MP 1, SQE-NE, SPA-NE, SP-NE - SCL Water

Submersible pumpsSubmersible pumpsSP EnvironmentalFeatures and benefitsBearings with sand channelsAll bearings are lubricated by the pumped liquid. Thechannels formed by the internal square along the shaftallow sand to be carried away by the pumped liquid.TM00 7301 1096Inlet strainerThe inlet strainer prevents entry of particles over acertain size.Fig. 32 BearingTM00 7302 1096Priming discThe Grundfos SPA-NE, SP-NE pumps are fitted with apriming disc. That prevents dry running as the primingdisc ensures lubrication of pump bearings duringoperation. The priming disc for the SPA-NE pump isshown to the right.Fig. 33 Inlet strainerHowever, if the water table is lowered to a level belowthe pump inlet, neither pump nor motor will be protectedagainst dry running.Protection against upthrustThe stop ring prevents damage to the pump duringtransportation and in case of up-thrust in connectionwith start-up.Designed as a thrust bearing, the stop ring limits axialmovement of the pump shaft.ServiceThe modular pump and motor design facilitatesinstallation and service. The cable with plug is fitted tothe motor with a nut which facilitates replacement.Only pumps that can be certified as uncontaminated,i.e. pumps containing no hazardous and/or toxicmaterial, may be returned to Grundfos for servicing.To prevent injury to the health of persons involved andto the environment, a document certifying that thepump is clean is required.Grundfos must receive this certificate before theproduct. Otherwise Grundfos will refuse to accept theproduct for servicing. Possible costs of returning theproduct are paid by the customer.Fig. 34 priming discTM01 9543 210047