• specifications
• Plan

 HAND MADE INNER TUBES  for  INFLATABLE  PRODUCTS  since 1989

UK  M.o.d,  Rolls Royce, Universities, Far East Navies, Volvo and many other well known Institutions.

5 year warranty

 Key

 Fig.1.Leave existing valves in situ.

 Fig.2.Cut a vertical 6" (150mm) slot from just above the deck, and a 45mm diameter hole along side

 the cut

Clean the inside of the outer tube with a vacuum cleaner, particles inside may damage the new inner tubes.

 Fig.3.Turn ends of Inner Tube inside out. Thereby reducing a 3 meter tube to 2 meters.

 Give the inner tube a dusting of french chalk,

 Fig.4.Insert the Inner Tube, first in one direction, put valve in hole, insert remaining Inner Tube.

 Fig.5.Ensure there are no Twists in the Inner tube.

 Fig.6.Insert Valve core and commence gentle inflation, the inside out tube will now extend to fill

 the chamber

 Fig.7.Tube is now fully inflated and NOTE THE CUT IN THE TUBE STAYS CLOSED

 Air Leakage                           Less than 1 % in 3 months

 Temperature Range              -25°C to +75°C

 Elongation to Break               200 %

 Tubes are GLUED with a superior marine standard product, in the proven traditional

 manner. Welding reduces the thickness of the material, resulting in a burst seam if the

 inner tube does not totally fill the tube cavity on initial inflation , (and in our experience,

 it never does)

 Gemini inner tubes just stretch to fill the tube 100%. The Inner Tubes are so flexible they

 can be folded hundreds of times without cracking or leaking.  We have been supplying inner

 tubes since  1988, to clients in Holland, Germany and the UK with 99.9% successful

 installation and operation. (nothing is ever 100%)

 Made from 1mm thick PVC with a lower air loss than standard tubes. Typically less than

 1% in 6 months.

 Below is our available sizes and respective retail prices

 Tubes available in any Length, Ø and Shape

Color	Length CM	Length inches	Art No	£	Weight Kg	Weight Lbs
	200	78.74	2002	93	2.8	6.174
	300	118.11	2003	106	4.5	9.925
	400	157.48	2004	136	5.2	11.465
	500	196.54	2005	165	6.5	14.332

 (Note we  sometimes have  Inner Tubes  which have been damaged

 during manufacture,  they will have a small patch  on them on them

 but cannot be sold as new, ask for prices.)

 For the bow section,2 Inner tubes, A and D, are required. 

 1 tube wrapped around the bow cannot fill the area  fully.