Grand Silver Line S250, Owner'S Manual

Page: 40 / 83

OPERATING THE CRAFT
40
Fig. 13. Tube inflation sequence.
The nominal pressure is 0,15 bar (2,15 psi).
Check the pressure in each chamber with a pressure gauge. If you do not have a pressure gauge
the following procedure will serve as a guide. Press a finger firmly against the tube – if the tube is
depressed by about 10 mm (⅜ inch) this indicates that the pressure is approximately correct.
After the tube chambers have been inflated to the nominal pressure replace the valve caps (valve
options 1 and 2). Fit the caps to the valve body and turn clockwise until secure. Valve caps protect
the valves from accidental opening, provide a secondary seal and protect the valves from
contamination.
The valves require little maintenance. Keep them clean using a standard household cleaner.