Munthe, D.J. , Lingga, J. , Jufrizal, J. and Idris, M. 2025. The Effect of Valve Opening Variation on System Performance in Series and Parallel Pump Configurations. IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA). 4, 1 (Apr. 2025), 105–119. DOI:https://doi.org/10.56862/irajtma.v4i1.185.