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Installation and Maintenance Manual form 185
3.0
SPECIAL INSTALLATIONS
3.1
COFFERDAM INSTALLATION WITH
COMPRESSION SEALING KIT
3.1.1
Place a continuous bead of sealant around the
header gasket that separates the GRIDCOOLER®
unit from the outer hull. Customers have reported
good success with polysulfide rubber sealants.
3.1.2
Place a second continuous bead of sealant on the
inner hull around the nipple. This bead must be in
contact with the hull and the nipple.
3.1.3
Hoist the unit up into the mounting position. The
exterior header gasket must be in full contact with
the hull.
3.1.4
Place the nipple gasket (harder of the two interior
gaskets) down over the nozzle as far as possible.
3.1.5
Place the unfinished cast washer down over the
nipple as far as possible. The side of the washer
marked “up” must face away from the hull.
3.1.6
Place the compression gasket (softer of the two
interior gaskets) down over the nipple as far as
possible.
3.1.7
Place the semi-finished washer down over the nipple,
finished side away from the hull.
3.1.8
Run the nut down over the nipple and torque to
spec. (See chart in Section 2.3.2)
3.1.9
Torque the nut to spec a second time after the
sealant has set.
FIG.15 Compression Sealing Parts Replacement
