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Old 14 May 2009, 08:21   #1
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Pressure release valves.

can you get something that fits into existing valves that will release the pressure?
ie a new valve core ,or do the existing valves have to be replaced..?
ta..flooky
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Old 14 May 2009, 13:03   #2
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Existing doesn't get replaced; new PR valves are added in addition.

jky
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Old 01 June 2009, 08:48   #3
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cheers ...
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Old 01 June 2009, 21:07   #4
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I invented just such a thing to fit onto an existing valve, sent the idea to Leafield and heard absolutely eff all in response.
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Old 02 June 2009, 07:52   #5
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Quote:
Originally Posted by BogMonster View Post
I invented just such a thing to fit onto an existing valve, sent the idea to Leafield and heard absolutely eff all in response.
Ah, but come on Stephen.
It's not possible for everyone to have a highly trained Penguin with a stick stationed on ther boat all the time, and the fish bill would be a bit steep too.

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Old 02 June 2009, 20:49   #6
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That was the first design but the bugger kept pecking holes in the tubes and I had enough bloody leaks already!

Version two was a pressure relief valve built into a replacement cap, the idea being that you screw on the airtight cap which presses in the valve, and there is a blowoff valve built into the cap which operates above whatever pressure you wanted. It was more of a concept than a detailed design though I did a drawing based on a technical drawing of an existing Leafield valve, but it should have been perfectly possible to make.

I suppose they wouldn't want to sell just one product for each chamber when all the mugs that want them currently buy two separate ones ... my idea is the Wash n Go 2 in 1 of rib tubes, why take 2 bottles into the shower
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Old 02 June 2009, 22:18   #7
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Octopus idea

I had this idea of rigging up an octopus sort of device with tubes running to each value and all connected up to a single pressure release valve. The concept was to rig this up when leaving the boat in dry storage. I tried to see if bits were available from Halkey-Roberts and got a stiff reply that they wouldn't give any advice on any modifications to their product. The automatic tube pressure inflation devices must have something similar, at a squillion times the price, so it must be feasible.

In the end it was easier just to let the pressure out for storage - and get release values in the new boat!
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Old 03 June 2009, 02:33   #8
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I haven't seen one but I would imagine a normal relief for a RIB works the same as any other, ie a diaphragm with a spring behind it, nout complex.
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Old 03 June 2009, 02:37   #9
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It's the cutting 5 holes in the tubes that's the off putting bit - and the labour cost if its not done when the tubes are made!
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Old 03 June 2009, 02:48   #10
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Yeah cos I think they have a backing to them (well mine seem to) so I suppose they have to be fitted when the tubes are made, unless you can push the back through the hole, and glue it, and the front piece screws on to it to compress it together
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