Compressor / Pneumatic / Electrical Guru's

[IainB]

In my search for new toys, Ive aquired £600 worth of ABAC's finest compressor pump http://www.abac-support.co.uk/Pumps/B6000.htm (yes...its a touch large). I didnt pay £600 - managed to get it FOC

Now a pump of this calibre would turn its nose up at a puny 50L Clarke compressor / receiver, which I have since sold (actually, it would have been too big to fit anyway)

This morning found me doing a small road trip down to see the 'toy' and pick up a S/H receiver.....slightly bigger at 300L and another pump that came with it (note to self - 300L receivers are BIG and cast iron pumps to fill such a best are chuffing heavy) managed to fit it in the Mondy (just)

Anyway - the reason, finally, for this post. The ABAC ideally needs a 7.5hp motor to run it, which would mean 3 phase, as im domestic single phase - the highest I can go is 3HP (or thereabouts) and this is where I get confused. The pump is spec'd to run at 1450RPM, a lot of the single phase motors Ive seen are running higher RPM's so - if I used a small V belt pully on the electric motor - would this give any torque advantage to the motor and hence pump - with the pump still spinning at approx 1450RPM?

 

[IainB]

What sort of power supply do you have available?

Overkill comes to mind

One of my infamous (and stupid) ideas....no replacement for displacement and all that though I think a 150L receiver would have worked fine! Now its on the garage and we have 'chucked' the old pump on - I am thinking...oops its a bit big!

Im running off a std main - really need to put in a dedicated supply, but its a lot of hassle and not high on my list of things to do at the minute

Will get a picture tomorrow of the space available

 

[IainB]

Pics as promised....

This is the old pump unit (now on E-Bay!) they both must be moving some air - as the inlet into the receiver is err 1 1/4 inches wide

This is the new ABAC pump in place - as you can see I have a 'little' room to play with for the positioning of the motor

Apologies for the state of the garage - still have to finish building the shed and clearing out my old E30 bits!!

 

[IainB]

Just wondering, what you going to use all that air for? Storing it up for when we all run out?

I have a couple of tools that eat air, and if I want to spray 2 pack, I can feed my mask and gun without it running out....but...it is a bit bigger than the pics looked before I went to see it!!

And I guess - if I want to sell it on a get something smaller, the current cost to me (£50 minus anything I get for the old pump unit) I can get back when its all up and running - the same size from someone like ABAC are >1K+

 

[IainB]

Can you measure the distance between centres of those slots the motor will mount on?

Will explain this as best I can!!
Distance between the 2 elongated slots at its shortest is 10 cms at its longest is 18 cms. Moving onto length ways between the 1st and 2nd is 16 cms and between the 1st and 3rd is 19 cms.

I did notice that the pulley on the pump is approximately 7cms out – so im guessing I need something with a longer shaft and/or more support away from the foot of the motor

Pulley V's are 13mm at the top (didnt get a bottom V measurement) pulley is 43cm's in diameter and the bolt width (for the motor slots is 12mm)

 

[IainB]

You mentalist

Can I bring down the Supra to spray it?

Let me get it all working, then feel free - its a bit of an animal isnt it!!

 

[IainB]

The bottom line is that if the compressor requires 7.5 HP to get it's rated airflow and pressure, then no amount of messing with pulleys will fix it. You can run it slower to reduce the HP requirement, but obviously airflow will be reduced accordingly.

A 30 Amp single phase supply is possible to have installed in a domestic building, but without this you are stuck with about 3.5hp, which could potnentialy run the compressor at around half speed, with half the airflow.

Thanks Dogbreath,
Been having a convo with Llyr over MSN regarding this, normally (pfft! - me - normal) I wouldnt have got a pump that needs this sort of HP, but I defy anyone to turn down a freebie of this type....just want it working better than my 'Clarke use an air tool for 30 seconds then wait for it to catch up again' compressor.