X72-B

X72-B

Designed with vessel efficiency and environmental friendliness in mind

EEDI regulations, low vessel emissions, and operational flexibility have been key considerations in designing the X72-B as the preferred engine for new merchant vessels. The new engine offers high levels of propulsion efficiency resulting from its lower engine revolutions. The wide rating field presents increased flexibility for selecting the most efficient propeller speed, thus giving minimised daily fuel consumption, by using the appropriate propeller diameter for the projected ship design and mission profile.

For vessels with draught restrictions affecting the propeller diameter, a higher propeller speed can be selected. This, together with the favourable piston dismantling height, makes this engine very attractive for Suezmax tankers, Capesize bulk carriers, as well as Panamax and Sub-Panamax container vessels.

Fuel Types

  • D D

Vessel types

  • Tanker
    Tanker
  • Container Vessel
    Container Vessel
  • Bulk Carrier
    Bulk Carrier
  • Multipurpose Vessel
    Multipurpose Vessel
  • Gas Carrier
    Gas Carrier

  • High reliability

    Based on the X72 with proven reliability

  • Low service costs

    Long Time Between Overhaul

  • Dual-fuel ready

    LNG/Methanol/Ammonia

Engine details

Definitions Download

X72-B

IMO Tier II/Tier III (SCR)
Cylinder bore
720mm
Piston stroke
3086mm
Speed
66-89rpm
Mean effective pressure at R1
21bar
Stroke/bore ratio
4.29

Rated power, principal dimensions and weights

Output in kW at
89rpm 66rpm Length A
mm		 Dry mass
tonnes
Cyl. R1 R2 R3 R4
5 19600 14300 14550 10600 8085 481
6 23520 17160 17460 12720 9375 561
7 27440 20020 20370 14840 10665 642
8 31360 22880 23280 16960 11960 716
Output in kW at
89rpm 66rpm
Cyl. R1 R2 R3 R4
5 19600 14300 14550 10600
6 23520 17160 17460 12720
7 27440 20020 20370 14840
8 31360 22880 23280 16960
Cyl. Length A
mm		 Weight
tonnes
5 8085 481
6 9375 561
7 10665 642
8 11960 716

Dimensions
mm

B C D
4780 1575 10790
F1 F2 F3 G
13750 13750 12820 2455

Brake specific consumption (BSFC) IN g/kWh

Rating point R1 R2 R3 R4
BMEP, bar 21.0 15.3 21.0 15.3
BSFC (G/kWh) Delta Bypass Tuning, 100% power, Tier II 167.8 162.3 166.8 162.3
R1 BSFC (g/kWh), Tier II Power(%)
50 65 75 90 100
Delta Bypass Tuning 160.7 158.8 159.3 162.1 167.8
Low-load Tuning 157.2 155.3 159.3 162.5 168.8

Brake specific consumption (BSFC) IN g/kWh

Rating point R1 R2 R3 R4
BMEP, bar, 21.0 15.3 21.0 15.3
BSFC (G/kWh), Delta Bypass Tuning, 100% power, Tier II 167.8 162.3 166.8 162.3

R1 BSFC (g/kWh), Tier II

Power (%)
50 65 75 90 100
Delta Bypass Tuning 160.7 158.8 159.3 162.1 167.8
Low-load Tuning 157.2 155.3 159.3 162.5 168.8

iSCR available for 5-7 cylinder engines with one TC on exhaust side.

All data provided on this site is for information purposes only, explicitly non-binding and subject to changes without further notice.

Definitions Download

Engine documentation for X72-B


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t all began with Rudolf Diesel and the Sulzer Brothers

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Headquartered in Switzerland, powering merchant shipping since 1893

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