Lowara e-NSC Series Montage-, Betriebs- Und Wartungshandbuch Seite 14

en - Translation of the original instructions
• 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/ Material
Optional code
Standard CC
14
.
Material EN733 Extension
casing/ range
impeller
32–125 to 125-500,
150-400 150-500 to
300-450
Cast iron / X
Cast Iron
Standard/
Optional
Standard
Standard
Standard
Standard
Standard
Standard
Optional
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 + P ≤ PN
1max max
P Maximum inlet pressure
1max
P Maximum pressure generated by the pump
max
PN Maximum operating pressure
Liquid temperature intervals
Version
Standard
Optional
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
Starts 60
range
per
hour
e-NSC Installation, Operation, and Maintenance Manual
Material Material EN733
code casing/ range
impeller
32–125 to
150-400
CB Cast Iron /
Bronze
CN Cast Iron /
Stainless
Steel
DC Ductil Iron /
Cast Iron
DB Ductil Iron /
Bronze
DN Ductil Iron /
Stainless
Steel
NN Stainless
Steel / Stain-
less Steel
RR Duplex / Du-
plex
.
Gasket Minimum
EPDM -20°C (-4°F)
FPM (FKM) -10°C (14°F)
4.00 - 11 - 22 30 - 37 45 - 75
7.50
40 25 16
Extension
range
125-500,
150-500 to
300-450
X
X
X
X
X
X
X X
Maximum
140°C (284°F)
90°C (194°F)
90 – 185 -
160 355
8 4 3