VEVOR Air Hydraulic Pump, 10,000 PSI Hydraulic Foot Pump, 0.6 Gal Reservoir Foot Operated Air/Hydraulic Pump, with Hose and Spray Gun for Heavy Machinery Rigging, Auto Repair, Auto Body Frame Machines

You can use it directly without refueling. There is a difference in oil capacity between the 2.3L and 1.6L pumps. If the object used (such as a press, jack, etc.) has a capacity of less than 1.6L, you can use both. If it exceeds 1.6L, you will need to use 2.3L of this product.

There are no volume or pressure requirements for this product. If you are referring to the air source pressure, then it is between 0.7Mpa ~1.0 Mpa.

This isn’t that kind of pump. It’s a pump for like a porta power cylinder/ram. You run the pump to cycle the ram and then retract it. CFM of the compressor doesn’t apply as much as something with suitable working psi and a small reservoir to supply air. Hope this helps but this isn’t a continuous pump as it uses its own self contained oil supply to supply it and would run dry if you ran it for any length of time where cfm came into play.

This product can be used if the cylinder pressure is within 10,000pis and the oil volume is within 2.3L.

It can be used if the pressure requirement is within 10,000 psi.