15-B
97MU001-F
ANTHEA OPERATION AND INSTALLATION MANUAL
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2.4 WELDED-TO-HULL-FITTING WITHOUT VALVE TYPE 48.1.RI WITH 48.1.RB
SENSOR
(Drawing n° C1287)
1/ Drill a 77 mm diameter hole in the hull. Do an external chamfer of 5 mm (45°) for welding.
2/ Position hull-casing (1). To obtain accurate positioning, follow suggested procedure on the
drawing. After three or four spots have been welded on internal side of hull, remove the
mechanical system and check the positioning. Hull-casing must be flush with the hull. After
welding, grind the external seam on a level with hull surface in order to allow piece (16) to
butt on piece (1).
IMPORTANT : Hull-fitting mechanical tolerances are adjusted. In order to avoid any
destroying risk, do not heat the hull-fitting when welding it.
3/ Fill the inner part of outer bush ref (16) with self polymerizing silicone rubber. Fill only the
part indicated on the drawing. Replace the bush, check that bush is properly engaged and that
nothing protrudes. Test the clearance by introducing the sensor preferably from outside. Let
the paste harden.
In most cases, lower flange (2) is already welded to hull casing (1).
4/ Weld the thru-bolts (3).
5/ Grease 0-ring (13) and position it.
6/ Do not forget flat seal (7). Introduce and grease the sensor. Install sensor-flange (8). Screw
the thru-bolts with (19) + (18). Do not forget circlips (15).
Attention : To introduce sensor, use grease supplied with spares. When using anti-
fouling paint, DO NOT PAINT THE ELECTRODES, DO NOT GREASE THE
ELECTRODES. When properly positioned, the sensitive surface of the sensor protrudes
at least 1 mm from external bush. The red mark on the sensor head is directed towards
the fore of the vessel.
