2019
— 18 —
BRIG
l
REINFORCED BUOYANCY TUBE.
5
6
8
7
4
1
2
3
D3
The boat buoyancy tube has U-shaped form. The tube is separated by
means of inner elastic partitions into five chambers of a similar volume,
each being provided with an air fill valve.
The air fill valve is intended for:
— filling the compartment with air from a standard pump or filling system
and maintaining pressure in the tube for prolonged time,
— adjustable drop of pressure in compartment.
The air fill valve is designed as a tab-type non-return valve and consists
of the following components (Fig. D3):
— housing (1);
— cup (2) with strap (3);
— washer with gasket (4);
— nut (5);
— spindle (6) with spring (7) and cup diaphragm (8).
Also there are the following elements fitted on the tube (Fig. D1):
— doubled rubbing strake (3, Fig.D1);
— safety handles (4, Fig.D1);
— bow step-plate with a special moulded antiskid coating (6, Fig.D1).
