C2-Sewage Pumps DN 32 to DN 600 - 2008.pdf

Sewage Pumps for Municipal and Industrial ApplicationsPlanning GuideSealing systemsEach motor is equipped with a sealing housing in which there is aseparate sealing chamber. This is between the fluid and the motorspace and is filled with white oil. This chamber accommodates theleakage of the sealing on the fluid side.The sealing can be done in different ways and depends on theselected motor.-Mechanical seal on the fluid side, special radial shaft seal on motorsideBasic sealing for normal applications- Two mechanical sealsFor high loads and difficult conditions for use- Block seal cartridgeMonitoring equipmentAll motors are equipped with bimetal or PTC temperature sensors.This prevents the motor from overheating.Optionally, PT100 sensors can be used for monitoring the bearingtemperature.Furthermore, the motors can be designed with a monitor for thesealed space which could detect leakage in the sealing chamber.Motors with a 2-chamber system are equipped with a separate leakagechamber. This is monitored by a float switch.HydraulicsThe nominal widths of the hydraulics range from DN 32 to DN 600.The housing and impeller are manufactured from grey or stainlesssteel cast iron. For especially high demands against corrosion andabrasion, these components can be coated with Ceram, a liquidceramic, or be manufactured from abrasite, a chilled cast iron material.The hydraulics are equipped with a gap and counter ring. Theseexchangeable wear parts protect especially vulnerable places, such asthe suction opening and impeller, and can be replaced inexpensively,as needed.Impeller formsThe impeller form is to be chosen depending on the application aswell as the composition of the fluid. The following impeller forms areavailable:Single-channel impeller• For the most part, insensitive to clogging• Wide ball passage• Low wear susceptibility• Gentle pumping• Power correction possible by trimming theimpeller• High degree of efficiency• For solid matter concentrations up to 8% TS,depending on the type of sludgeMulti-channel impeller• With 2, 3 or 4 channels• Low wear susceptibility• Gentle pumping• Power correction possible by trimming theimpeller• High degree of efficiencySubmersible Motor Pumps DN50 to DN 150Submersible Motor Pumps DN200 to DN 250Submersible Motor Pumps DN300 to DN 600NoneFor high wear and corrosion resistance, as well as high operating safetyNoneWilo Catalogue C2 – 50 Hz – Sewage Pumps DN 32 to DN 600141