Pneumatic questions, sorry!

[maddox10]

Re: Pneumatic questions, sorry!

Where can I get an on/off valve go on a paintball bottle

In my previous post I gave a link to another tread, and that gives you 2 possibilities.
I buy mine at the local paintball store. (1.2km from my front door)
Otherwise, don't you have google in your favorites. Or can't you use the yellow pages and paintball shop in 1 sentance?

and what are the dimensions of the 20oz co2 bottle?

330mm long, 75mm diameter.

[maddox10]

Re: Pneumatic questions, sorry!

Do people build their own buffer tanks for LP flippers?

Yes, in a lot of cases it's an adapted 1 kg powder extinguisher from the car scrapyard.

You would really want flow in at one end and flow out at the other but paintball tanks flow in/out is at the same end

Yes, the tread of the size in the bottleneck of a normal paintball bottle (in a fire extinguisher it's even bigger, M25*2 or 4/3 NPT) allows you a let trough of over 126mm², and that is the max you get from a Burkert 5404, so not much to worry about.

[Max]

Re: Pneumatic questions, sorry!

How are those bottles adapted and can you use those bottles for a fp buffertank?

[maddox10]

Re: Pneumatic questions, sorry!

How are those bottles adapted

.
By adding in/outlets in the right kind of connectors.

and can you use those bottles for a fp buffertank?

No, testpressure 16 bar, workpressure max 5 bar.

If you would try, the plastic handle/trigger will pop off. If you replace that with something stronger, the bottom will pop out. If you weld that up, you'll have a grenade.

And, in the modern feathers, a car powder extinguisher would be a tad big

[Max]

Re: Pneumatic questions, sorry!

what should i use to make a buffertank? for my main tank would it be possible to get a painball bottle, cut 10cm out of the middle of it then weld the two bits together like this:
[attachment=0:3gcwa20h]painball bottle modification.png[/attachment:3gcwa20h]
also where can i get a dump valve? i have tried googling it but cant find any it comes up with something for cars
thanks.

[psychostorm]

Re: Pneumatic questions, sorry!

where can i get a dump valve? i have tried googling it but cant find any it comes up with something for cars
thanks.

It's nothing special - a ball valve will do.

[woody]

Re: Pneumatic questions, sorry!

It's nothing special - a ball valve will do.

OF THE CORRECT PRESSURE RATING.

[woody]

Re: Pneumatic questions, sorry!

Max... your questions show a lack of understanding / competence...don't even try to make your own F.P. Buffer Tank... in fact I'd recommend steering clear of F.P.

There are however various paintball bottle sizes ... if you want a shorter bottle.. try a 3.5 oz as a buffer.

[maddox10]

Re: Pneumatic questions, sorry!

Cut a tank in half and reweld it, if you can weld ali as a professional , you could do it.
But to get it recertified, that will be another matter.

On dump valve, any manualy operated 2/2 valve of the correct pressure rating will do the job nicely. I even used adapted fire extinguiser valves for that job.
But simplest is a hydraulic 1/8 bsp ballvalve.

The dump vales you found for cars are more like the mandatory PRV we need. Pressure Relief Valves. In cars it's used to protect the turbo and inlet manifold from overpressure.
In the robots it's to have a safety feature in the pressurised parts. The PRV has to be set at the max working pressure of the lowest rated component, or at 1000psi, whatever is lowest.

[Max]

Re: Pneumatic questions, sorry!

sorry for my lack of understanding/competance,
i had tried to find smaller painball bottles but all the shops i looked at only stocked 20oz ones but cleary others are available.
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?

[woody]

Re: Pneumatic questions, sorry!

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]

Re: Pneumatic questions, sorry!

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]

Re: Pneumatic questions, sorry!

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]

Re: Pneumatic questions, sorry!

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

[maddox10]

Re: Pneumatic questions, sorry!

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.