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KROHNE Optisonic 3000 Ultrasonic Flow Meter - VN634
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KROHNE Optisonic 3000 Ultrasonic Flow Meter - VN634

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The OPTISONIC 3400 is a 3-path ultrasonic inline flowmeter designed for a wide range of standard or more demanding process applications with homogeneous, non-viscous aqueous liquids as well as viscous fluids of up to over 1000 cSt. It is also the perfect choice for applications with cryogenic products (as low as -200°C / -328°F), media with extended temperature ranges (up to +250°C / +482°F) as well as low or extreme pressure ratings. The OPTISONIC 3400 offers a broad range of diameters – from DN25 / 1" for dosing purposes to DN3000 / 120" for water transportation pipelines.

Based on the transit time method, the 3 parallel acoustic paths of the flowmeter allow bi-directional measurement independent of flow profile for high accuracy even under less favourable flow profile conditions (e.g. short inlet and outlet runs). By means of the velocity of sound, the device is also able to identify process changes or liquid pollution. Its fully welded construction does not cause any pressure loss and is maintenance-free. The OPTISONIC 3400 is available with flange as well as welded connections. It features enhanced diagnostics and provides various digital communication options.


  • Nominal Diameter
  • Nominal Pressure
  • Ex-Approval
  • Design
  • Converter
  • Tube/Flange Material
  • Cable Length
  • Calibration
  • Housing
  • Finish
  • Protection Class
  • Custody Transfer
  • Tagplate
  • Process Temperature
  • Viscosity
  • SIL

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Product Datasheets

Datasheet 1

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The OPTISONIC 3400 is a 3-path ultrasonic inline flowmeter designed for a wide range of standard or more demanding process applications with homogeneous, non-viscous aqueous liquids as well as viscous fluids of up to over 1000 cSt. It is also the perfect choice for applications with cryogenic products (as low as -200°C / -328°F), media with extended temperature ranges (up to +250°C / +482°F) as well as low or extreme pressure ratings. The OPTISONIC 3400 offers a broad range of diameters – from DN25 / 1" for dosing purposes to DN3000 / 120" for water transportation pipelines.

Based on the transit time method, the 3 parallel acoustic paths of the flowmeter allow bi-directional measurement independent of flow profile for high accuracy even under less favourable flow profile conditions (e.g. short inlet and outlet runs). By means of the velocity of sound, the device is also able to identify process changes or liquid pollution. Its fully welded construction does not cause any pressure loss and is maintenance-free. The OPTISONIC 3400 is available with flange as well as welded connections. It features enhanced diagnostics and provides various digital communication options.

Specifications

Optisonic 3000
Nominal Diameter [VN634H] DN 350 | 14", [VN634K] DN 400 | 16", [VN634L] DN 450 | 18", [VN634M] DN 500 | 20", [VN634N] DN 600 | 24", [VN634P] DN 700 | 28", [VN634R] DN 800 | 32", [VN634S] DN 900 | 36"
Tube/Flange Material [C] 14" - Steel - 150lb, [B] 14" - 316L Stainless Steel - 150lb, [C] 16" - Steel - 150lb, [B] 16" - 316L Stainless Steel - 150lb, [C] 18" - Steel - 150lb, [B] 18" - 316L Stainless Steel - 150lb, [C] 20" - Steel - 150lb, [B] 20" - 316L Stainless Steel - 150lb, [C] 24" - Steel - 150lb, [B] 24" - 316L Stainless Steel - 150lb, [C] 28" - Steel - 150lb, [C] 32" - Steel - 150lb, [C] 36" - Steel - 150lb, [C] 14" - Steel - 300lb, [B] 14" - 316L Stainless Steel - 300lb, [C] 16" - Steel - 300lb, [B] 16" - 316L Stainless Steel - 300lb, [C] 18" - Steel - 300lb, [B] 18" - 316L Stainless Steel - 300lb, [C] 20" - Steel - 300lb, [B] 20" - 316L Stainless Steel - 300lb, [C] 24" - Steel - 300lb, [B] 24" - 316L Stainless Steel - 300lb, [C] 14" - Steel - 600lb, [B] 14" - 316L Stainless Steel - 600lb, [C] 16" - Steel - 600lb, [B] 16" - 316L Stainless Steel - 600lb, [C] 18" - Steel - 600lb, [B] 18" - 316L Stainless Steel - 600lb, [C] 20" - Steel - 600lb, [B] 20" - 316L Stainless Steel - 600lb, [C] 24" - Steel - 600lb, [B] 24" - 316L Stainless Steel - 600lb
Optisonic 3000 - VN634
Nominal Pressure [A] 150 lb RF ASME B 16.5, [B] 300 lb RF ASME B 16.5, [D] 600 lb RF ASME B 16.5, [A] 150 lb RF ASME B 16.47 A, [B] 300 lb RF ASME B 16.47 A, [D] 600 lb RF ASME B 16.47 A
Ex-Approval [0] without, [4] CSAus Class 1 DIV 1 (US), [B] cCSAus Class 1 DIV 1 - Dual Seal (US & Canada), [1] ATEX Zone 1, [F] IECEx Zone 1
Design [1] Compact Converter, [2] Compact Converter w/ Heavy Duty Neck for SS Converters, [4] Remote Converter w/ Aluminum Connection Box - 1/2" NPT, [6] Remote Converter w/ Aluminum Connection Box - M20 x 1.5, [A] Remote Converter w/ Stainless Steel Connection Box - 1/2" NPT, [C] Remote Converter w/ Stainless Steel Connection Box - M20 x 1.5
Converter [1] UFC 400C-v2 - Compact/Integral Mount, [2] UFC 400F-v2 - Field Mount, [0] without
Cable Length [0] Compact - none, [0] 5m | 15ft, [1] 10m | 30ft, [2] 15m | 45ft, [3] 20m | 60ft, [4] 25m | 75ft, [5] 30m | 90ft
Calibration [0] 2 Points with Water, [2] 3 Points with Water acc. ISO/IEC 17025 on Accredited Calibration Facility, [6] 6 Points with Water, 1 Point with 3 Results (2 Repeats), [7] 6 Points with Water Bidirectional, 1 Point with 3 Results Bidirectional, [M] 3 Points acc. to MI-004, Cl. 2 - 14", [N] 3 Points acc. to MI-004, Cl. 1 - 14", [M] 3 Points acc. to MI-004, Cl. 2 - 16", [N] 3 Points acc. to MI-004, Cl. 1 - 16", [M] 3 Points acc. to MI-004, Cl. 2 - 18", [N] 3 Points acc. to MI-004, Cl. 1 - 18", [M] 3 Points acc. to MI-004, Cl. 2 - 20", [N] 3 Points acc. to MI-004, Cl. 1 - 20", [M] 3 Points acc. to MI-004, Cl. 2 - 24", [N] 3 Points acc. to MI-004, Cl. 1 - 24", [M] 3 Points acc. to MI-004, Cl. 2 - 28", [N] 3 Points acc. to MI-004, Cl. 1 - 28", [M] 3 Points acc. to MI-004, Cl. 2 - 32", [N] 3 Points acc. to MI-004, Cl. 1 - 32", [M] 3 Points acc. to MI-004, Cl. 2 - 36", [N] 3 Points acc. to MI-004, Cl. 1 - 36"
Housing [00] Steel, [20] 316L Stainless Steel
Finish [1] Standard, Grey, [2] Blasted (Not Coated, incl. Corrosion Preservative), [3] Offshore, Grey - 14", [3] Offshore, Grey - 16", [3] Offshore, Grey - 18", [3] Offshore, Grey - 20", [3] Offshore, Grey - 24", [3] Offshore, Grey - 28", [3] Offshore, Grey - 32", [3] Offshore, Grey - 36"
Protection Class [000] IP66/67, [200] IP68
Custody Transfer [0] without, [K] Water - Hot, acc. MI-004 EU
Tagplate [03] without - Tag Info on Foiled Nameplate, [23] 316|1.4401 tagplate ( 120 x 46 mm ), [33] 316|1.4401 tagplate ( 67 x 25 mm )
Process Temperature [0] Standard - max 180°C | 356°F, [1] 14" Extended (XXT) - max 250°C | 480°F, [2] 14" Cryogenic (LT) - min -200°C | -318°F, [1] 16" Extended (XXT) - max 250°C | 480°F, [2] 16" Cryogenic (LT) - min -200°C | -318°F, [1] 18" Extended (XXT) - max 250°C | 480°F, [2] 18" Cryogenic (LT) - min -200°C | -318°F, [1] 20" Extended (XXT) - max 250°C | 480°F, [2] 20" Cryogenic (LT) - min -200°C | -318°F, [1] 24" Extended (XXT) - max 250°C | 480°F, [2] 24" Cryogenic (LT) - min -200°C | -318°F
Viscosity [00000] Standard - max 100cSt, [30000] High Viscosity
SIL [00] without, [S0] SIL PIU