Air Receiver

Discussion in 'Parts/Engines Wanted' started by goodchip, Mar 6, 2008.

  1. goodchip

    goodchip Member

    Anyone know of any starting tanks.I need one for a twin Petter Atomic.Thanks John.
  2. boblester

    boblester Member

    Old oxygen or CO2 bottles can be converted , just out of interest is the atomic the one which was on ebay ?

  3. goodchip

    goodchip Member

    Bob,thanks for the advice.I thought about oxy bottles,have to look on ebay! The engine is not the one on ebay but I think was a sister engine.I did not get it from the dealer chap.What has happened to him by the way? It is a TX2 72hp twin in lovely original condition, alas minus the bottle. PM me if you are ever in the west. John
  4. boblester

    boblester Member

    If you ever show it be sure to let me know , we collected its much smaller sister a week or so ago a 5hp atomic pumping set needs a bit of TLC but will make a nice show piece I hope.

  5. TangyeDan

    TangyeDan Active Member

    Hi John,
    There was discussion about using oxygen bottles some time ago on here: a proper tank would be better, and it is definitely worth getting the whole setup tested.


  6. goodchip

    goodchip Member

    Thanks Dan,the annoying part about all this is I let a Petter starting bottle go the other day! Thanks fot the link to the oxy bottle thread,very interesting.The old V series semi Diesel Petters used the bottle upside down to over come the drainage problem,I will try that if i find an oxy bottle.Open the drain first before starting though! As regards testing,I just fill em up with water and pump em up! My mate just starts up the compressor and stands well back......crazy B blew the top of his shed off the other day! John
  7. TangyeDan

    TangyeDan Active Member

    The inverted principle is a good solution, all it needs is a tee on the outlet with a tap at the bottom and it's sorted - I use an oxy bottle for starting my Tangye AWH4, I will install the bottle inverted in the shed when I get round to setting it up!

  8. peters1956

    peters1956 New Member

    I have quite a few bottles, both steel and aluminium alloy, from CO2 fire extinguishers. If anyone is interested, I could drop a selection off at IF one day, or mail me, peter at I think I can get as many as I want, FOC. Some of them even have horns and CO2....

    All the best

  9. goodchip

    goodchip Member

    Not big enough for what I want.Looking for something the size of a large oxy bottle or bigger. Thanks John
  10. paxmanmerv

    paxmanmerv New Member

    I am using gas taks from car gas systems. test pressures are high & will probably be ok for the use you will be giving them. Should you go down this route, ensure that you remove the valves from the feed pipe or you wont get sufficient flow of air. :wink:
  11. rob1808

    rob1808 New Member

    My views regarding air receivers bodged up from various unsuitable vessels have already been aired on a previous discussion on this site. I am assuming the pressure required to be 300 - 350 psi which is usual for air start systems.
    Just to reiterate, and I do speak as a retired boiler/pressure vessel inspector, please do not listen to those who advocate the use of propane tanks which are totally unsuitable. Propane has a vapour pressure of about 90 -100 psi and the tanks are constructed accordingly and certainly not as air receivers which require a pressure gauge, a safety valve and a drain or for use at pressures in excess of 100 psi.
    Test pressures (usually 1.5 x design pressure)are not working pressures!
    Modifying oxygen/CO2 bottles requires some careful consideration as any modification such as cutting holes or cutting tops off and rewelding bits on etc seriously affects the vessels integrity.
    Any modifications to a pressure vessel is subject to design appraisal and should only be carried by suitably qualified personnel using approved techniques and materials.
    If you are a user of compressed air systems I would draw your attention to the Pressure Systems Safety Regs. particularly if the public/third parties are involved.
    I apologise for going a bit but I have seen some pretty awful things in my time and some people do not appreciate the dangers involved in DIY pressure vessel contruction.
    In short, do not bodge it, get a proper air receiver for the job.
  12. admin

    admin New Member

    I'll once again second Bob on this. There is no substitute, use a bottle designed for the job.

    Get a qualified local inspector to check the bottle before use. If you have not seen the carnage caused by a large pressure vessel letting go then I guarantee you cannot imagine it!

    All our bottles are tested on a regular basis (every 24 months) by a qualified boiler inspector using visual inspection and ultrasonic thickness testing after having initially being hydraulic tested on arrival.

  13. paxmanmerv

    paxmanmerv New Member

    Just another thought, how about a compressed air cylinder the same size as a large oxy cyl, filled & supplied by a reputable company such as air prods, energas, BOC just to name a few. use the air then exchange them for full ones.
    The tanks on my engine are vehicle LPG tanks & are tested annualy by the same man who tests the boiler on our fowler steamer. The annual tests i personaly feel are a good idea to ensure that no moisture damage has occured over the few days opperation during the season. As you are all well aware, this testing regime is in excess of the normal times recomended by insurance companies & our dear friends at HSE. The tanks are stamped at 35bar & tested well in excess of that figure. In addition to that, each of the 3 tanks all have drain taps & a saftey valve set at 300psi so there is little chance of all 3 failing at once. In addition to all this, the air tanks are enclosed in a steel cabinet to limit the possibility of shrapnel due to a catastrophic failure. I run the start system on the Paxman at 250 - 270 psi through 22mm copper tube which Yorkshire tube assure me is tested to 50bar. The soldered joints in the system are of the end feed type, again recomended by Yorkshire tubes for maximum strength.
    Please note that these are my personal views & proceedures & are for the conveyance of ideas to those who may also wish to keep their exhibits with air start as original as possible (not to fit a codged up electric starter motor). I would welcome any more thoughts from those who are no doubt more knowledgable than myself as to how to make my exhibit safer.

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