Technical data: TD/TAD420VE, TAD620VE, TAD650VE, TAD660VE
26
Group 20
Fuel feed pump
Fuel system figures are corresponding to the picture above.
1. Overpressure relief valve:
Opening pressure ................................................ 0.6
±0.05
MPa (87
±7
psi)
1)
2. Bypass valve:
Opening pressure ................................................ 50
±5
kPa (7.2
±0.7
psi)
Fuel flow:
Min fuel flow at 1500 rpm. ...................................... 600 l/hour (158.5 gal/hour)
Firing sequence
TD420VE/TAD420VE .......................................... 1-3-4-2
TAD620VE/TAD650VE/TAD660VE ..................... 1-5-3-6-2-4
Feed pressure ........................................................ 0.5 MPa (72.5 psi)
Feed pressure after fuel filter
At 1500 rpm: Min ................................................ 0.28 MPa (40.6 psi)
In
Out
Fuel specification
The fuel must be approved according to national and international standards for commercial fuels for example:
EN 590 (With environmental and sub-zero temperature specifications according to national requirements)
ASTM D 975 No 1-D and 2-D
JIS KK 2204
Sulfur content: According to current legislation in each country.
NOTE! Fuels with extremely low sulfur contents (ex City diesel in Sweden and Finland) can cause a drop in power
output of 5% and an increase in fuel consumption of 2–3%.
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