Steyer Motors 4 Cylinders, Руководство по установке

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Z001007/0_4_September 2007 Page BILGE PUMPS-3
BILGE PUMPS INSTALLATION INSTRUCTION
12. BILGE PUMPES
12.1. GENERAL
To achieve max. Lenz power, pumps and piping are to be chosen as follows.
permanent pipe, copper tube 3/8", outside diameter
From the suction side of the pump a copper tube or reinforced rubber hose is to be laid towards the keel. Provide
the suction pipe at its lower end with a relief valve and a screen , the latter to permit easy cleaning. The relief
valve prevents a reflux of water of the permanent pipe in case of a damage on the pump wheel.
The bilge pump always should have constant water supply, to avoid dry operation. Connect the permanent pipe
at the delivery side of the pump. Board lead-in at the delivery side of the bilge pump should be at higher level as
the permanent pipe connection.
Equip the permanent pipe with a stop cock. This cock must be closed with inactive engine. Otherwise, sea water
may be pressed into the boat through the permanent pipe, passing the bilge pump, unless the suction pipe is
provided with an effective relief valve. At the lowest points of the pipes drain cocks are to be installed, so that
water can be drained in case of danger of frost.
To avoid pumping out of dirty water in the port or close to the beach, install a cock on the suction pipe of the bilge
pump. If drainage is not required, this cock should let pass the air onto the pum, thus preventing that water is
sucked in from the keel.
length of
boat
(m)
hand bilge pumps
volume flow
(m³/h)
power-driven
bilge pumps
(m³/h)
nominal width of bilge pipes
main bilge/branch bilge pipe
(mm)
< 8
< 10
< 15
< 20
< 24
3
5
5
6
6
5
6
7,5
9
10,5
32
32
40
50
60
40
40
ill.12/1