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Vacuum Pump

BobL

Joined: 1-01-70

Topics: 1

Replies: 7

Posted: Sat 30th Jan 2010, 12:46pm
Vacuum Pump

We are designing a new 24v Petrol/Electric loco for the Bristol Club for heavy duty hauling. Any information on vacuum pumps would be appreciated. I understand mechanical vehicle pumps may need a separate oil feed which is complication I do not think we do not want for a club loco. Information on experience with electrical driven vacuum pumps would be welcome. What about pumps used for cruise control on cars?
I understand they may have been discussion in "71/4 News". If anybody could give me issue numbers I can download them.
Thanks. Bob L
 

Replies To This Post

johndodd

Joined: 12-05-00

Topics: 1

Replies: 3

Posted: Sun 31st Jan 2010, 3:51pm

We have used Peugot/Citroen 1.4 and 1.9 diesel engine brake vacuum pumps,the ones driven by a fan belt not the ones bolted to the camshaft.These were obtained from car breakers for not much money.They dont need oil supply but make sure the diaphram is not leaking.Power source has usually been 12v wiper or fan motors but could very easily be belt driven.I would recommend from experience they be geared to run at less than 200 rpm and use a reservoir.Vacuum switches or dump valves give good control of vacuum pressure.these are easily obtained from RS or PNP.John D
 

BobL

Joined: 1-01-70

Topics: 1

Replies: 7

Posted: Mon 1st Feb 2010, 5:29pm

Thanks John that is very helpful. Just the sort of advice I was looking for.
Bob
 

micksavage

Joined: 1-01-89

Topics: 7

Replies: 114

Posted: Tue 9th Feb 2010, 9:53pm

At Sheffield SMEE's Abbeydale Miniature Railway we use Cromar White 12v electric vacuum pumps, they are industrial standard and fairly compact.
 

BobL

Joined: 1-01-70

Topics: 1

Replies: 7

Posted: Sat 20th Feb 2010, 5:11pm

Many thanks for the helpful replies. I have purchased a Thomas 12vdc vacuum pump government surplus on ebay from USA. Comes with gauge and vacuum setting control and draws 4A. I am sure it will do the job. Approx. £50 to buy plus £50 carriage, VAT and charges. Still not a bad buy.
 

rogerbrown

Joined: 1-01-85

Topics: 6

Replies: 35

Posted: Mon 20th Sep 2010, 10:50pm

We purchased brand new Pierburg vacuum pumps that are used on cars and we obtained these from Hans Motors in Birmingham. I seem to remember that I bought them for around £50 a unit though this was in 2008. According to the data sheet they draw around 75w, though we have not confirmed this yet.

http://www.hansmotors.co.uk
 

BobL

Joined: 1-01-70

Topics: 1

Replies: 7

Posted: Sat 20th Nov 2010, 11:26am

Thanks Roger
Sorry to be so late in replying. We finished up with the Thomas Industrial Diaphragm Vacuum Pump 12v dc which takes about 4 Amps. We got it on ebay from the States and it works well but I will look into the Pierberg pump as it could be very useful.
Thanks again
Bob
 
 
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