Pump Design; Mechanical Seal; Application Limits - Xylem LOWARA e-MPA Manual De Instalación, Funcionamento Y Mantenimiento

en - Original instructions
The nameplate provides information regarding
the impeller and casing material, the
mechanical seal and their materials. For more
information, see Figure 2.
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 refers exclusively to the electrical pump.

3.4 Pump design


Suction casing: horizontal with axial and
radial flanges

Discharge casing: horizontal with radial
flanges

Impeller design closed with no axial thrust
balancing

Balancing drum at discharge side
incorporated in discharge casing

Motors – Design IEC
Standard: IE3 for Europe and NEMA

Flanges according to EN1092 / ISO 7005,
PN 10/16, 25, 40, 63 and 100. Optional
drilled flanges according to ASME B16.5;
Class 150, 300 and 600

Couplings: flexible without spacer as
standard. Optional with spacer (only for
horizontal pumps) on customer request

Coupling guard: totally enclosed and
position-adjustable
3.5 Material
The metallic parts of the pump that come in
contact with water are made of the following:
Material Code
Item
Impeller
Diffuser
Casing
Shaft
Shaft
sleeve
Relief
pipe
Plain bearing
18
Tungsten Carbide

3.6 Mechanical seal


Standard mechanical seal according to
EN12756

Cartridge seal

Soft packing

3.7 Application limits

Maximum working pressure
Figure 3 shows the maximum working pressure
depending on the pump model and the
temperature of the pumped liquid.
≤ PN
P + P
1max max
P Maximum inlet pressure
1max
P Maximum pressure generated by the
max
pump
PN Maximum operating pressure
Liquid temperature intervals
Figure 3 shows the working temperature ranges.
For special requirements, contact the sales and
service representative.
Maximum number of starts per hour
See Figure 18.
Noise level
For the sound pressure levels of pump equipped
with standard supplied motor, see
For sound pressure levels of pump without
motor, see Table 8.
4 Installation
Precautions
WARNING:
 Observe accident prevention
regulations in force.
 Use suitable equipment and
protection.
 Always refer to the local and/or
national regulations, legislation, and
codes 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
control panel are isolated from the
power supply and cannot be
energized. This applies to the
control circuit as well.
Table 7.