PRINCIPAL OF OPERATION
MALHAR submersible pumps are vertical , multi stage, centrifugal pumps with motor at the bottom & pump at the top. The water enters at the bottom of the pump and flows upwards through many stages.
The stainless steel bronze impellers rotate inside the diffusers with inherent guide vanes. The diffusers direct water leaving each impeller towards suction opening of the next impeller, Such a flow through each stage of impeller and diffuser combination adds pressure at each stage and finally water under high pressure is discharged through outlet at the top.
Motors are wet-type, water lubricated,water cooled rewindable squirrel cage induction
asynchronous type capable of with standing wide voltage fluctuations. Specially designed tilting pad thrust bearings can with stand axial thrust loads with negligible wear. The stator is wound with water proof synthetic film insulated winding wires. Spring loaded seal rings , grommets & sand guard prevent ingress of water in to the motor. An elastic diaphragam compensates for variations in pressure of cooling water as it gets heated during functioning.
The supply cables are protected by special Stainless Steel guards along the full length of the pump.
MALHAR Submersible Pumps are manufactured as per IS 8034 : 1989 with strict quality control for years of efficiency and reliable peration. Special design of the winding ensures efficient operation even high head and low voltages. MALHAR pumps are available in both Radial & Mixed flow. The pump is multistage of superior hydraulic design for maximum performance and operating efficiency. The bowls are made of Close Grained Cast iron for greater abrasion resistance. The impellers are of high quality graded bronze , dynamically balanced for best results. The Stainless Steel Shaft is ground to close tolerances and guided by water lubricated gun metal bearings, provided in each bowl of impeller casing. Hydrostatic tests are conducted on each pump to ensure maximum discharge at selected heads variable voltage conditions. A Stainless Steel coupling is provided to couple the motor and pump.