Thanks: 0
Likes: 0
Needs Pictures: 0
Picture(s) thanks: 0
Results 1 to 8 of 8
Thread: re pump
-
14th July 2015, 08:47 PM #1GOLD MEMBER
- Join Date
- Sep 2008
- Location
- texas, queensland
- Posts
- 1,239
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.'
-
14th July 2015 08:47 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Posts
- Many
-
14th July 2015, 11:22 PM #2Senior Member
- Join Date
- Jun 2013
- Location
- Geelong
- Posts
- 429
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
-
15th July 2015, 12:18 AM #3
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
-
15th July 2015, 07:54 AM #4GOLD MEMBER
- Join Date
- Sep 2008
- Location
- texas, queensland
- Posts
- 1,239
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.'
-
16th July 2015, 12:21 PM #5
Hi Johno,
We have these ones if you are looking to use vacuum.
http://www.perfectpensandpencils.com...egory=12172761
Cheers
Tony
-
17th July 2015, 07:31 PM #6GOLD MEMBER
- Join Date
- Sep 2008
- Location
- texas, queensland
- Posts
- 1,239
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.'
-
18th July 2015, 12:45 PM #7Neil____________________________________________Every day presents an opportunity to learn something new
-
18th July 2015, 05:10 PM #8GOLD MEMBER
- Join Date
- Sep 2008
- Location
- texas, queensland
- Posts
- 1,239
Similar Threads
-
Washing machine pump as a coolant pump
By BobL in forum METALWORK FORUMReplies: 47Last Post: 23rd August 2015, 02:12 PM -
Oil pump
By Michael G in forum METALWORK FORUMReplies: 2Last Post: 5th October 2013, 08:54 AM -
Gear Pump
By twistedfuse in forum CNC MachinesReplies: 8Last Post: 31st December 2010, 03:50 AM -
Pump
By dj_pnevans in forum NOTHING AT ALL TO DO WITH WOODWORKReplies: 3Last Post: 31st August 2009, 10:51 PM -
Pump Down
By rod1949 in forum NOTHING AT ALL TO DO WITH WOODWORKReplies: 11Last Post: 24th January 2006, 08:48 PM