Works with Ethanol & C6/C7. Betting it’s worth a try with with C4.
EtOH documented here: It washes the cannabis and then it washes the cannabis some more
Heptane here: Help setting up a higher output extraction station - #21 by SidViscous
As @thesk8nmidget noted, OEM is sending a flowmeter.
Along with the pump I mentioned.
So your mileage may vary on how far you can vary before you need a variance from an engineer…