Grundfos SE1 50 Instrucciones De Instalación Y Funcionamiento página 7

2.5 Operating conditions
The Grundfos SE1 and SEV pumps are suitable for the following
operating situations:
• Dry installation without separate motor cooling
arrangements.
• Submerged installation
S1 operation (continuous operation)
pH value
SE pumps in permanent installations can cope with the following
pH values:
Pump Material
Installation
type variant
1)
SE1/SEV Standard
2)
SEV Q
3)
SEV S
4)
SEV R
5)
SEV D
1)
Cast iron impeller, pump housing and motor top.
2)
Stainless steel impeller. Cast iron pump housing and motor
top.
3)
Stainless steel impeller and pump housing. Cast iron motor
top. Material variant S is available on request.
4)
Entire pump in stainless steel.
5)
Stainless steel pump according to EN 1.4517/1.4539.
Material variant D is available on request.
6)
For fluctuating pH values, the range is pH 4 to 14.
Liquid temperature
0 °C to +40 °C.
For short periods (maximum 1 hour) a temperature of up to 60 °C
is permissible (non-Ex versions only).
Warning
Explosion-proof pumps must never pump liquids of a
temperature higher than +40 °C.
Ambient temperature
Warning
For explosion-proof pumps, the ambient temperature
on the installation site must be in the range from -20
°C to +40 °C.
For explosion-proof pumps with WIO sensor, the
ambient temperature at the installation site must be
in the range from 0 °C to +40 °C.
pH value
Dry and
6)
6.5 to 14
submerged
Dry and
6)
6 to 14
submerged
6)
Submerged 5.5 to 14
Dry 1 to 14
Dry and
1 to 14
submerged
Dry and
0 to 14
submerged
Density and viscosity of pumped liquid
When pumping liquids with a density and/or a kinematic viscosity
higher than that of water, use motors with correspondingly higher
outputs.
Flow velocity
It is advisable to keep a minimum flow velocity to avoid
sedimentations in the piping system. Recommended flow
velocities:
- in vertical pipes: 1.0 m/s
- in horizontal pipes: 0.7 m/s
Maximum solids size
From 50 to 100 mm, depending on pump size.
Operating mode
Maximum 20 starts per hour.
S1, continuous operation. The pump can operate continuously
without having to be stopped for cooling.
3. Delivery and handling
The pump may be transported and stored in a vertical or
horizontal position. Make sure that it cannot roll or fall over.
3.1 Transportation
All lifting equipment must be rated for the purpose and checked
for damage before any attempts to lift the pump. The lifting
equipment rating must under no circumstances be exceeded.
The pump weight is stated on the pump nameplate.
The polyurethane-embedded plug prevents moisture from
penetrating into the motor via the motor cable.
Warning
Always lift the pump by its lifting bracket or by means
of a fork-lift truck if the pump is fixed on a pallet.
Never lift the pump by means of the motor cable or
the hose/pipe.
3.2 Storage
During long periods of storage, the pump must be protected
against moisture, heat and cold.
Storage temperature: -30 °C to +60 °C.
Warning
If the pumps are stored for more than one year or it
takes a long time before it is put into operation after
the installation, the impeller must be turned at least
once a month.
If the pump has been in use, the oil should be changed before
storage. See section 10.2.1 Oil
After a long period of storage, the pump should be inspected
before it is put into operation. Make sure that the impeller can
rotate freely. Pay special attention to the condition of the shaft
seal, O-rings, oil and the cable entry.
change.
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