Man L21 31 Marine Diesel Engine - China

L21/31

Bore: 210mm, Stroke: 310mm

Speed

mep r/min

bar 100

24.1

kW

6L21/31 1, 290

7L21/31 1, 505

8L21/31 1, 720

9L21/31 1, 935

Specific Fuel Oil Consumption(SFOC)to ISO conditions

MCR 100% 85%

L21/31 195g/kWh 189g/kWh

Specific lube oil consumption 0.8g/kWh

Dimensions

Cyl.

No.

6 7 8 9

L mm 4, 225 4, 580 4, 935 5, 290

L1 mm 3, 285 3, 640 3, 995 4, 350

H mm 3, 115 3, 115 3, 267 3, 267

W mm 1, 695 1, 695 1, 820 1, 820

Dry mass t 16.0 17.5 19.0 20.5

Minimum centreline distance for twim engine

installation: 2, 400mm

Main Data

Number of cylinder 6, 7, 8, 9

Rated power(MCR) kW/cyl 215

Rated speed rpm 1000

Idle speed rpm 600

Bore mm 210

Stroke mm 310

Stroke/bore ratio 1.5

Cylinder distance mm 355

Mean piston speed m/s 10.3

Mean eff.

Pressure(MEP) bar 24.1

Compression ratio 15.5

Displacement/cylinder L 10.7

Max.

combustion pressure bar 200

Fuel oil acceptance MGO, MDO, HFO

Injection viscosity cSt Max 14

Lubricating oil Grade SAE 40

ISO ambient conditions Tolerance 5%

Fuel oil with lower calorific value of 42700 kJ/kg

Without engine-driven pumps

Addition for engine-driven pumps

1.5%(3g/kWh)for lubricating oil pump

0.7%(1.4g/kWh)for each water pump

For guidance only

Company Contact:

• Posted By: QINHUANGDAO BEIFANG MARINE PARTS & MACHINERY IMP &

• Phone: 86-335-3212239

• Address: A03-A07, 11F., Jinyuan International Business Bld., Qinhuangdao , China

• Email:

• Website: https://www.bfmp.net/

• Business Description: QHD BeiFang Marine Parts& Machinery imp.
  
  & exp.
  
  Co., Ltd. Located in the
  
  beautiful coastal city Qinhuangdao.
  
  Founded on June 1990 composed
  
  of experienced and qualified diesel engine.
  
  Now the company has 103 of
  
  staffs and 41 technical personnel.
  
  Our main engine:
  
  Marine spare parts and material supply
  
  New ship building equipment contract service and ship rebuilding
  
  Diesel engine assembly parts and other marine equipment parts supply
  
  Power plant equipment supply
  
  Offshore oil equipment contract and service
  
  BFMP with many years of experience, and strong strength commit to the design and building of large and small power plant and also can provide pump station, and diesel engines, generator sets, auxiliary systems, electric systems for power plants.
  
  BFMP have successfully finished many contract projects of power plant and equipment supply, provides perfect after services for customers to make sure power plant running well.
  
  Joint with Diesel engine and generator set industries, can supply complete set of generator, spare parts and after sales serives according to users demand around the world.
  
  We can supply 40 7000KW, 50/60HZ, High/Medium/low pressure generator set , spare parts and consulting services.
  
  Our company have gained the authorization of many factories from home and abroad, and we can supply various models of engine components of the 2 Stroke and 4 Stroke engine.
  
  Until now, we have cooperated with many engine factories from domestic and overseas, which including the Korea STX DOOSAN, HYUNDAI, European HCP, and the domestic Henan Diesel Engine Industry Co., Ltd, Shaanxi Diesel Engine Heavy Industry Co., Ltd, Weichai Heavy Machinery Co., Ltd, ZGPT Diesel Heavy Industry Co., Ltd and Shanghai Qiyao Energy Co., Ltd etc.
  
  And we have developed cooperation relationships with these engine factories.
  
  Supply high quality parts including:
  
  Frame, Shaft, Cylinder head, Engine bearing;
  
  Crosshead, Cylinder Liner, Piston, Connecting rod;
  
  Water pump, Oil pump, Spacer;
  
  Whole set of engine components, such as tools and repair kit, etc.