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PRESSURE
The correct pressure for the buoyancy tube and the AirLite keel is 240 mb / 3,48 PSI, and 800
mb / 11,3 PSI for the H2P inflatable floor.
If your boat is not equipped with an
ACCESS
pressure indicator, we recommend that you purchase
one from your Dealer. This will permit a quick and efficient control of the pressure during inflation.
Without a pressure indicator, stop inflating when the foot-pump gets difficult to operate, and the boat is
« hard » (you should not be able to bend the cone ends).
Ambient temperature of air and water
Ambient temperature
tubes’ internal pressure
have an effect on the boat’s internal
+1°C / +1,8°F
+4 mb / 0,06 PSI
pressure
-1°C / -1,8°F
-4 mb / 0,06 PSI
Therefore, it is important to anticipate:
Because of temperature variations (especially when this variation is important between the beginning
and the end of the day, in hot areas) check and adjust the pressure in the inflated compartments by
inflating or deflating. Be sure that pressure remains within the recommended pressure , between 220
mb / 3,10 PSI and 270 mb / 3,85 PSI.
RISK OF UNDERPRESSURE
EXAMPLE:
Your boat is in direct sunlight on the beach (temperature =50°C/122°F) at
recommended pressure (240 mb/3,48 PSI). after putting it in the colder water (temperature
=20°C/68°F), the internal temperature and pressure of the tubes will both drop (up to 120 mb/1,7
PSI) and
YOU WILL HAVE TO INFLATE AGAIN
until you regain the lost pressure due to the
difference in temperatures. Therefore, a loss of pressure, at the end of the day when ambient
temperature drops, is perfectly normal.
NOTICE :
Proper inflation is critical to the performance of the boat. It is the pressure in
the tubes that gives your boat the necessary rigidity to perform well. Under-
inflation causes improper flexing of the tubes which will result in stress and
chafe
RISK OF OVERPRESSURE
EXAMPLE:
Your boat is inflated to the recommended pressure (240 mb/3,48 PSI) at the
beginning of the day (low ambient temperature =10°C/50°F). Later in the day, your boat is in direct
sunlight on the beach or on a yacht’s deck (temperature =50°C/122°F). Internal temperature of all
inflated compartments can then increase and reach up to 70°C/158°F (especially for dark-coloured
tubes). The consequence will be a doubling of previous pressure (480 mb/6,8 PSI).
YOU WILL THEN
HAVE TO DEFLATE
until you reach the recommended pressure.
CAUTION
WHEN YOUR BOAT IS OVER INFLATED, PRESSURE BECOMES TOO
STRONG FOR THE INFLATABLE STRUCTURE, AND COULD CAUSE A
BREAK IN THE FABRIC ASSEMBLY
IN CASE OF OVERPRESSURE
STANDARD VALVE (A):
Free some air by pushing on the
diaphragm (1) with a blunt object.
Beware not to fold down the
diaphragm.
SEMI-RECESSED OR “EASY
PUSH” VALVE (B):
Deflate by pressing the spring
loaded button
.
A
1
B
Summary of Contents for CADET 240 AERO
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