Select to expand quote
lostatsea said..
I have had a fair few kites from many of the different brands over the years, a lot of the major brands have suffered at one point or another, 2007 north, 2010 best, 2011 ocean rodeo are just a few that come to mind but end of the day, the majority of issues are valve related and only happen after a season or 2 of POOR storage ie hot cars and sheds
You nailed it, "Poor stoorage" !! BUT in saying that you are also correct in saying that certain brands have had valve delamination issues, and the whole replacement valve industry was created by this poor quality weld/glue methods used by those kite brands. This is where I wish I had my ordinary kiter log in, so that I can comment as a kiter that has seen it all from the beginning.
I can say that there has been one brand that has had almost no issues over the last 12 years, and that's Cabrinha. I've seen a few valves come off but way far less than any other brand. There are some that come to mind that if they come in for repair for a leaky valve, most reputable repairers will not repair them unless all valves are done at the same time, because once 1 has come off, they will all come off.
Things I've learned about the bladder and valve issue is that some brands persisted with using PVC valves, theses are the ones that look like the same valves that come on kids inflatable pool toys, they are clear and have a push in valve cap. PVC does not stick directly to polyurethane, which is what the bladders are all made from. So the technique was to use a "disc" of glue that would stick to PVC and urethane, and basically just melt it and let it set to make the bond. Problem is that in the back of your car in a hot and humid bag, the glue would soften and come loose.
Some brands got onto the "secret" sooner than others, like Cabrinha, they always had their own molded valves, which were molded from polyurethane, and which would stick better to the bladder material using high frequency welding machines.
I've visited two kite factories now (Ozone, and Performance/Cabrinha), neither of them let us get close to the welding machines but both of these brands have very reliable valves.
There are still brands being made right now, that are using those crappy kiddy pool toy valves, and they will delaminate.
Number 1 thing you can do as a kiter to look after your kite though is not keep it in the back of your car. I know thats hard to near impossible for some people, but thats the truth, Second thing is not to store the kite when it is wet, especially in its bag and all rolled or scrunched up.
If you get your kite wet, and we will all do that sometimes, then do whatever you have to do to get home or to a beer o'clock facility, but then get your kite out and let it dry thoroughly before storing it again.
If its going to be a stinking hot day, store your kites outside of the car, or at least leave the windows down a bit and let the super hot air out of the car. The heat in a car will damage twin tips and surfboards no matter if they are made from epoxy or poly resin.