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Funke

Funke FP 04 50kW LO cooling

Name: Funke Funke FP 04 50kW LO cooling
Brand: Funke
SKU: OSE-79166

Funke Funke FP 04 50kW LO cooling — Heat Exchangers, LO cooling.

Inspector Detail

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Common issues

Fouling/scaling on the cooling water side reducing heat transfer efficiency
Gasket degradation or hardening leading to inter-plate leakage or cross-contamination between oil and water circuits
Plate corrosion or pitting, particularly with untreated or brackish cooling water
Reduced LO outlet temperature control from partial flow channel blockage
Temperature control (bypass/three-way) valve malfunction causing unstable LO temperature
Fatigue cracking of the plate pack under repeated thermal cycling

Inspection checklist

Monitor LO inlet/outlet temperature differential and compare against baseline
Check for external leakage at the plate pack frame and connections
Trend pressure drop across the exchanger (rising differential indicates fouling)
Inspect gaskets for hardening, extrusion, or visible damage at overhaul
Open and mechanically/chemically clean plates per maker schedule
Verify tie-bolt torque on the plate pack frame
Check temperature control valve function
Sample for cross-contamination (oil in cooling water or vice versa)

Service intervals

External leak/visual inspection	monthly
Performance trend review (temperature differential, pressure drop)	monthly
Plate pack opening and cleaning	annually, or when performance drop indicates fouling, per maker schedule
Gasket renewal	at each plate pack opening or per maker recommendation, typically every 3-5 years
Tie-bolt torque check	at each plate pack reassembly

Typical wear limits

Heat transfer performance drop before cleaning	typically flagged at roughly 10-15% below the commissioning baseline temperature differential - confirm against the maker's design data
Pressure drop increase before cleaning	typically flagged when differential pressure exceeds design value by roughly 20-30% - confirm against the maker's design data

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

Critical spares

Full gasket set for the plate pack
Spare plates (a maker-recommended percentage of the pack)
Tie-bolt set
Temperature control valve repair kit

Safety

Hot lube oil circuit - burn risk when opening the plate pack shortly after operation
Incorrect tie-bolt torque during reassembly can cause plate pack leakage or gasket blow-out under pressure
Pressurized system - isolate and depressurize/drain before opening
Check for oil sheen in the cooling water discharge as an indicator of gasket failure/cross-contamination

Class survey

Class surveys typically check for external leakage, review pressure/temperature trend records where logged, and for exchangers serving essential systems (e.g. main engine LO cooling) confirm the arrangement matches the approved cooling system diagram.

Estimated lifetime: Plate heat exchanger frames typically remain in service 15-20+ years with periodic plate and gasket renewal; individual plates are a condition-based consumable rather than having a fixed running-hour life