An electromagnetically actuatable proportional valve (1), in particular differential pressure valve for use in CO2 air conditioning compressor arrangements, comprising an electromagnetic actuator (3) for adjusting a valve body (2) relative to a valve seat (5), wherein the valve seat (5) is assigned a first pressure connection (7), via which a fluid can flow bypassing the valve body (2) to a second pressure connection (9), wherein the valve body (2) delimits a diffuser chamber (30) which with the valve body (2) lying against the valve seat (5) is connected in a fluid-conducting manner with the first pressure connection (7) via a fluid connection (22) delimited by the valve body (2).