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Japanese craftsmanship company

Trouble Shooting

Trouble shooting

Situation Possible causePossible solution
Inadequate thermal performance at startup - Air pockets
- Insufficient service fluid
- Vent the unit
- Check flow rates and temperatures
Decreasing thermal performance with in conjunction with an increased pressure drop or a reduced flow rate - Fouling on heat-transfer surface - Clean the unit and adjust flow rates to specified levels
Decreasing thermal performance with reduced pressure drop -Bypass from one turn to the other caused by damaged cover gasket
- Excessive operating pressure
- Replace the cover gasket
- Adjust pressure to specified level
Excessive pressure drop with maintained thermal performance - Inlet or outlet is blocked - Clean the spiral
External leakage - Damaged cover gasket
- Insufficient pipe support(Vibration)
- Relaxation of cover gasket during shut-down
- Thermal expansion during start-up
- Replace the cover gasket
- Adjust pipe support system
- Tighten hook bolts
- Tighten hook bolts. If leakage persists,
check cover gasket
Internal leakage - Heat-transfer area is damaged by erosion, corrosion or mechanical impact - Contact KUROSE for advice.
( There is one possible for field repair. )

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