Maintenance and Servicing

The lifetime of the Plate Heat Exchanger can be extended with regular observations and inspections, especially on the parts and components. Below are some of the frequently observed faults and problems that can potentially hinder the overall performance of the Plate Heat Exchanger. If fault(s) is detected, please contact us (hyperlink to contact us page) and inform us on the unit manufacturing number to schedule a servicing appointment with our technical staff.

Problems:

- A reduced in hear transfer performance is an indication to the user to clean the plates. Plates cleaning are necessary in order to remove scales deposited on the plates over time due to supposing scaling on the heat transfer surface. Consequently, the overall heat transfer performance will be reduced once scaling occurs on the heat transfer surface.

- A reduced in flow performance is an indication of clogged port holes inlet and/or scaled plates. Therefore, regular inspections are necessary to restore the overall performance of the Plate Heat Exchanger with thorough cleaning and maintenance.

- It is possible that corrosion or damage to the intermediate plate will cause the counter-current flowing mediums to be intermixed. Hence, regular inspections are needed to prevent this phenomenon by replacing the damaged plates.

  1. Decreased Heat Transfer Performance
  2. Reduced Flow Performance
  3. Intermixing of two mediums
Faults:
Leakage of fluids

- From plate pack:

  • Insufficient tightening of the plate pack
  • Damaged or deteriorated gaskets
  • Corrosion at the plate gasket grove or double seal area
  • Wrong plate arrangement
  • Caught up of foreign material between gasket seal surfaces
  • Overlapping or twisting of gaskets from the groove

Aforementioned are possible reasons that may cause fluid leakage from the plate pack. Therefore, regular servicing and maintenance are important to ensure that the overall performances of the Plate Heat Exchanger are not compromised.

- From the S – Frame:

  • D – plate gasket
  • Rubber boots
  • D – plate or S – nozzle

If leakage is found from the S – frame due to aforementioned possible causes, then, it is necessary to replace the damaged part in order to restore the performance of the Plate Heat Exchanger.

Servicing Cycle:
Service packages

At HISAKA, we sincerely cater our servicing packages in order to meet the highest possible customer’s satisfactions from all customers, be it locally or internationally.

Kindly refer to the table below for the services being offered by HISAKA:

Description Package A Package B Package C Package D Package E
  Supervision only (by HISAKA Specialist) on: On site normal servicing: (HISAKA servicing, + at least 1 additional man-power required) On site chemical cleaning servicing: (HISAKA specialist, + at least 1 additional man-power required) Chemical cleaning servicing (send to HISAKA service center) CIP servicing (HISAKA specialist, + at least 1 additional man-power required)
Pre-test of received PHE to identify leak point (if any)       To provide CIP cleaning service on site
Dismantling the tightening bolts from the PHE Before CIP initiation, all inlet & outlet nozzle connections must be disconnected.
Plate removal from the PHE Using special HISAKA chemicals and CIP unit
Old gasket removal from the plates Upon CIP completion, the effluent generated from PHE will be brought back
Chemical soaking of plates      
Water rinsing with high pressure water jet/manual cleaning of plates
Dye-penetration testing to identity cracks, pin-hole (if any)        
Visual inspection of plates and gaskets  
Repair of minor deformed plates  
Regasketing onto the plates  
Tightening of PHE to original tightening length  
Online/on site testing of PHE to ensure no leakage
Neutralize the used chemical      
before it is drained          
Full servicing report
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