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APPX. 2 FRP/ALUMINUM RETRAC-
TION TANK INSTALLATION
Keep the following points in mind when installing the FSV-25 inside a FRP/aluminum retraction
tank.
• FURUNO does not supply any type of FRP/aluminum retraction tank.
Keep in mind the structural integrity and waterproofing of the vessel when fabricating a FRP/
aluminum tank. FURUNO takes no responsibility for the fabrication or design of the FRP/alumi-
num tank.
• The tank flange must be as smooth as possible. Peaks
and troughs should be 0.5 mm or less.
• The term "liquid gasket" refers to the sealant recom-
mended by the fabricator.
• Use a Joint Sheet equivalent to "Tombo No. 1995
CLINSIL - Brown" as the waterproofing gasket.
• For FRP retraction tank, use a reinforced FRP retraction tank whose flange is reinforced with
steel member.
Reinforced FRP retraction tank
• For aluminum retraction tank, the thickness of the tank must be 20 mm or more. Also, insulate
the hull unit and the retraction tank to prevent corrosion of the hull.
AP-2
Waterproofing gasket dimensions
FRP retraction tank
(non-reinforced flange rib)
Hull unit
Waterproofing gasket/
Liquid gasket
Insulated spacer
Aluminum retraction tank
Insulated gasket
24-ø23mm
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