This need presented no problems for deep well pumps, oil rigs and outdoor installations, where corrosion resistant metal and rigid coupling mechanisms could be used. But as the demand grew for non-metallic vertical pumps for sumps greater than 20 feet, problems arose with isolating the stainless steel or high alloy shaft from the chemicals being handled. The answer has been found with a unique coupling device that permits the use of short plastic sleeved shaft segments, totally avoiding metal contact with the pumped fluid. This also simplifies shipping and facilitates installation even in plant areas with low headroom. Sumps as deep as 50 feet can now be accommodated.
Multistage pumps for higher flows, higher pressures and multiple functions.
Multistage thermoplastic vertical pumps can now simultaneously perform a variety of operations that previously required the use of two or more pumps. In addition to increasing flow and discharge pressures, they are available for servicing multiple processes from a single pump. They can perform different operations at separate stages. They can pump and screen fluids with solids or stringy material, and discharge the clean and debris-laden fluids to separate destinations. They can also be customized to provide continuous agitation of fluids with debris that tends to settle.