Wilo-Sefa SA Advanced Sewage Pump for Pumping Untreated Sewage with
Faeces and Long-Fibre Components Standard Motor Monitoring Sewage
Pump for High Process Reliability and Durability
Your advantages Can be customized exactly to your requirements. For
reliable and efficient pumping of pre-cleaned sewage and untreated
sewage. Versatile. Constant, optimal pumping of different media via
various types of impeller. High process reliability thanks to motor
monitoring included as standard
Design Submersible sewage pump without cooling system for
continuous duty in stationary wet well installation. Application
Pumping of Untreated sewage with faeces and long-fibre components
(depending from impeller type) Sewage containing faeces Pre-cleaned
sewage without faeces and long-fibre components Process water
Wastewater Equipment/function Heavy-duty version made of grey cast
iron Surface cooling motor without ex approval Motor monitoring
devices: Winding temperature Moisture monitoring in the sealing
chamber and motor/terminal chamber Motor bearing temperature
Typekey NO VALUE Technical data Mains connection: 3~380 V, 50 Hz
Submerged operating mode: S1 Non-immersed operating mode: -
Protection class: IP68 Insulation class: F Fluid temperature: 3 ...
40 °C Free ball passage: 80 ... 150 mm Max. immersion depth: 20 m
Materials Pump housing: grey cast iron Impeller: grey cast iron
Static gaskets: Nitrile Fluid-side seal: Mechanical seal made of
SiC/SiC Motor-side seal: Mechanical seal made of SiC/SiC Motor
housing: grey cast iron Shaft: Steel
Construction Submersible sewage pump as submersible monobloc unit
for stationary wet well installation. Hydraulics Centrifugal
hydraulics with various impellers and connection on the pressure
side as a horizontal flange connection. The maximum possible dry
matter content is 8 %, depending on the hydraulics and impeller
type. The following impeller shapes are used: Vortex impeller (V)
Channel impeller (C) Multi-channel impeller (M) SOLID impeller,
closed (T) SOLID impeller, semi-open (G)
Motor Surfaced-cooled motors are used. The motor is cooled by the
surrounding fluid. The motor heat is transferred directly to the
fluid via the motor housing. The motor must operate in immersed
conditions. An operation of the motor in non-immersed operating
mode is not possible! The connection cable has bare (free) cable
ends. The standard length is 12 m or can be customer specific.
Monitoring devices Motor/terminal compartment monitoring – The
motor has internal moisture probes to detect water in the motor and
terminal compartment. Thermal motor monitoring – The thermal motor
monitoring protects the motor winding from overheating. PTC sensors
are used as standard. Sealing chamber monitoring – The motor has an
internal moisture probe to detect water in the sealing chamber.
Thermal motor bearing monitoring – The thermal motor bearing
monitoring protects the motor bearings from overheating. Pt100
sensors are used as standard.
Sealing The sealing of the motor compartment against the fluid is
realized by two independent mechanical shaft seals. The sealing
chamber between the mechanical shaft seals is filled with medical
white oil. Scope of delivery Submersible sewage pump with 12 m
connection cable Installation and operating instructions Options
Special voltages and 60 Hz on request Winding monitoring with Pt100
sensor Customized cable length VFD operation on request Accessories
Suspension unit Chains Fixation sets Switchgear and relays
Commissioning Operation with non-immersed motor Surface-cooled
motors are not suitable for non-immersed operation. In the case of
fluctuating fluid levels, the system should shut down automatically
as soon as the minimum water submersion is reached. Horizontal
installation Horizontal installation is not possible!
