Vulkan 1.8 CFM vacuum pump

Hi

I would like to recommed a light vacum pump to my students.

I use a JB 5CFM but it is so heavy ( 16kg).

Bought a 1.8 CFM 2 stages pump and it is only 8kg

I imagine vacum time would be problem, but is it possible to use this pump
to small units or even larger units ?

Moises