The Iran Heavy Diesel Manufacturing Company (Persian: شركت صنعتی وتولیدی ديزل سنگين ايران‎ Šerkat-e sanʿati wa-tawlidi-ye dizel-e sangin-e Irān, abbreviated دسا DESA) is an Iranian company manufacturing heavy diesel engines from 200 to 3500 kW for railway, marine and power generation purposes.