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CB200 Series

Brazed Plate Heat Exchanger · Heat Exchangers

Class-certified type (DNV register) · technical data sheet not yet verified​‌​⁠‌​​‍‌​‍⁠​⁠​⁠⁠‍‍​

Alfa Laval CB200 Series — Alfa Laval Brazed & Fusion-Bonded Plate Heat Exchanger (CB / AlfaNova). Alfa Laval's brazed and fusion-bonded plate heat exchangers are compact, high-efficiency units for demanding marine and industrial applications. CB models employ stainless steel plates brazed with 100% copper in vacuum furnaces, while AlfaNova uses patented AlfaFusion technology combining all-stainless-steel construction (316) with stainless steel

Specifications

Technical data.

Do you have the manufacturer datasheet for this model? Send it with the enquiry form — we check it and name the source.

Heat Exchanger TypeAlfa Laval Brazed & Fusion-Bonded Plate Heat Exchanger (CB / AlfaNova)
Inspection

Inspector Detail

Common issues

  • Selecting a copper-brazed CB-series unit for a raw seawater duty when a fusion-bonded AlfaNova core is needed for that corrosion environment
  • Progressive fouling on either circuit narrowing the approach temperature over time
  • Brazed joint fatigue leakage after long service, especially where thermal cycling is frequent (start/stop duties)
  • Plate pack blockage from particulate ingress when upstream strainers are undersized or poorly maintained
  • External corrosion at carbon steel piping/flange connections if coatings are not kept up
  • Reduced performance from incorrect flow direction or an undersized unit for the actual duty load

Inspection checklist

  • Confirm which core material (copper-brazed CB vs 100% stainless AlfaNova) is actually fitted before assuming duty suitability
  • Trend the approach temperature and pressure drop against commissioning figures
  • Inspect brazed seams for weeping, staining or corrosion
  • Check upstream strainers for condition and cleaning frequency
  • Verify the nameplate pressure rating matches the system's operating pressure
  • Sample both circuits periodically for cross-contamination
  • Inspect supports and connections for vibration fatigue

Service intervals

Performance trend review (approach temp / pressure drop)monthly to quarterly depending on service criticality
Strainer cleaning upstreammonthly to quarterly depending on water source
CIP chemical cleaningcondition-based, commonly every 6-24 months
Nameplate/material data verification against dutyat each major maintenance or whenever the unit's service is changed

Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.

Typical wear limits

Pressure drop rise vs commissioning baselinecommonly used as a cleaning trigger around 20-40% above baseline - unit-specific, not a fixed figure
Approach temperature rise vs designa sustained few-degree C rise above design is a typical fouling indicator
Core material corrosion evidenceany visible copper braze corrosion on a unit meant for raw seawater duty indicates the wrong core material was fitted, which is a limit in itself, not a numeric one

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

  • Isolation valves for both circuits
  • Strainer elements
  • Flange gasket sets
  • Monitoring instrumentation (pressure/temperature)
  • A like-for-like replacement core, since neither CB nor AlfaNova units are field-repairable internally

Safety

  • Never exceed the nameplate design pressure when pressure testing
  • Isolate and vent before breaking connections - trapped pressure and thermal expansion
  • Confirm the fitted core material is corrosion-appropriate for the duty before use - the wrong material choice is a corrosion failure risk, not just a performance one

Class survey

As a family of pressure-retaining heat exchangers, class attention is on correct material certification for the actual duty (especially seawater contact), pressure test records, and general piping/machinery survey coverage rather than a dedicated survey item, unless the unit serves a class-essential system.

Estimated lifetime: Not meaningfully expressed in running hours across this family - service life is governed by fouling/corrosion condition rather than a fixed schedule; correctly specified units commonly remain in service 15-25 years with regular cleaning.

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Free of charge — send us your request for Alfa Laval equipment. Our team checks it and replies by e-mail.

For marine equipment hardly any maker or authorised dealer will name a price while the vessel is unknown. With the vessel details, availability and price can be settled faster; without them we may have to ask first, which costs a few days. If you are not allowed to name the vessel, a photo of the rating plate is enough — attach it below or send it as a reply to our confirmation e-mail.

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