Engines type L21/31 are built under MAN B&W Diesel licence and they are used as generating sets in marine and stationary applications.
They are new generation engines, with ultra modern design, technologically advenced, and achieve the highest performance parameters. The long piston stroke enables economic and pure combustion of heavy fuel oils (HFO) with viscosity up to 700 cSt. Modular construction allows for quick overhauls. Cooling water and lubricating oil systems are closed, and their agents are led by passages which are cast inside the engine frame, front end box and through thermostat housing.

L21/31 - stationary and marine version

Cylinder bore (mm) - 210
Piston stroke (mm) - 310
Stroke volume (liter/cyl.) - 10, 7
Number of cylinders - 5, 6, 7, 8, 9
Cylinder output (kW/cyl.) - 190-215 (stationary version)
Cylinder output (kW/cyl.) - 200-220 (marine version)
Speed range (rpm) - 900-1000
Mean effective pressure (bar) - 22.4/24, 8 (stationary version)
Mean effective pressure (bar) - 22.4/27, 3 (marine version)
Power range (kW) - 950-1935 (stationary version)
Power range (kW) - 1000-1980 (marine version)

Apart from basic products, we also offers:
- a wide range of original spare parts for Diesel engines,
- power plants equipment,
- service,
- consulting in the field of optimal selection of marine and
stationary generating sets and main propulsion engines.