Product Guide

Product data
SQFlex
1
5
Applications
Being designed for continuous as well as intermittent
operation, the SQFlex system is especially suitable for
water supply applications in remote locations, such as
• villages, schools, hospitals, single-family houses,
etc.
•farms
– watering of cattle
– irrigation of fields and greenhouses
• game parks and game farms
– watering applications
• conservation areas
– surface water pumping
– floating pump installations for pumping of water
from ponds and lakes.
Pumped liquids
SQF pumps are applicable in thin, clean,
non-aggressive, non-explosive liquids, not containing
solid or long-fibered particles larger than sand grains.
pH value: 5 to 9.
Liquid temperature: +32 °F to +104 °F (0 °C to +40 °C)
The pump can run at free convection (~ 0 ft/s) at
maximum 104 °F (+40 °C).
Sand content
Maximum sand content: 50 ppm.
A higher sand content will reduce the pump life
considerably due to wear.
Salt content (chloride ions CI
-
)
The table below shows the resistance of stainless steel
to Cl
-
. The figures in the table are based on a pumped
liquid with a pH value of 5 to 9.
Features and benefits
Dry-running protection
The SQF pump is protected against dry running in
order to prevent damage to the pump. The dry-running
protection is activated by a water level electrode
placed on the motor cable 12-24 in. (.3 to .6 m) above
the pump, depending on pump type.
The water level electrode measures the contact
resistance to the motor sleeve through the water.
When the water level falls below the water level
electrode, the pump will be cut out. The pump will
automatically cut in again 5 minutes after the water
level is above the water level electrode.
Fig. 4 Vertical installation
Fig. 5 Horizontal installation
High efficiency
The MSF 3 motor is a permanent-magnet motor
(PM motor) featuring a higher efficiency within the
power range compared to a conventional
asynchronous motor.
In addition to this, the segmented motor stator
contributes considerably to the high efficiency.
The MSF 3 motor is furthermore characterized by a
high locked-rotor torque even at low power supply.
Stainless steel
AISI
Cl
-
content
[ppm]
Liquid temperature
[°F (°C)]
304
0-300 < 104 (40)
300-500 < 86 (30)
TM02 2436 3901TM02 2435 3901
12-24 in. (.3 to .6 m)
12-24 in. (.3 to .6 m)