— 18 —
BRIG
REINFORCED BUOYANCY TUBE.
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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. D5): housing (1); cup (2) with strap (3);
washer with gasket (4); nut (5); spindle (6) with spring (7) and cup diaphragm
(8).
To fill the tube with air, use only the pump from the boat kit.
First fill all tube compartments to a pressure approximately of 0.1 bar. Then
bring the air pressure to nominal - 0.2bar (2.9psi).
Note that when the tube is heated by sunlight, the pressure can increase
significantly.
D5
IT IS FORBIDDEN to bring the tube pressure up to the value exceeding the rated one
(0.2 bar(2.9psi))
Always check the air pressure in the tube.
Be careful. Tube can be damaged with sharp objects.
Always have on board the means for repairing
the punctures and cuts of the tube
