Pneumatic questions, sorry!

[woody]

i dont know if i will need a remote isolation valve if i use a standard paintball bottle?

If your paintball tank has an on/off valve.. as shown in my 3.5 oz pic.. then that will be your isolation valve ...
There's another sort of valve called a pin valve... this valve is normally opened and shut by screwing the whole bottle in or out ... not acceptable... this will need a seperate isolation valve.

You can see the pin in the centre that is depressed to release the gas.



This would need an adaptor like this to push the pin and turn the bottle on/off...

[maddox10]

sorry for my lack of understanding/competance,

Just catch up.

I had tried to find smaller painball bottles but all the shops I looked at only stocked 20oz ones but cleary others are available.

Smallest is 3.5oz (135 grams, volume 180cc), biggest I have seen, and could be called paintball tank was 24 oz (760 grams, 1 liter of volume)

I have been looking at the rules and think I understand what the rules require in a pneumatics system, I see that I will need my presure relief valve, my dump valve but I dont know if I will need a remote isolation valve if I use a standard paintball bottle?

I repeat. Paintball bottles can come standard with an on/off valve, not a pin valve. It's just what you buy.

With a pin valve you need an isolation valve, with an on/off, you don't.

[Max]

i have started finalizing some of the components for my pneumatic system and it looks like this:
[attachment=0:3q10759u]pneumatic system picture.jpg[/attachment:3q10759u]
i am not sure if the pressure relief valve and the dump valve is in the right place, apart from that does the rest of it look fine?

[woody]

The dump and pressure relief don't go inline.
[attachment=0:30rxwtkz]pneumatic%20system%20picture.jpg[/attachment:30rxwtkz]

[maddox10]

The ram you propose is not bad in size, develops 980 kg of force at room temperature.

But I think you'll like a slightly larger buffertank. The ram is 100 cc big, the buffer only 180 cc.

[Max]

thanks for the reply (must have been hard to make the picture) i understand now.
i have made some simple cad drawings showing the positions of the major components and shape of the robot:
[attachment=2:2br8z8wz]flipper from side.jpg[/attachment:2br8z8wz]
[attachment=1:2br8z8wz]flipper with labels.jpg[/attachment:2br8z8wz]
[attachment=0:2br8z8wz]flipper from top.jpg[/attachment:2br8z8wz]
as you can see it should be very compact which is why i have been enquiring about custom made tanks(hard to find standard ones that will fit yet still hold enough gas) also it is not very high and invertable, thats why i can't have a very long ram. i know it doesn't need to be invertable because i can right it with the flipper and i can't use the flipper upside down but i would like to be able to move to the centre of the arena before righting my self to stop me flipping myself out of the arena! and also it won't matter if i get flipped but run out of gas.

also, i will try and find a larger buffertank but it is hard to find one that fits in the space i dedicated to it in my design but i think there is enough room if i can find a good fitting tank

[woody]

I'd double check with Mario on the minimum TOTAL bottle length with on/off valve and adaptor/pipe work.

Number 1 is a 50 ci HPA tank, and number 5 is a 20 oz CO2 tank

http://www.catalinacylinders.com/paintball.html

4 oz

[Max]

hi,
what is a quick exaust valve and will i need one? also i've read that some antweights use deodrant cans for main tanks but how much pressure can they take, i cant beleive that something that thin can take liquid co2 but i thought it was worth checking.

[woody]

A QEV exhausts the gas from the cylinder quicker...you don't need one on your F.P. design.

Deodorant cans!!!..NO NO NO

Don't faff around with making a F.P. buffer ...use an existing liquid co2 bottle with the appropriate neck fittings or BUY one from a reputable builder / source.

[Max]

ok, i'll buy one or get one made by someone like kenny, i was just finding it hard to find a bottle which fits in the design and holds enough co2. what size are the ports on a burkert 5404 valve (can't open the pdf doc. with specs on it) and what size pipe can i use with it without an adapter?