Thanks Thanks:  0
Likes Likes:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 8 of 8

Thread: re pump

  1. 14th July 2015, 08:47 PM #1
    texx
    texx is offline GOLD MEMBER
    Join Date
    Sep 2008
    Location
    texas, queensland
    Posts
    1,239

    Default re pump

    G,day just wondering if anyone has ever tried a milking machine pump for vacuum , and if they pull enough vac .
    i want to get into the casting and stablising ( been selling quite a few pens the last few years and i have some blanks that i have been leaving unused because of not have vac or pressure set up ), i have a pressure pot ready to go i will build a vac chamber (dont have any resin though , i will have to grab some of that stuff from the green shed for now ) , i have some cactus juice ordered so apart from a heap of fittings which i can probably make on the lathe all i need is a vacuum pump .
    i already have an old alfa laval small milking machine , its a rotary vane pump was powered by a honda but i have removed that and retro fitted a lekky motor. what i dont have is a vac gauge . i will be in toowoomba tomorrow so while there i can get a gauge from somewhere ( dont know where yet though ).
    so any pump gurus in here that know how much vac a milking machine can pull???.

    johno
    'If the enemy is in range, so are you.'
    Reply With Quote Reply With Quote
  2. 14th July 2015 08:47 PM # ADS
    Google Adsense Advertisement
    Join Date
    Always
    Location
    Advertising world
    Posts
    Many





     
  3. 14th July 2015, 11:22 PM #2
    Wrongwayfirst
    Wrongwayfirst is online now Senior Member
    Join Date
    Jun 2013
    Location
    Geelong
    Posts
    428

    Default

    According to professor Google milking machine vacuum pumps operate at 50kpa around 14" Mercury. You could make a simple manometer with clear tube to test it is still a working unit. 20" down and 20" up should suffice now you know the standard operating pressure
    Reply With Quote Reply With Quote
  4. 15th July 2015, 12:18 AM #3
    dai sensei's Avatar
    dai sensei
    dai sensei is offline Wandering in search of timber
    Join Date
    Apr 2005
    Location
    Nerang Queensland
    Age
    66
    Posts
    10,766

    Default

    Quote Originally Posted by Wrongwayfirst View Post
    According to professor Google milking machine vacuum pumps operate at 50kpa around 14" Mercury. You could make a simple manometer with clear tube to test it is still a working unit. 20" down and 20" up should suffice now you know the standard operating pressure
    If that is all it pulls, no it's not enough, you need >28" for stabilisation. Relatively cheap on Ebay for a 2 stage 3cfm unit like this one http://www.ebay.com.au/itm/High-Effi...item33a22621f5

    You only cast with pressure, not vacuum, accept for pure resin casts just to remove the bubbles out of your mix.
    Neil
    ____________________________________________
    Every day presents an opportunity to learn something new
    Reply With Quote Reply With Quote
  5. 15th July 2015, 07:54 AM #4
    texx
    texx is offline GOLD MEMBER
    Join Date
    Sep 2008
    Location
    texas, queensland
    Posts
    1,239

    Default

    Quote Originally Posted by Wrongwayfirst View Post
    According to professor Google milking machine vacuum pumps operate at 50kpa around 14" Mercury. You could make a simple manometer with clear tube to test it is still a working unit. 20" down and 20" up should suffice now you know the standard operating pressure
    yeah but milking machines operate with restrictors and pulse valves in the system which pulses the milk flow rather than a continual suck .this one had a 2 outlet stainless diaphram valve in the line , it would be spring load to operate at a set vac then release . well i think thats what it does .
    anyway thanks for the replies guys .
    johno
    'If the enemy is in range, so are you.'
    Reply With Quote Reply With Quote
  6. 16th July 2015, 12:21 PM #5
    Perfect Pens's Avatar
    Perfect Pens
    Perfect Pens is offline GOLD MEMBER
    Join Date
    Jul 2010
    Location
    Shailer Park Brisbane Southside
    Age
    62
    Posts
    1,320

    Default

    Hi Johno,

    We have these ones if you are looking to use vacuum.
    http://www.perfectpensandpencils.com...egory=12172761

    Cheers
    Tony
    Pen Components and Speciality Blanks - perfectpensandpencils.com.au
    www.facebook.com/perfectpensandpencils
    Visit our Sponsors Forum

    Reply With Quote Reply With Quote
  7. 17th July 2015, 07:31 PM #6
    texx
    texx is offline GOLD MEMBER
    Join Date
    Sep 2008
    Location
    texas, queensland
    Posts
    1,239

    Default

    ok picked up a vacuum gauge on wednesday from toowoomba fitted it yesterday and ran the pump messed around with a few different pullys and the best i could get the old milking machine to pull was 24 and that was probably running it a bit quicker than it likes to run at . so i will be buying a vac pump off ebay by the looks .
    i also bought a handy little oven from aldi 79 bucks and a dehydrator from the good guys, went a bit upmarket on that one $190 .
    this pump appeals to me .

    http://www.ebay.com.au/itm/VACUUM-PU...item27d2a2540b

    johno

    oh yeah bought some polycarbonate sheet from the big green shed 400x400x12.5mm was going to make a tank with that then after rethinking i rekon i will just make 2 opposing sides with that and the other 2 sides from well sealed timber that should make gluing easier if i route a rebate for the poly sheet to sit in .
    'If the enemy is in range, so are you.'
    Reply With Quote Reply With Quote
  8. 18th July 2015, 12:45 PM #7
    dai sensei's Avatar
    dai sensei
    dai sensei is offline Wandering in search of timber
    Join Date
    Apr 2005
    Location
    Nerang Queensland
    Age
    66
    Posts
    10,766

    Default

    Quote Originally Posted by texx View Post
    ..oh yeah bought some polycarbonate sheet from the big green shed 400x400x12.5mm was going to make a tank with that then after rethinking i rekon i will just make 2 opposing sides with that and the other 2 sides from well sealed timber that should make gluing easier if i route a rebate for the poly sheet to sit in .
    Hate to tell you but Polycarbonate reacts with Cactus Juice (and probably others) and the clear turns to white. So unless you are using it as a lid on a SS/metal bucket/tank type I would advise against it.
    Neil
    ____________________________________________
    Every day presents an opportunity to learn something new
    Reply With Quote Reply With Quote
  9. 18th July 2015, 05:10 PM #8
    texx
    texx is offline GOLD MEMBER
    Join Date
    Sep 2008
    Location
    texas, queensland
    Posts
    1,239

    Default

    Quote Originally Posted by dai sensei View Post
    Hate to tell you but Polycarbonate reacts with Cactus Juice (and probably others) and the clear turns to white. So unless you are using it as a lid on a SS/metal bucket/tank type I would advise against it.
    oh bugger well that shot that idea straight out the window .

    johno
    'If the enemy is in range, so are you.'
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Similar Threads

  1. Washing machine pump as a coolant pump
    By BobL in forum METALWORK FORUM
    Replies: 47
    Last Post: 23rd August 2015, 02:12 PM
  2. Oil pump
    By Michael G in forum METALWORK FORUM
    Replies: 2
    Last Post: 5th October 2013, 08:54 AM
  3. Gear Pump
    By twistedfuse in forum CNC Machines
    Replies: 8
    Last Post: 31st December 2010, 03:50 AM
  4. Pump
    By dj_pnevans in forum NOTHING AT ALL TO DO WITH WOODWORK
    Replies: 3
    Last Post: 31st August 2009, 10:51 PM
  5. Pump Down
    By rod1949 in forum NOTHING AT ALL TO DO WITH WOODWORK
    Replies: 11
    Last Post: 24th January 2006, 08:48 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules