Featherweight FP Part Sourcing

[AndrewHibberd]

I am looking at making a FP flipper system to make a bigger version of Anticide I just have a few questions as to where to source parts.

1) I am going to use a burkert valve, is RS the best place to get them from? Or has anyone got any other suggestions for a FP valve?
2) RS sell various hydraulic fittings, are these the best type to use?
3) Does anyone have a good supplier for a small (ball) dump valve rated at 1000psi
4) Where can I find a 1000psi pressure release valve - my co2 tank has a standard burst disc, do I need to add another burst disc to my buffer tank or is a pressure release valve suitable?
5) I am looking at using copper tube for copper tube for piping to the valve with compression fittings, do the olives leak when they get cold?
6) I have a valve as below, looks like 1/4 fittings is this standard for the paintball flexiable lines?



Thanks in advance

[maddox10]

I am looking at making a FP flipper system to make a bigger version of Anticide I just have a few questions as to where to source parts.

1) I am going to use a burkert valve, is RS the best place to get them from? Or has anyone got any other suggestions for a FP valve?

The only viable alternative I have seen p to date is a Tjech made valve , brand Alpha. Ad it seems RS is the easiest place to buy.
I never got an in with B¼rkert Belgium, what didn't want to sell any valves to non firms.

2) RS sell various hydraulic fittings, are these the best type to use?

Depends on kind of fitting, and what treads you prefer.

3) Does anyone have a good supplier for a small (ball) dump valve rated at 1000psi

4) Where can I find a 1000psi pressure release valve - my co2 tank has a standard burst disc, do I need to add another burst disc to my buffer tank or is a pressure release valve suitable?

The burst disk on a paintball bottle is rated at 135 or 195 bar. You need a PRD- pressure release device set at 1000 psi/70 bar.
Look here for a PRD

5) I am looking at using copper tube for copper tube for piping to the valve with compression fittings, do the olives leak when they get cold?

Normal plumbing copper line isn't strong enough. These pipes are burst pressure 30 bar for the 8mm version.

6) I have a valve as below, looks like 1/4 fittings is this standard for the paintball flexible lines?

1/8 NPT outlet, 1/2 NPT 14 TPI for bottlemounting. And yes, you can use standard paintball flexible lines. But I'm not that impressed about those.
I retapped the outlet with 1/8 bsp, and used a standard hydraulic coupling with steel pipe connection.

[woody]

I have a valve as below, looks like 1/4

BSP / NPT Pipe thread sizes are strange to the unintiated... they have NOTHING to do with the outside diameter...rather the size applies to the nominal pipe bore.

1/4 BSP / NPT would be ...1/4ish bore and 1/2 O.D.!

Also BSP and NPT are very similar but the Americans deliberately made their threads slightly different....

http://www.teamonslaught.fsnet.co.uk/threads.htm

[maddox10]

From the top of my head.
1/8 bsp requires a 8.8 drill, and has an external diameter of 9.8mm
1/4 bsp 11.8mm drill, and has an external diameter of 13.2mm
3/8 bsp 15mm drill, outer diameter 16.6mm
1/2 bsp 19mm drill, outer diameter 21.2mm
3/4 bsp 24.5mm drill, outer diameter 26.7 mm

NPT is more difficult, as it is a tapered tread, that is why I don't use it if I can avoid it.

[AndrewHibberd]

I have started buying some parts, but have a couple more questions. I was planning to use a burkert valve to fire the ram, however I have been reading up about QEVs for inputs. The only ones I have seen ready available are rated at 10-16bar. Has anyone seen a supplier of 1000psi QEVs?

[PJ-27]

Where is this Wiki!!!!

We really need concise info on Pneumatic systems.

[woody]

We really need concise info on Pneumatic systems.

Search the web.


Nice and simple guide.
http://www.teamdavinci.com/understanding_pneumatics.htm

My own attempt at a simplified guide.
http://www.teamonslaught.fsnet.co.uk/pneumatics.htm

There is a maximum extension speed that your cylinder can reach for a given leverage ratio and mass to be thrown..... based on Acceleration = Force / Mass and Velocity = Sqrt (2 * Acceleration * Distance travelled ).

You should then calculate the flow needed..for filling you cylinder quickly enough... from the maximum extension speed.

http://www.hassockshog.co.uk/flipper_calculator.htm

[maddox10]

I have started buying some parts, but have a couple more questions. I was planning to use a burkert valve to fire the ram, however I have been reading up about QEVs for inputs. The only ones I have seen ready available are rated at 10-16bar. Has anyone seen a supplier of 1000psi QEVs?

1000psi QEV's. Nope, no reason for industrial applications. I did build one in the foot of an experimental buffertank-ram, but it was a partial failure.
The stuff worked, but had no advantage over the conventional setups.

I guess it's possible to rebuild a 16 bar QEV to 70 bar application. But why?