Question on air/hydraulic booster attached to bottle jack

[GNBrews]

How do these units work?

Do they share a common fluid reservoir with the jack body or do they have their own? Or, does the fluid just self-level between the two parts?

Is it possible to put an adjustable relief valve on the oil side (between the booster and jack) to regulate the maximum pressure applied to the jack (I'd rather not mess with the working air pressure)? If so, where should the overflow line go back to?

Would I need to install a breather on the reservoir (wherever it is)?

Thanks guys.

 

[budt]

I'm sure you have a very good reason for (I'd rather not mess with the working air pressure) but that would be simple and cost practically nothing, be very easy to adjust force and save air also.

I am not familiar with this type jack but I would say the Manual and Air-Oil Intensifier pumps share the same reservoir.

Adding a Relief Valve would require you to drill and tap holes in the right place to tap in to output pressure from the Manual or Air-Oil pump and another hole to port it back into the Jack's reservoir. Not impossible but could be a problem if you happen to drill into a present passage at the wrong place.


Budt

 

[unclesyd]

This type jack has been around for years. Normally it would be on wheels and resemble a floor jack.
I believe the Torin you have pictured has what is incorrectly called a turbo pump. This is just air operated piston pump that does the work for you and allows you to use the hand pump if needed.
These jacks all have internal bypass and relief valves. Normally the air pump will use a 90-150 psig supply. The ones that I’m familiar with will blow a diaphragm if you use a higher pressure air/gas supply.
If you notice you have two bosses at the base of the air pump if you would like to add a auxillary oil supply or take off a pressure tap. Normally on bottle jacks one boss is one the pressure side and the other is on reservoir side.

The air pump on this model looks mighty good compare to some I've seen.