CASING OF PUMP UNIT AND PUMP DEVICE HAVING THEREOF

摘要

A pump unit casing and a pump apparatus having the same are provided to reduce noise from engaging bolts between pump units and a valve unit by using sound insulation walls. In a pump unit casing, a valve unit(24) is disposed between two pump units(22,23). One end of the casing is locked in the pump unit and the other end is locked in the valve unit. The pump units and the valve unit are engaged with engaging bolts. The pump unit casing includes sound insulation walls covering an engagement member so that noise from engaging bolts of the engagement member is insulated. The sound insulation walls can insulate noise from 2 kHz to 6 kHz.