Depending on the pump model, a reversible pump head can be adapted to SV, AV and DV valves. Simply remove the valve insert inside the pump head, turn it around and reinsert it. The exact procedure may vary depending on the model. Here are some examples showing how to switch between the different valve types:
Electric Minipump EMP
AIRFLEX Minipump
A rotating movement releases the mechanism, pull the head apart – done.
ROOKIE Minipump
AIRBUSTER CO2 and AIRCHAMP PRO CO2