- Thread starter Fergus
- Start date
rtbcomp
Moderator
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- 18,549
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- Sheffield UK
Maybe something here
http://www.absolute-vacuum.com/oil_edwards20.php
or here
http://www.chemicals-technology.com/contractors/pumps/edwards-vacuum/
Or Google "Edwards Vacuum Pump" oil
http://www.absolute-vacuum.com/oil_edwards20.php
or here
http://www.chemicals-technology.com/contractors/pumps/edwards-vacuum/
Or Google "Edwards Vacuum Pump" oil
gordon stephenson
Member
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- Skelton in Cleveland U.K.
Hello Fergus,
Probably miles out, but When I O/H a few large vac pumps for I.C.I. on their titanium plant they used Rotella 27,and these things had to pull to within a gnats whisker of absolute,
Probably miles out, but When I O/H a few large vac pumps for I.C.I. on their titanium plant they used Rotella 27,and these things had to pull to within a gnats whisker of absolute,
Edwards currently offer a range of oils for rotary vacuum pumps, including Ultragrade, which is a range of modified mineral oils; TW which is a distilled mineral oil; Edwards 45, a synthetic hydrocarbon, and the the perfluoropolyether oils Fomblin and Crytox. They are all characterised by low vapour pressures, which help to achieve the best ultimate vacuum possible with these pumps under different working conditions. "ordinary" engine oils have higher vapour pressures and would degrade the ultimate vacuum obtained. Ultragrade or Edwards TW should be fine for most applications, but don't try silicone-based diffusion pump oil. It's lubricity is almost non-existent!
chunkolini
celebrity artiste
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- Swansea
perfluoropolyether oils Fomblin and Crytox.
I thought Fomblin and Crytox were extras in Star Trek.
Seriously, yet again the body of knowledge on this site is amazing.
One day somebody willl find a tech question that no one here can answer. Maybe.
Chunko'.
I thought Fomblin and Crytox were extras in Star Trek.
Seriously, yet again the body of knowledge on this site is amazing.
One day somebody willl find a tech question that no one here can answer. Maybe.
Chunko'.
Thank you!
Searching this pump on the internet makes me realise I've done pretty well here for £25.
Service Manager - Edwards
New Member
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- 1
1SC450B is a very old pump but most Edwards Hydrocarbon (sold as Ultragrade) oils will be ok to use. Best for this pump is Ultragrade 19.
More info and technical advice at www.edwardsvacuum.com
More info and technical advice at www.edwardsvacuum.com
Note You will need to flush the pump out to get rid of the crud from the pump so you will need flushing oil as well as the pump oil itself
There is a place in Aldermaston(AWE has a lot of vacuum pumps) that specialises in Vacuum pump oil near where I live and they are very friendly to deal with and had siginificantly lower prices than all the ones I rang up for quotes.
The company is
GBRtech
unit 6 jupiter house
Calleva Industrial park
Aldermaston
Reading RG7 8NN
01189 982 0567
http://www.gbrtech.co.uk/
minimum order £30
I have no association with them apart from being a very satisfied customer when purchasing oil for my Edwards, Leybold and Pfeiffer vacuum pumps.
Phone them for advice on the type of oils you need. (like i did)
IMHO for your pump you will need some Solvex 10 flushing oil
and some GBR110 pump oil.
There is a place in Aldermaston(AWE has a lot of vacuum pumps) that specialises in Vacuum pump oil near where I live and they are very friendly to deal with and had siginificantly lower prices than all the ones I rang up for quotes.
The company is
GBRtech
unit 6 jupiter house
Calleva Industrial park
Aldermaston
Reading RG7 8NN
01189 982 0567
http://www.gbrtech.co.uk/
minimum order £30
I have no association with them apart from being a very satisfied customer when purchasing oil for my Edwards, Leybold and Pfeiffer vacuum pumps.
Phone them for advice on the type of oils you need. (like i did)
IMHO for your pump you will need some Solvex 10 flushing oil
and some GBR110 pump oil.
Unless your operating at the limits of the pumps (which you won't be for composites) you'd get away with a more readily available mineral oil.
Shell Tellus 32 or 68 would do.
With vacuum pumps for composites the biggest problem is the volatile compounds that are drawn off from the resin - these condenses out inside the pump and cause problems with oil circulation, sticking vanes etc.
I'd be tempted to use a cheaper oil (like the Shell) and change it more often. i wouldn't bother with the flushing oil either just keep changing it.
Are you using it for vacuum bagging or resing degassing ?
Garreth.
Shell Tellus 32 or 68 would do.
With vacuum pumps for composites the biggest problem is the volatile compounds that are drawn off from the resin - these condenses out inside the pump and cause problems with oil circulation, sticking vanes etc.
I'd be tempted to use a cheaper oil (like the Shell) and change it more often. i wouldn't bother with the flushing oil either just keep changing it.
Are you using it for vacuum bagging or resing degassing ?
Garreth.
The other reason for not using Fomblin pump oils is the price ! The last stuff we bought was about £200 / kilo (ie just over a litre) and that is regenerated not new
You only need this for pumping oxygen or oxygen rich gases.Garreth
I'd use a cheap mineral oil then and change it frequently - we repair a lot of vacuum pumps used for composites and contaminated oil is what kills 'em !
Best to warm the pump up first by running it against a closed valve for 15 to 20 mins and purge it afterwards by running it (again 15 to 20 mins should do) with a valve cracked fractionally open to atmsophere so that a tiny amount of air passes through the pump to drive off moisture etc (this simulates the "gas ballast" valve found on some pumps).
If you're not got them its worth investing in a couple of breach (through bag) connectors - 1 to get the vacuum into the bag, and another 1 with a gauge to monitor the vacuum level inside the bag. Marineware in Southampton sell them.
Cheers !
Garreth
Best to warm the pump up first by running it against a closed valve for 15 to 20 mins and purge it afterwards by running it (again 15 to 20 mins should do) with a valve cracked fractionally open to atmsophere so that a tiny amount of air passes through the pump to drive off moisture etc (this simulates the "gas ballast" valve found on some pumps).
If you're not got them its worth investing in a couple of breach (through bag) connectors - 1 to get the vacuum into the bag, and another 1 with a gauge to monitor the vacuum level inside the bag. Marineware in Southampton sell them.
Cheers !
Garreth
db133
New Member
- Messages
- 4
Edwards ED 35 SPEEDIVAC Oil ?
Hi
I have obtained an Edwards ED 35 Speedivac Pump.
I can not find the operating instructions (only the workshop stripdowm)
Can any one help with information ?
I do feel an oil change is in order but how to do it and what oil to use ?
I would like to get the pump working but dont want to dammage it. I'm in Brighton Sussex.
In any event kind regards.
Hi
I have obtained an Edwards ED 35 Speedivac Pump.
I can not find the operating instructions (only the workshop stripdowm)
Can any one help with information ?
I do feel an oil change is in order but how to do it and what oil to use ?
I would like to get the pump working but dont want to dammage it. I'm in Brighton Sussex.
In any event kind regards.
