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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Restored vacuum pump
Hi all,
Just thought I'd post a couple of pictures of the vacuum pump I was talking about last month. It's a little Edwards ED 35 two stage pump which I found in a local laboratory's skip (dumpster) last year and have spent a bit of time restoring. I had the motor rewound, repainted it, stripped and cleaned the pump and fitted new springs and seals, and mounted it on some anti-vibration feet. Now it works very sweetly and holds its vacuum for more that a week after I switch it off. I'm planning to use it for some experiments on electrical discharges in low pressure gases. I'm meaning to create a web page with some pictures of the restoration, but so far I haven't got round to it, so I thought I'd share a couple of pictures. Pump as found: http://www.mythic-beasts.com/~cdt22/vp_as_found.jpg Pump restored: http://www.mythic-beasts.com/~cdt22/vp_restored.jpg Enjoy, Chris |
#2
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On Sun, 18 Sep 2005 03:53:57 +0000 (UTC), Christopher Tidy
wrote: Hi all, Just thought I'd post a couple of pictures of the vacuum pump I was talking about last month. It's a little Edwards ED 35 two stage pump which I found in a local laboratory's skip (dumpster) last year and have spent a bit of time restoring. I had the motor rewound, repainted it, stripped and cleaned the pump and fitted new springs and seals, and mounted it on some anti-vibration feet. Now it works very sweetly and holds its vacuum for more that a week after I switch it off. I'm planning to use it for some experiments on electrical discharges in low pressure gases. I'm meaning to create a web page with some pictures of the restoration, but so far I haven't got round to it, so I thought I'd share a couple of pictures. Pump as found: http://www.mythic-beasts.com/~cdt22/vp_as_found.jpg Pump restored: http://www.mythic-beasts.com/~cdt22/vp_restored.jpg Enjoy, Chris Chris, what vacuum can this pump pull? |
#3
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Don Foreman wrote:
On Sun, 18 Sep 2005 03:53:57 +0000 (UTC), Christopher Tidy wrote: Hi all, Just thought I'd post a couple of pictures of the vacuum pump I was talking about last month. It's a little Edwards ED 35 two stage pump which I found in a local laboratory's skip (dumpster) last year and have spent a bit of time restoring. I had the motor rewound, repainted it, stripped and cleaned the pump and fitted new springs and seals, and mounted it on some anti-vibration feet. Now it works very sweetly and holds its vacuum for more that a week after I switch it off. I'm planning to use it for some experiments on electrical discharges in low pressure gases. I'm meaning to create a web page with some pictures of the restoration, but so far I haven't got round to it, so I thought I'd share a couple of pictures. Pump as found: http://www.mythic-beasts.com/~cdt22/vp_as_found.jpg Pump restored: http://www.mythic-beasts.com/~cdt22/vp_restored.jpg Enjoy, Chris Chris, what vacuum can this pump pull? I think the official manufacturer's figure is of the order of 0.0001 torr if everything is working perfectly. But I haven't measured the ultimate vacuum as I don't have a working vacuum gauge. I do have some ancient Penning gauges and a controller I might try fixing sometime, though. Chris |
#4
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"Christopher Tidy" wrote in message ... Don Foreman wrote: On Sun, 18 Sep 2005 03:53:57 +0000 (UTC), Christopher Tidy wrote: Hi all, Just thought I'd post a couple of pictures of the vacuum pump I was talking about last month. It's a little Edwards ED 35 two stage pump which I found in a local laboratory's skip (dumpster) last year and have spent a bit of time restoring. I had the motor rewound, repainted it, stripped and cleaned the pump and fitted new springs and seals, and mounted it on some anti-vibration feet. Now it works very sweetly and holds its vacuum for more that a week after I switch it off. I'm planning to use it for some experiments on electrical discharges in low pressure gases. I'm meaning to create a web page with some pictures of the restoration, but so far I haven't got round to it, so I thought I'd share a couple of pictures. Pump as found: http://www.mythic-beasts.com/~cdt22/vp_as_found.jpg Pump restored: http://www.mythic-beasts.com/~cdt22/vp_restored.jpg Enjoy, Chris Chris, what vacuum can this pump pull? I think the official manufacturer's figure is of the order of 0.0001 torr if everything is working perfectly. But I haven't measured the ultimate vacuum as I don't have a working vacuum gauge. I do have some ancient Penning gauges and a controller I might try fixing sometime, though. Chris Try www.belljar.net for some neat vacuum experiments and information, Chris. Garrett Fulton |
#5
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Try www.belljar.net for some neat vacuum experiments and information, Chris.
Garrett Fulton Nice site. Thanks! Chris |
#6
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On Sun, 18 Sep 2005 19:38:54 +0000 (UTC), Christopher Tidy
wrote: Chris, what vacuum can this pump pull? I think the official manufacturer's figure is of the order of 0.0001 torr if everything is working perfectly. But I haven't measured the ultimate vacuum as I don't have a working vacuum gauge. I do have some ancient Penning gauges and a controller I might try fixing sometime, though. Chris 1 micron? Nice! |
#7
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When time permits, I would love to see those pages covering the
restoration. Great job!! I love it when an useful piece of equipment is saved from the jaws of the landfill. TMT |
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