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Self priming centrifugal pumps available at Hydro Innovations

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article image Self priming centrifugal pumps available at Hydro Innovations
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Roto-Prime self-priming centrifugal pumps, available from Hydro Innovations are specifically designed for pumping petroleum products, petrochemicals and solvents. The Roto-Prime centrifugal design incorporates a variable capacity vane pump which quickly and automatically evacuates air and vapor, making them ideal for loading, off-loading transports and stripping hoses. These self priming centrifugal pump provides automatic , positive pumping.  Whenever air or vapor is present at the start of the pumping operation – or when there is a loss of suction because of air or vapor during pumping – the priming pump automatically moves air and vapour from the suction line to discharge line.

One of the key features of the self-priming centrifugal pumps is the full priming feature. With air or vapor in the lines, pressure of the spring on top of the movable slide holds the priming pump in full pumping position. As the pump evacuates air and vapor from the lines, liquid pressure builds up on the underside of this slide, moving it upward toward neutral. When air and vapor are removed, liquid pressure equalizes spring pressure and the pump automatically slides into neutral… where it remains until air and vapor again appear in the system.

Specifications of the self-priming centrifugal pumps include:

  • The self-priming centrifugal pumps have rugged ductile iron or cast steel housings, heavy-duty steel or stainless steel shafts, fluorocarbon fitted mechanical shaft seal with aluminum impellers
  • Sizes of the centrifugal pumps range from 3" x 2" (76.2mm x 50.8mm) up to 6" x 5" (152.4mm x 127mm), capacities to 1450 gpm (91.3lps), heads to 390 feet (118.9m)
  • The single volute (RS) pumps operates at 1750 rpm, with the double volute (RD) pump operating at 3450 rpm
  • Optional accessories for the self-priming centrifugal pumps include stainless steel pump shafts, bronze impellers, companion flanges, swing check valves and mechanical seals
Roto-Prime self-priming centrifugal pumps are actually two pumps in one. The small powerful vane-type pump within the main centrifugal housing can prime an absolutely dry 4 inch (102mm) line with zero back pressure in approximately two seconds per foot without initial manual priming. And, this priming pump will evacuate suction lines against back pressures up to 8 pounds per square inch.

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