Xylem e-NSC, e-NSCF, e-NSCC - Manual (Page 14)

• Hazardous locations (such as explosive, or corrosive atmos-
pheres).
• Location where the air temperature is very high or there is poor
ventilation.
• Outdoor installations where there is no protection against rain or
freezing temperatures.
DANGER:
Do not use this pump to handle flammable and/or explosive
liquids.
NOTICE:
• 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 cas-
es:
• If the density and/or viscosity value of the pumped liquid exceeds
the value of water, such as water with glycol; as it may require a
more powerful motor.
• If the pumped liquid is chemically treated (for example 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 description
See Figure 9 for an explanation of the description code for the pump
and one example.
3.3 Nameplate
The nameplate is a metal label that is located on the bearing bracket.
The name plate lists key product specifications. For more information,
see Figure 10 and Figure 11 .
The nameplate provides information regarding the impeller and casing
material, the mechanical seal and their materials. For more informa-
tion, see Figure 12 .
IMQ or TUV or IRAM or other marks (for electric pump only)
Unless otherwise specified, for products with a mark of electrical-relat-
ed safety approval, the approval refers exclusively to the electrical
pump.
3.4 Design structure
• Dimensions according EN 733 and additional not standardized
extension sizes
• Volute casing pump with back pull out bearing bracket or stub
shaft connection
• Single stage
• For horizontal assembly
Part Description
Casing • Radial split volute casing with radial discharge
• Replaceable wear ring
Impeller • Closed radial impeller with wear rings on both
sides
Shaft seal • Single mechanical seal acc. EN 12756
• Optional cartridge mechanical seal
Bearings • Radial ball bearings
• Grease lubrication
• Optional: oil lubrication (Advanced bearing
bracket)
See the sectional drawing Figure 13 .
3.5 Material
The metallic parts of the pump that come in contact with water are
made of the following:
Standard/
Optional
Material
code
Material
casing/
impeller
EN733
range
32–125 to
150-400
Extension
range
125-500,
150-500 to
300-450
Standard CC Cast iron /
Cast Iron
X
Standard/
Optional
Material
code
Material
casing/
impeller
EN733
range
32–125 to
150-400
Extension
range
125-500,
150-500 to
300-450
Standard CB Cast Iron /
Bronze
X
Standard CN Cast Iron /
Stainless
Steel
X
Standard DC Ductil Iron /
Cast Iron
X
Standard DB Ductil Iron /
Bronze
X
Standard DN Ductil Iron /
Stainless
Steel
X
Standard NN Stainless
Steel / Stain-
less Steel
X
Optional RR Duplex / Du-
plex
X X
3.6 Mechanical seal
Unbalanced single mechanical seal acc. EN 12756, version K Dimen-
sions. See Table 14 .
3.7 Application limits
Maximum working pressure
This flow chart 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
Version Gasket Minimum Maximum
Standard EPDM -20°C (-4°F) 140°C (284°F)
Optional FPM (FKM) -10°C (14°F) 90°C (194°F)
For special requirements, contact the Sales and Service Department.
Maximum number of starts per hour
This table shows the number of starts allowed per hour for motors sup-
plied by Lowara:
kW 0.25 -
3.00
4.00 -
7.50
11 - 22 30 - 37 45 - 75 90 –
160
185 -
355
Starts
per
hour
60 40 25 16 8 4 3
en - Translation of the original instructions
14 e-NSC Installation, Operation, and Maintenance Manual