English
Installation and maintenance instructions Wilo-Horizontal pumps
NP
G
When handling always wear gloves, safety boots
and an industrial safety helmet.
For masses above 25 kg (55 lb), manual handling
is forbidden.
2.4
Storage
Do not store pumps starting on the fan guard.
The pump may be stored as above for up to 6
months. Consult us for preservative actions when
a longer storage period is needed.
2.5
Recycling and end of product life
At the end of the service life of the product or its
parts, the relevant materials and parts should be
recycled or disposed of using an environmentally
acceptable method and local regulations. If the
product contains substances that are harmful to
the environment, these should be removed and
disposed of in accordance with current regulati-
ons. This also includes the liquids and or gases that
may be used in the "seal system" or other utilities.
Make sure that hazardous substances are dis-
posed of safely and that the correct personal
protective equipment is used. The safety speci-
fications must be in accordance with the current
regulations at all times.
3 Pump Description
3.1
Configurations
The centrifugal motor pump unit is designed for
the pumping of cold water or all clear liquids which
are not solid and liquid mixtures, corrosive, abra-
sive or explosive when in contact with the pump
motor unit and its working parts (Important: for
other liquids consult us for preliminary advice).
The NP
G
type pump is a single-stage pump with
axial suction, support under pump casing (Stan-
dard NF EN 733) and tangential vertical discharge.
The pumps of this range allow to the removal of
the pump rotor whilst leaving the pump casing
connected to the suction and discharge pipework.
The pump must be stored in a non-explosive,
ventilated location, sheltered from bad weather,
dust and vibrations.
The reliability of the delivered machine can only
be ensured if it is used according to the conditions
given in this manual. The maximum values speci-
fied in this manual must never be exceeded..
Bareshaft pump
Store the pump in a clean, dry location
away from vibration. Leave piping con-
nection covers in place to keep dirt and
other foreign material out of pump
casing. Turn pump at intervals to pre-
vent brinelling of the bearings and the
seal faces, if fitted, from sticking.
CAUTION!
Maximum working pressure at suc-
tion:
in the limit of the
maximum working
pressure at discharge
for zero flow accor-
ding to the pump
type
Maximum pumped fluid temperature
• Gland packing without cooling:
d
105 °C
• Mechanical seal without cooling:
• ACS version
d
80 °C
• Standard version
d
140 °C
Maximum solid suspension
50 g/m
3
Density
1
Viscosity
1
Frequency
50 Hz
Maximum speed
• for all pumps exept
1450 min
-1
• for NP
G
400-500, NP
G
400-650,
NP
G
500-500
990 min
-1
• for NP
G
65-315 , NP
G
100-315
2900 min
-1
