Pressure testing for buffer tanks

[woody]

Pressure testing for buffer tanks

I agree with Tony ......use an in test bottle.

Theres a plethora of sizes / capacities to chose from.

[m2xt]

Pressure testing for buffer tanks

Alan, It all depends on any mods made that may affect the integrity and thus original certification / BS. Buffers are just part of it, its the home made valve assemblies + rams that are also of interest.

Eddy, I know what you are getting for Xmas - its all sorted. (If I knew how to do them smilie face things, I would have done one there)

[big_nipper]

Pressure testing for buffer tanks

Paul, Dont know all of them but is : + ) together and is : + O

[robotwars]

Pressure testing for buffer tanks

oh dear, dont tell paul that .. hell think christmas has come early !!!

Oh btw question for paul.....

i would imagine there will be a high majority of people opening up their xmas pressies and finding robot bits....

what does mrs cooper by the man who has every robot bit he wants on the shelf???

jonno

[m2xt]

Pressure testing for buffer tanks

A milling machine and I have already opened it early

[woody]

Pressure testing for buffer tanks

Paul ... I didnt suggest modifying the bottle .... other than the removal of the valve.

A suitable fitting in a standard fire extinguisher cylinder will easily supply enough flow for 2 Bukert Valves.

http://www.luxfercylinders.com/products/http://www.luxfercylinders.com/products/
For a look at specs / types.

[tunna]

Pressure testing for buffer tanks

Paul you lucky sod

[killercarrot]

Pressure testing for buffer tanks

Right, decision time. I can either rebuild using a 100x125 16bar norgren ram, which I already have, and buy a couple of 20 bar 2/2s and a bigger regulator lets say £250... or I can use the 135x50 I have and buy some HP 2/2s a small reg for the down stroke and a 3/2 for about the same cash.... watching a variety of low and HP machines on saturday, Im not so sure as to the route to take, I dont want to build a completely mental gravity like thing, but would appreciate a bit more power. running the calcs through Noels spreadsheets things come out pretty even.... I hereby start the Low pressure high pressure debate.

[tunna]

Pressure testing for buffer tanks

Nothing exceeds like excess!!!If you cant stand the Pressure well you know the rest!!!

[m2xt]

Pressure testing for buffer tanks

Following a brief review of the PED with Daniel and Adam from Team Mute, the current thinking is as follows for pressurised vessels in 1000 psi / 69 bar max robot applications:

1) A vessel with a volume equal to or less than 1 litre must be designed and manufactured in accordance with the sound manufacturing practice of the EU country of origin and be marked with the manufacturer.

Vessels with a capacity greater than 1 litre are treated in one of two ways:

2) If the volume (in litres) multiplied by the pressure (in Bars) is less than or equal to 50 Bar litres, then paragraph 1) above applies. For example: max woring pressure 16 bar, max volume 3.125 litres.

If the Bar Litres is greater than 50 but less than 200, the vessel requires a CE mark to Cat 1.
The prototype ruling may be a way around this CE Cat 1 requirement. I do not consider myself qualified to advise on this one but reading the text suggests that if you have to purchase the vessel from a manufacturer, then it should meet the PED requirements.

Regardless of any of the above, pressure testing / certification apply.

I would welcome any comments on this text.

Paul

[m2xt]

Pressure testing for buffer tanks

Rob, assuming your HP ram is 50mm bore, I would stick to your 100mm bore LP gear, you have the potential to get a greater performance.

Ultimately HP will win on outright power but that does not guarantee a winning machine. You need to decide on what performance you require and that in turn will influence whether you go LP / HP. If you are happy with lots of 1m high flips then LP is fine, if you want 3m high flips then LP is struggling and you are best going HP.