Pump Description - Xylem Goulds NSC Manual De Instalación, Funcionamento Y Mantenimiento

en - Original instructions
• 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 on page 365 for an explanation of the
denomination code for the pump and one example.
3.3 Nameplate
The nameplate is located on the bearing bracket.
The name plate lists key product specifications. For
more information, see Figure 1
The nameplate provides information regarding the
impeller and casing material, the mechanical seal
and their materials. For more information, see
3 on page 377.
IMQ 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 bearing
bracket.
3.5 Material
The metallic parts of the pump that come in contact
with liquid are made of the following:
Material code Material cas-
ing / impeller
CC Cast iron/Cast
CB Cast iron/
Bronze
CS Cast iron/
Stainless steel
CN Cast iron/
Stainless steel
DC Ductil iron /
Cast iron
DB Ductil iron /
Bronze
DN Ductil iron /
Stainless steel
18
on page 359.
Figure
Standard/
Optional
Standard
iron
Standard
Standard
Standard
Standard
Standard
Standard
Material code Material cas-
ing / impeller
NN Stainless steel /
Stainless steel
RR Duplex/Duplex
3.6 Mechanical seal
Unbalanced single mechanical seal acc. EN 12756,
version K.
3.7 Application limits
Maximum working pressure
Figure 4 on page 381 shows the maximum working
pressure depending on the pump model and the
temperature of the pumped liquid.
P + P ≤ PN
1max max
P Maximum inlet pressure
1max
P Maximum pressure generated by the pump
max
PN Maximum operating pressure
Liquid temperature intervals
Figure 4 on page 381 shows the working tempera-
ture ranges.
For special requirements, contact the sales and
service representative.
Maximum number of starts per hour
kW 0.25 4.00 11
- - -
3.00 7.50 15
Starts 60 40 30
per
hour
NOTICE:
If you use a different motor from the standard one
supplied with the electric-pump, check the relevant
instructions to find out the permitted number of starts
per hour.
Noise level
For the sound pressure levels of pump equipped
with standard supplied motor, see
382.
For sound pressure levels of pump without motor,
see Table 10 on page 386.
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
Standard/
Optional
Standard
Optional
18.5 30 45 90
- - -
22 37 75 160
24 16 8 4
Table 9 on page