Companies controlled by Greek owner Diamantis Diamantidis have signed up for 10 scrubbers systems.
Finland's Langh Tech will deliver the exhaust gas cleaning systems for bulkers and a tanker owned by Marmaras Navigation and Delta Tankers.
Retrofitting will be carried out on nine 92,000 post-panamaxes and a 114,000-dwt aframax.
Langh is supplying open-loop hybrid-ready kits, with options for more attached, it said.
