Mid/tag lift axles air usage

Hey guys,

Odd question, doing a bit of research on behalf of someone.

Anyone know how much air it would require from the tanks (rough estimate of what the air gauges say will do but if you have more precise figures then that’d be better) to lift either a mid or a tag lift axle?

And also how much air it would use/expend when you raise them again?

Thanks in advance.

About 7.5 bar .

seth 70:
About 7.5 bar .

I don’t think it uses that much, maybe there has to be that much in the tanks to get it to go up.

I suppose the best way to explain what I need is (unless you’re a fitter and happen to know the exact amounts) is to sit in the cab with full up to pressure air and then fully lower and then raise again the axle, how much air would you have used and was it more lowering than raising

An e.g. - needle dropped to around 3/4 of a full system of __bar and it was 60/40 (lower/raise)

I know modern compressors recharge pretty darn quick in newer modern motors but Its the air used I’m after

Many thanks.

Ok, pressure (psi/bar) is getting muddled with volume (cfm/m3).

The lifting part will consume air to lift it but none to lower. It raises by inflating one or more air bags identical to regular suspension bags. It won’t need much pressure just enough to lift the axle but, it will use air to fill the actual suspension bags when lowered and use none by exhausting that air when the axle is raised.

So basically it is the air required to fill one air bag to raise and the air required to fill two air bags when lowered - and this will be more than 2x the air to raise as it will have to lift the weight of the load.

How much air? I haven’t really got any idea but not a lot in the scheme of things but it will be significantly more lowering.