M10-MAX

Common issues

• Gasket hardening or extrusion leading to external leakage at the plate pack edge
• Seawater-side fouling (scaling or biofouling) reducing heat transfer
• Inter-plate leakage causing cross-contamination between the two media
• Pitting or erosion corrosion of plates, particularly on the seawater side
• Tie-bolt loosening over time from thermal cycling, allowing gasket weep
• Loss of cooling capacity flagged by rising LT/HT cooling water temperature

Inspection checklist

• Check for external weeping at the gasket line around the plate pack
• Monitor differential temperature/pressure across the unit for fouling trend
• Measure and record plate pack tightening (compressed) dimension against nameplate value
• Inspect gaskets for hardening, cracking or extrusion when opened
• Check plates for pitting or erosion, especially first few plates on seawater side
• Verify frame bolts/tie bolts are torqued evenly
• Check sacrificial anode condition if fitted
• Inspect connection flanges and instrument tappings for leaks
• Confirm no cross-contamination via test/drain ports between circuits

Service intervals

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

Typical wear limits

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

Critical spares

• Complete gasket set for the plate pack
• Individual replacement plates
• Tie bolts and nuts
• Connector/branch seals
• Sacrificial anodes (if fitted)

Safety

• Hot HT-side fluid can cause burns if the unit is opened before cooling down
• Plate pack is held under spring/bolt tension - crush and pinch risk when loosening tie bolts
• Heavy individual plates during handling - manual handling injury risk
• Chemical cleaning agents used for descaling require PPE and ventilation

Class survey

Central coolers serving essential cooling systems are typically included under Continuous Machinery Survey; a pressure/leak test is normally expected after any gasket renewal or plate replacement, and fouling/performance trend records support survey credit where the vessel is enrolled in a condition-based scheme.

Estimated lifetime: Plates typically remain in service 10-20 years depending on fouling and water quality; gaskets are shorter-lived, commonly 3-8 years depending on temperature and media.