Lowara NSCF 300-450/3150/W45 VDC4 [16/348] Mechanical seal
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Lowara NSCF 300-450/3150/W45 VDC4 [16/348] Mechanical seal

Lowara NSCF 250-315/370/W45 VDC4 [16/348] Mechanical seal
• Do not use this pump to handle liquids containing
abrasive, solid, or fibrous substances.
•
Do not use the pump for flow rates beyond the
specified flow rates on the data plate.
Special applications
Contact the local sales and service representative in
the following cases:
•
If the density and/or viscosity value of the pump-
ed liquid exceeds the value of water, such as wa-
ter with glycol; as it may require a more powerful
motor.
• If the pumped liquid is chemically treated (for ex-
ample softened, deionized, demineralized etc.).
• Any situation that is different from the ones that is
described and relate to the nature of the liquid.
3.2 Pump denomination
See Figure 2 (page 318) for an explanation of the
denomination code for the pump and one example.
3.3 Nameplate
The nameplate is a metal label that is located on the
pump body or on drive lantern depending on model.
The name plate lists key product specifications. For
more information, see Figure 1 (page 313)
The nameplate provides information regarding the
impeller and casing material, the mechanical seal
and their materials. For more information, see Figure
3 (page 328).
IMQ or TUV or IRAM or other marks (for electric
pump only)
Unless otherwise specified, for products with a mark
of electrical-related safety approval, the approval re-
fers exclusively to the electrical pump.
3.4 Pump description
• Connection dimensions according EN 733 (mod-
els 32-125…-200; 40-125…-250; 50-125…-250;
65-125…-315;80-160…-315; 100-200…-400;
125-250…-400; 150-315…-400).
• Volute casing pump with back pull out power
end.
3.5 Material
The metallic parts of the pump that come in contact
with water are made of the following:
Material code Material cas-
ing / impeller
Standard/
Optional
CC Cast iron/Cast
iron
Standard
CB Cast iron/
Bronze
Standard
CS Cast iron/
Stainless steel
Standard
CN Cast iron/
Stainless steel
Standard
DC Ductil iron /
Cast iron
Standard
DB Ductil iron /
Bronze
Standard
Material code Material cas-
ing / impeller
Standard/
Optional
DN Ductil iron /
Stainless steel
Standard
NN Stainless steel /
Stainless steel
Standard
RR Duplex/Duplex Opzional
3.6 Mechanical seal
Unbalanced single mechanical seal acc. EN 12756,
version K.
3.7 Application limits
Maximum working pressure
Figure 4 (page
332) shows the maximum working
pressure depending on the pump model and the
temperature of the pumped liquid.
P
1max
+ P
max
≤ PN
P
1max
Maximum inlet pressure
P
max
Maximum pressure generated by the pump
PN Maximum operating pressure
Liquid temperature intervals
Figure 4 (page 332) shows the working temperature
ranges.
For special requirements, contact the Sales and
Service Department.
Maximum number of starts per hour
kW 0.25
-
3.00
4.00
-
7.50
11
-
15
18.5
22
30
-
37
45
-
75
90
-
160
Starts
per
hour
60 40 30 24 16 8 4
Noise level
For the sound pressure levels of pump equipped
with standard supplied motor
, see Table 7 (page
333).
4 Installation
Precautions
WARNING:
•
Observe accident prevention regula-
tions in force.
• Use suitable equipment and protec-
tion.
• Always refer to the local and/or na-
tional regulations, legislation, and co-
des in force regarding the selection of
the installation site, plumbing, and
power connections.
Electrical Hazard:
•
Make sure that all connections are
performed by qualified installation
en - Original instructions
16

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