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ELECTRIC SUBMERSIBLE PUMPS CASED VERSION 6” (SERIES 140 PX) >The submersible pumps serie 140 PX are completely in Stainless Steel AISI 304 and are unique in the world for the impellers with front shim adjustement fully floating and released from one another. Thanks to a very important patented technologic innovatiob,the keeping of a stadium and the former is guaranteed by a PTFE ring attached to the impeller that moves on the Stainless Steel casing.By a virtue of the above, the axial thrust downward caused by the impeller is discharged on the intermediate casing keeping completely free the thrust bearing of the motor ,which works absolutely free of dangerous axial loads. A special bearing,movable radially placed on each diffuser compensates the non axiality linked to the system and can eliminate the last bearing bush. By consequence,the structure of the of the pump is compact, short, robust, highly functional and absolute reliability even in wells with significant quantities of sand containing water and chemically aggressive. MATERIALS >The materials of standard execution are: >Impeller and diffuser in Stainless Steel AISI 304 >Intermediate casing in Stainless Steel AISI 304 >External sleeve in Stainless Steel AISI 304 >Pump shaft in Stainless Steel AISI 420 >Delivery bowl and suction cage in Stainless Steel AISI 304 > Check valve in Stainless Steel AISI 304