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Hose Handling Crane - Overhaul of PVG 32 Control Valve Block

The VLCC Tanker was undergoing dry-dock repairs at Keppel Tuas Ship Yard in Tuas. On board are 2 hose handling cranes, Make MacGREGOR, type HH 630-2020-4, SWL 20T x 20M, as well as provision cranes GP 100-0217.5-2 and GP 250-1017.5-2.
ALATAS Singapore was tasked to carry out 5 yearly crane, maintenance. Among others the job scope includes component overhaul, replacement of all hydr hoses and load testing.

Also the proportional control valves, Make Sauer Danfoss, type PVG 32 where found corroded and had to be fully overhauled. Hydraulic Valve Repair, overhaul and testing was carried out by our specialized valve repair workshop.
The valve repair- & test report is here: PVG32 Control Valve Repair Report

This is what the tanker owner had to say upon successful conclusion of the repairs:

" Thank you for the excellent job carried out on all deck Cranes on board our Vessel . Please express our appreciation to your lead engineer and his team.
The attached Service Reports for the Cranes and the Control Valve Blocks are highly professional. Without hesitation will we continue your recommend your services and will recommend you as professional crane service organization"

 

     
 
 

x2 PVG32 Control Valve from 20ton Mid Ship Hose Handling Crane (Port & Stbd)

  Unit completely dismantled
  Unit completely dismantled
 
 
 

Additional Pictures showing the defects

 

Worn out O-rings

  Mechanical Actuation found defective and corroded
 
 
 

x2 PVG32 Control Valve from 2ton & 10ton Prov Crane (upon arrival)

 

Control Valve and Emergency Valve from 10ton Crane.

  Unit completely dismantled
 
 
 

Unit completely dismantled

 

Control Valve and Emergency Valve from 2ton Crane.

  Unit completely dismantled
 
 
 

Unit completely dismantled

 

New parts arrived and re-assembly in progress for Port side control valve.

 

New parts arrived and re-assembly in progress for Stbd side control valve.

 
 
 

Unit (Stbd) re-assembled and pressure tested.

 

Unit (Port) re-assembled and pressure tested.

  Units painted with x1 layer of marine grade primer and delivered on-board vessel.
 
 
 

New parts arrived and re-assembled control valve.

 

Emergency Valve (10ton Prov. Crane) re-assembled and painted with primer.

  10ton Prov crane control valve block completely re-assembled and pressure tested
 
 
 

New parts arrived and re-assembled control valve & pressure tested accordingly.

 

Units painted with x1 layer of marine grade primer and delivered on-board vessel.

 

-x2 new Ball Valves were replaced
-x1 new spring inserted.

Units painted with x1 layer of marine grade primer and delivered on-board vessel.

 
       

 

 
 
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