Yanmar 3JH4BE - Seawater Pump; Specifications of Seawater Pump

9. Cooling Water System
148
9.2 Seawater Pump
The seawater pump is driven by a gear. The two kinds of seawater pumps are prepared. The standard
one is mounted on the gear case and the other (optional) is mounted on the gear case flange.
9.2.1 Specifications of seawater pump
(1) Performance
(2) Durability (reference data)
Flow Min. 3800 L/h at
pin = -5 kPa (-0.05 bar)
pout = 95 kPa (0.95 bar)
n = 3250 min
-1
after 1500h duty
Self-priming ability Max. 10 s at
Suction head = 0.5 m
length of pipe = 0.6 m
n = 500 min
-1
Tightness test 400 kPa (4bar)
• Impeller
• Flow drop
Min. 1500 h
Max. 10% after 1000h
Leakage from seal
Lip seal, water
Lip seal, oil
Max. cm
3
/h
1000 h
3000 h
Cover, wear plate Min. 3000 h
Other parts Min. 6000 h
Seawater pump
(Option)
Pump drive gear
Gear case flange
Gear case
Pump drive gear
Gear case
Seawater pump