Pump Description; Mechanical Seal; Application Limits - Xylem Goulds NSCE Manual De Instalación

en - Original instructions
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 320) 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
The nameplate provides information regarding the
impeller and casing material, the mechanical seal
and their materials. For more information, see
3 (page 329).
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 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
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
NN Stainless steel /
Stainless steel
RR Duplex/Duplex

3.6 Mechanical seal

Unbalanced single mechanical seal acc. EN 12756,
version K.
16
(page 315)
Figure
Standard/
Optional
Standard
iron
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Optional

3.7 Application limits

Maximum working pressure
Figure 4 (page 334) 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 (page 334) shows the working temperature
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
Noise level
For the sound pressure levels of pump equipped
with standard supplied motor, see
335).
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
technicians and in compliance with
the regulations in force.
• Before starting work on the unit,
make sure that the unit and the con-
trol panel are isolated from the power
supply and cannot be energized. This
applies to the control circuit as well.
Grounding (earthing)
Electrical Hazard:
• Always connect the external protec-
tion conductor to ground (earth) ter-
18.5 30 45 90
- - -
22 37 75 160
24 16 8 4
Table 8 (page