Sulzer AT25 is a modernized version of Sulzer AS25. AT25 comes with a four valve cylinder head set up which includes 2+2 bore-cooled valves. AT25 can operate both on MDO and HFO while AS25 have two models which can operate either on MDO or HFO. MDO version of AS25 does not have bore-cooling of cylinder head.
Sulzer S20 is a classic 4 stroke engine with number of cylinders ranging from 4 to 9. Sulzer made the journal diameters of this engine sizable to achieve high torsional rigidity. Additionally, S20 offers low operational costs due to easy maintenance and long maintenance intervals.
Sulzer AL20/24 is manufactured in several variants but most commonly manufactured variants are 6 cylinder (6AL20/24) and 8 cylinder (8AL20/24) versions. These engines work as the main engine (propulsion) of small vessels with great results.
Using clean-burning fuels such as liquefied natural gas (LNG) are becoming more of an attractive option as they satisfy all emission requirements. Moreover, fluctuations in the fuel market make the plant owners reconsider their options when it comes to choosing the right fuel. Dual-fuel engines MAN 32/40DF, MAN 48/60DF, MAN L28/32DF, MAN L23/30DF, MAN L35/44DF, MAN 51/60DF, can simply switch between gas and liquid fuels which offer a great advantage when it comes to flattening the fuel expenditure curve and reducing emissions. The plant owners can additionally benefit from low operational and maintenance costs of these engines thanks to burning cleaner fuels which results in cleaner engine components.
To reduce the formation of smoke which results in reduced fuel consumption and cleaner exhaust, MAN L23/30H utilizes a built-in lambda controller which greatly increases the unit’s load response ability and limits the fuel oil index during the start-up procedure and sudden load changes.
A classic feature of Sulzer Z-type engines SULZER ZA, SULZER ZAS, SULZER Z40, SULZER ZA40, SULZER ZA40S is the rotating piston. This Sulzer patented concept with cylinder bores from 90 mm to 420 mm for highly loaded trunk piston engines has the following benefits:
-Even temperature distribution around the piston crown
-Minimum piston skirt deformation
-Optimum sealing and working conditions for the piston rings
-Low and stable lubricating oil consumption thanks to the small piston running clearances
-Smallest risk of seizure between the piston and the cylinder liner