rate

  • 0.1 to 80 L/minute Oil

Lens

  • Duran Glass - Measuring Glass

Materials of Construction

  • 304L Stainless Steel - Float
  • Nickel-Plated Brass - Float
  • Oxide Ceramic - Magnet

Maximum System Pressure

  • psi: 174 (kPa: 1,200, bar: 12)

NPT Connection

  • 1" NPT Female
  • 1/2" NPT Female
  • 1/4" NPT Female
  • 3/4" NPT Female

Orifice Material

  • 301 Stainless Steel

Process Fitting Details

  • Screwed Fitting

Seat / Seal Material

  • FPM
  • NBR

Spring Material

  • 301 Stainless Steel

Temperature Range

  • 100° C (212° F)

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