Author Topic: Vacuum Pump for VAC-SYS  (Read 15924 times)

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Offline live4ever

  • Posts: 771
Re: Vacuum Pump for VAC-SYS
« Reply #60 on: August 12, 2017, 05:44 PM »
Bumping this up as I'm looking to pair either an Excel 1 or 5 with the clamping module.  @Kriss - any update on how the smaller and quieter Excel 1 worked out?

My thoughts: the excel 1 was louder than I expected (louder than the Festool pump), but I have no complaints regarding its suction capacity. My setup has the pump inside a closet and I run a hose out to the VAC-SYS - so the noise becomes a non-issue.

I haven't seen an excel 5 to compare. I'm happy with my excel 1 so ultimately I'm pretty sure you can't go wrong with either pump!

Thanks @Kriss!  Just out of curiosity, did you ever take a smartphone SPL meter (or real one) to it to see how it measured up to its advertised 45db?  I wonder if it's the pitch or if it specs higher. 

Haven't seen many vids from you lately.  Life getting in the way?   [tongue]
Current systainer to productivity ratio:  very high

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Online RobBob

  • Posts: 1267
Re: Vacuum Pump for VAC-SYS
« Reply #61 on: August 12, 2017, 05:48 PM »
How would the Festool pump work with vacuum bags?  Is it practical to get away with one pump for both Vac Sys and vacuum bag use?

Which of the three pumps would be best for both uses?
« Last Edit: August 12, 2017, 06:17 PM by RobBob »

Offline tjbnwi

  • Posts: 5591
  • Cedar Tucky Indiana
Re: Vacuum Pump for VAC-SYS
« Reply #62 on: August 12, 2017, 06:12 PM »
How would the Festool work with vacuum bags?  Is it practical to get away with one pump for both Vac Sys and vacuum bag use?

Which of the three pumps would be best for both uses?

The Festool pump is a continuous duty pump. Works just fine for vacuum bags.

Yes.

Tom

Offline live4ever

  • Posts: 771
Re: Vacuum Pump for VAC-SYS
« Reply #63 on: August 12, 2017, 08:19 PM »
How would the Festool pump work with vacuum bags?  Is it practical to get away with one pump for both Vac Sys and vacuum bag use?

Which of the three pumps would be best for both uses?

The Festool is (I believe) a 2 cfm pump, which would be totally fine for moderate sized vac bagging.  If you wanted to do larger vac bagging, I think the Excel 5 would be better.  If you look at veneersupplies.com, they have a chart comparing their systems, including the two continuous duty ones (Excel 1 and 5).  The Excel 1 is a 1cfm and supposedly can handle 4x4 bags (for flat work) and 2x4 curved.  The Excel 5 with 5cfm can do 4x15 or 6x10 flat and 4x6 curved.  So I would guess the Festool pump would spec somewhere in middle...
Current systainer to productivity ratio:  very high

Offline nachtschim

  • Posts: 1
Re: Vacuum Pump for VAC-SYS
« Reply #64 on: August 15, 2017, 12:03 PM »
Oke, just tuned-in on this topic....

I work for a comany named Becker. we are the inventor of the rotory vane vacuum pump.
I'm the head of service and technical matter within Belgium Netherlands and Luxembourg....
But enough about me!

the deeper the vacuum level, mbar, the stronger the grip. This is correct. But.....
all leakage will drain your vacuum so piping and hose connection are important.

I noticed the remark, that oil lubricated pumps blow out oil... than you are dowing it wrong!!! oil circulation speeds up when vacuum levels is boulding up. oil lubricated pumps need to work on max. vacuum level. when the max vacuum level is NOT reached oil circulation and pump effort increase. the internal oilcircualtion system is not build for draining maxx oilflow and starts blowing exessive oil.  because of the oil, all components get a almost zero clearance so almost absolute vacuum can be reached.-0mbar ab. or 1000mbar rel.  perfect for what you want.

the use of a softstarter or frequencyconverter protects your pump against the kick-in of electicity. this will damage your pump within a year.

oil free pumps, not so deep vacuum level but for your use oke. so much to choose from.
the deeper the vacuum level, the less flow. sow check for this!

for both pumps, make sure a vacuum savety valve is installed in, or externall with your pump.
when the max. vacuum is reached, flow almost stops. this means no more cooling of your pump internal.
vacuum pumps create hot exhaustair, dust in woodindustry, hot running pumps and poor maintenace, do i need to mention..... so a hot running pump because pulluted filtration lack of flow sawdust and so on, check it.

Filtration, put a pre filter between the vacuum connection and this will als save your pump.

maintenacen is crucial, replace your filters on time, keep bearings lubricated and check pump internaly. prefenting damage.....
Any further question, let me know.

money..... what ever you want just be save. invest in what you can affort. Goog luck!!!

Offline kelauben

  • Posts: 156
Re: Vacuum Pump for VAC-SYS
« Reply #65 on: May 21, 2018, 06:24 PM »
I've happened across a Robinair 15500 vacuum pump for a very good price.  It appears it would be a good pump for my own vac-sys creation being rated at 35 Micron.  If I do my conversions correctly this is well below the needed mBar.

Would anyone care to offer a comment on this pump in it's capacity to be used for both a vacuum clamp and vacuum press (not at the same time).

Thanks.

Karl

Offline Gregor

  • Posts: 834
Re: Vacuum Pump for VAC-SYS
« Reply #66 on: May 22, 2018, 04:56 AM »
I've happened across a Robinair 15500 vacuum pump for a very good price.  It appears it would be a good pump for my own vac-sys creation being rated at 35 Micron.  If I do my conversions correctly this is well below the needed mBar.

Would anyone care to offer a comment on this pump in it's capacity to be used for both a vacuum clamp and vacuum press (not at the same time).
The pump should do fine for both applications, as the end pressure is 3.5 orders of magnitude lower than the festool original pump it'll clamp 'harder' (as the pressure differential between the room and the suction cup is ~40% higher). For a vacuum press a vacuum reservoir (pressure vessel between pump and the valve to the press on which the pump can work prior to actually pressing) will speed up initial evacuation. Just put a separator infront of the intake that removes all solids (sawdust), a fine filter should do.

The 'change oil after each application' from the manual can most likely be ignored. Even should you let it run free for extended periods of time (which will pull in water vapor, from the air passing through, that condensates into the oil) you likely won't have a problem - end pressure will degrade but this is only relevant in case you do refrigeration (where you want best possible vacuum prior to filling coolant medium) - for your application it'll be good enough (even with non-new oil). As long as the oil dosn't foam it'll be fine, just exchange it once or twice a year.