Buffer tanks...

[Laser]

Hi,

We are currently in need in a lighter buffer tank, at the moment we are using a 20oz co2 bottle with a modified pin valve (thanks Will for telling us how to do it) and I was wondering what else we could use.

I saw that the big nipper team were using modified camping bottle that they got pressurised, so that may be an option, but personally I would like a bigger Buffer tank. So I was thinking of a foam fire extinguisher.

Does anyone know what the imput thread is on the bottle?

[jonny]

Re: Buffer tanks...

1. go down to your local scrap yard
2. pick up a large quantity of old foam fire extinguishers for about a quid each, avoid rusty ones
3. atleast one of them should have a thread close enough to a standard bsp thread for it to work, jam a fitting in and araldite in place

tips: bring a 1/2 bsp fitting with you and compare the od of where the valve enters the cylinder to the 1/2. this will give you a good idea if the extinguisher will be suitable. also avoid the really cheap disposable ones (easy to spot, they have plastic valves) as there is no screw part in them.

[Laser]

Re: Buffer tanks...

that may work

do you know what the dimensions are for them?

[jonny]

Re: Buffer tanks...

they vary tremendously

[Laser]

Re: Buffer tanks...

ohh right I've only got 11om of height to play with...

[jonny]

Re: Buffer tanks...

shouldn't be hard to find one the right size though

[Max]

Re: Buffer tanks...

Do you mean it must be 11cm diameter

[Laser]

Re: Buffer tanks...

well the height of my robot is 110mm and i have to fit a solenoid valve and a esc underneath it

[Max]

Re: Buffer tanks...

How long do you want it?

[maddox10]

Re: Buffer tanks...

Worst case scenario. I could create one perfect fitting from Ti tube and end plates.

[Laser]

Re: Buffer tanks...

Worst case scenario. I could create one perfect fitting from Ti tube and end plates.

That may be a tad too expensive

How long do you want it?

about 250mm but around 0.5l volume

[Max]

Re: Buffer tanks...

I've got one here, about 0.85l volume, 230mm long in total (19cm without fitting) 70mm diameter. Working pressure 14bar with a 1/2 thread
Pm me if interested

[maddox10]

Re: Buffer tanks...

That may be a tad too expensive

You never know, a search on Ebay could yield you the right basic stuff.
Welding it up ain't that hard.

[Laser]

Re: Buffer tanks...

Ill have a look at the scrapyard and see what they have, if not Maddox your option would be ideal