The Shop > Tools
Compressor safety, or how do I make sure an old compressor is safe?
Kjelle:
That is a quite good compressor, sold by LUNA, a Swedish company... I doubt it's as old as your neighbour says, I'd say maybe 20 years.... LUNA is still in business, do a google, and you'll find them. I think they might stock whatever parts you need, and there might even be a spare parts list and sketch on their website...
It was touted as better than the Chicom stuff other were selling at the time it was new, I think they were made (partly) in Italy... Don't quote me on that!
Kjelle
S. Heslop:
--- Quote from: vtsteam on May 14, 2015, 01:37:49 PM ---I think inspection on practically any tank through a borescope (and I have one) won't tell much except to show that yes, in most tanks unless right off the showroom floor, there will be some rust. But how much, how bad? You can't really tell that by sight.
If it was mine, I'd fill the tank with water and hydrotest it to about double what I'd want to run it at, and hold it for a minimum of 5 minutes checking the gauge. If it's filled with water, it can't explode, just leak.
If you look elsewhere on this forum you'll find a boiler feed and hydrotesting pump I made from scratch. You just need that and a decent liquid filled pressure gauge in the range you want to check (maybe $10 on ebay).
One of the handiest things I've made here, and definitely something that can provide peace of mind.
--- End quote ---
Found the thread where you made that pump.
http://madmodder.net/index.php/topic,9920.50.html
So I figure the way to do things would be to take the thing apart and plug all the holes, test it to about 200 or more psi, then reassemble it and keep an eye on the gauges as it fills to make sure the motor cuts off at the right points. Is it at all likely that the gauges will be out of calibration? I suppose I could test the relief valve too while hydrotesting it.
Also there's a few plates on the tank that say that it was made in 1982. In Swedish and Italian. It's Italian made it seems.
It seems my favourite image host has gone down. Hopefully not for good, but good image hosts never seem to last for too long. I guess they're only losing money unless they're pulling some bullshit like photobucket or imgur.
awemawson:
[quote author=S. Heslop
It seems my favourite image host has gone down. Hopefully not for good, but good image hosts never seem to last for too long. I guess they're only losing money unless they're pulling some bullshit like photobucket or imgur.
[/quote]
That's why I always upload pictures to the forum rather than use a third party. That way the images are always there so long as the forum survives. Nothing worse than reading an interesting old thread where the pictures have all gone :scratch:
appletree:
Most receivers only have small inspection openings, so even the official insurance inspector can only assess using his eyes and aids such as mirrors etc. At work we had air receivers little larger than yours the Inspector only had a 2 inch diameter hole to look through admitted they were heavily constructed but they never went away for pressure testing. Have you considered contacting the manufacturer for advice, or a pressure vessel tester for their opinion on the way forward for a receiver of this class.
appletree:
Just had another look at your pictures, I think the vessel is better quality than suspected, the wall thickness of the inspection plug boss is of a good section and I would say the hole large enough to inspect through, after all that is what it is there for rather than a small pipe connection.
Any rust is likely to be at the lowest point a dentists type mirror would allow you to see, even if condensate has rested in the bottom it still needs oxygen for rusting to occur.
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