3097433 overflow valve, with alternatives 7403097433 and 20765317, is a key pressure control part for Volvo trucks. It stably regulates fuel system pressure to avoid overpressure damage and ensure smooth fuel supply. Made of wear-resistant steel, it works reliably under frequent start-stop conditions. Standard thread and interface enable direct replacement. It effectively keeps engine running stably, a necessary spare part for Volvo commercial vehicle maintenance fleets.