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!
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