The Forestry Forum is sponsored in part by:

iDRY Vacuum Kilns


Forestry Forum
Sponsored by:


TimberKing Sawmills



Toll Free 1-800-582-0470

LogRite Tools



Norwood Industries Inc.




Your source for Portable Sawmills, Edgers, Resaws, Sharpeners, Setters, Bandsaw Blades and Sawmill Parts

EZ Boardwalk Sawmills. More Saw For Less Money!

STIHLDealers.com sponsored by Northeast STIHL


Woodland Sawmills

Peterson Swingmills

 KASCO SharpTech WoodMaxx Blades

Turbosawmill

Sawmill Exchange

Michigan Firewood, your BRUTE FORCE Authorized Dealer

Baker Products

ECHO-Bearcat

iDRY Wood Lumber Vacuum Drying for everyon

Nyle Kiln Dry Systems

Chainsawr, The Worlds Largest Inventory of Chainsaw Parts

Smith Sawmill Service



Author Topic: Vaccum Pumps  (Read 2310 times)

0 Members and 1 Guest are viewing this topic.

Offline Radar67

  • Senior Member x2
  • *****
  • Posts: 3916
  • Age: 155
  • Location: Collins/Seminary, MS
  • Gender: Male
  • Cuttin Wood Now For My House Later.
    • Share Post
    • Stewart Photography
Vaccum Pumps
« on: May 20, 2006, 12:22:33 PM »
Anyone know of a source for a vaccum pump that will pull 20 - 25 inches of mercury? This is for small scale on a 1 to 5 gallon tank. I'll be using it to stabilize small blocks of figured wood.

Stew
"A man's time is the most valuable gift he can give another." TOM

If he can cling to his Blackberry, I can cling to my guns... Me

This will kill you, that will kill you, heck...life will kill you, but you got to live it!

"The man who can comprehend the why, can create the how." SFC J

Offline Larry

  • Senior Member x2
  • *****
  • Posts: 6325
  • Age: 72
  • Location: NW Arkansas
  • Gender: Male
    • Share Post
    • Copas Sawmill
Re: Vaccum Pumps
« Reply #1 on: May 20, 2006, 01:04:45 PM »
This one.

Surplus Center vacuum pump

Iíve used my pump hard for several vacuum experiments.  One was stabilizing wood with a pentacryl/home brew mix.

Itís a commercial duty pump...only draw back it's 220V.  Couple more inches vacuum would reduce the heat requirement for bag drying.  Guess ya canít have everything for this price though. ;D
Larry, making useful and beautiful things out of the most environmental friendly material on the planet.

We need to insure our customers understand the importance of our craft.

Offline Radar67

  • Senior Member x2
  • *****
  • Posts: 3916
  • Age: 155
  • Location: Collins/Seminary, MS
  • Gender: Male
  • Cuttin Wood Now For My House Later.
    • Share Post
    • Stewart Photography
Re: Vaccum Pumps
« Reply #2 on: May 20, 2006, 02:25:28 PM »
Larry, thanks for the link.

I can run the 220 off my generator with no problem. I read that this is a continuious duty pump, can it be used to pull the vaccum to 20 inches then close a valve and shut the pump down?

I'm new at this so please bear with me, I'm learning as I go.  :)

Stew
"A man's time is the most valuable gift he can give another." TOM

If he can cling to his Blackberry, I can cling to my guns... Me

This will kill you, that will kill you, heck...life will kill you, but you got to live it!

"The man who can comprehend the why, can create the how." SFC J

Offline Larry

  • Senior Member x2
  • *****
  • Posts: 6325
  • Age: 72
  • Location: NW Arkansas
  • Gender: Male
    • Share Post
    • Copas Sawmill
Re: Vaccum Pumps
« Reply #3 on: May 20, 2006, 04:41:53 PM »
I think the pump would work fine in that application Stew.

A venturi pump or even an old fridge compressor might also work for you.  You need an air compressor to run a venturi pump...but the pump is cheap.

Another link with all kinds of gadgets and ideas.

http://www.joewoodworker.com/

The stuff is mainly for making veneer presses.
Larry, making useful and beautiful things out of the most environmental friendly material on the planet.

We need to insure our customers understand the importance of our craft.

Offline thurlow

  • Senior Member x2
  • *****
  • Posts: 1116
  • Age: 76
  • Location: Lauderdale County, TN
  • Gender: Male
    • Share Post
Re: Vaccum Pumps
« Reply #4 on: May 20, 2006, 05:48:50 PM »
I've used a  compressor from an old air conditioner (220 A.C.) to pull the vacuum on my farm equipment air conditioners for about 20 yrs.  It only laks this much ()  8) pulling 30 inches of mercury.
Here's to us and those like us; DanG few of us left!

Offline Radar67

  • Senior Member x2
  • *****
  • Posts: 3916
  • Age: 155
  • Location: Collins/Seminary, MS
  • Gender: Male
  • Cuttin Wood Now For My House Later.
    • Share Post
    • Stewart Photography
Re: Vaccum Pumps
« Reply #5 on: May 21, 2006, 01:29:55 AM »
Larry, that venturi pump my be the ticket for what I'm working on.

Thurlow, you got any info, diagrams or anything about how to set up an AC compressor?

Somebody correct me here if this is wrong. From reading some of the other posts, I gather that 50 torr is roughly equal to 28 inches of mercury (Hg) and at that level, water will boil at 84 degrees. At these levels, without a heat source, the chamber will cool down because of the vapor leaving the wood. Is my understanding of this correct?

Stew
"A man's time is the most valuable gift he can give another." TOM

If he can cling to his Blackberry, I can cling to my guns... Me

This will kill you, that will kill you, heck...life will kill you, but you got to live it!

"The man who can comprehend the why, can create the how." SFC J

Offline iain

  • Senior Member x2
  • *****
  • Posts: 1231
  • Age: 59
  • Gender: Male
  • bonnin stuff
    • Share Post
    • Leafbone Furniture
Re: Vacuum Pumps
« Reply #6 on: May 21, 2006, 04:52:15 AM »
Here's a couple of links for you to be going on with

the second one will answer you question about 50 Torr

the first one is more info than you can shake a stick at

I've got both air and water venturi valves
one works of my compressor the other of a running tap both pull around 95%

i use a vacuum cleaner to get most of the air out, then hook up the venturi at 150psi a 150 litre tank lasts about an hour if i leave it hissing

if you got a good air tight seal with no leaks you can shut to valve and leave it sucked BUT IF YOU ARE EVER VENEERING KEEP AN EYE ON IT


iain

Offline Den Socling

  • Senior Member x2
  • *****
  • Posts: 4217
  • Age: 70
  • Location: Jersey Shore, Pennsylvania
  • Gender: Male
  • just wondering
    • Share Post
Re: Vaccum Pumps
« Reply #7 on: May 21, 2006, 08:57:39 AM »
Yep. '28 inches' refers to the removal of 28 of the 30 inches in one atmosphere. That leaves 2 inches. 2 x 25.4 = 50.8 mmHg (or 50.8 torr).

At 50 torr, the boiling point is closer to 100'F. You have to get down to 30 torr to achieve 84'F.

When water changes from liquid to vapor, the vaporized molecule carries heat with it and the water left behind is cooler. Cooler water has lower vapor pressure so less will vaporize.

Offline Radar67

  • Senior Member x2
  • *****
  • Posts: 3916
  • Age: 155
  • Location: Collins/Seminary, MS
  • Gender: Male
  • Cuttin Wood Now For My House Later.
    • Share Post
    • Stewart Photography
Re: Vaccum Pumps
« Reply #8 on: May 21, 2006, 12:28:38 PM »
Thanks for the correction Den.

Ian, where did you hide the links?  :D

Stew
"A man's time is the most valuable gift he can give another." TOM

If he can cling to his Blackberry, I can cling to my guns... Me

This will kill you, that will kill you, heck...life will kill you, but you got to live it!

"The man who can comprehend the why, can create the how." SFC J

Offline iain

  • Senior Member x2
  • *****
  • Posts: 1231
  • Age: 59
  • Gender: Male
  • bonnin stuff
    • Share Post
    • Leafbone Furniture


Share via delicious Share via digg Share via facebook Share via linkedin Share via pinterest Share via reddit Share via stumble Share via tumblr Share via twitter

xx
Vaccum/pressure test an 011

Started by Roundhead on Chainsaws

1 Replies
494 Views
Last post November 05, 2013, 10:24:58 AM
by AdkStihl
xx
Homemade Vaccum Sealer

Started by splitter on FOOD! FOOD! FOOD!

8 Replies
2025 Views
Last post August 31, 2009, 07:37:45 PM
by Reddog
xx
Vaccum kiln and insects

Started by kderby on Drying and Processing

3 Replies
1438 Views
Last post April 27, 2011, 09:14:58 PM
by Bill Gaiche
xx
Please welcome our newest sponsor! iDRY Vaccum kilns

Started by Jeff on General Board

18 Replies
1301 Views
Last post December 02, 2018, 08:04:14 AM
by fishpharmer
 


Powered by EzPortal