Applications ... Fairbanks Morse submersible dry-pit vortex solids-handling and sludge pumps have proven experience in pumping of solids, slurries, sludge, pulp, trash, sewage and grit. These pump are specifically designed to pass solids, sludge, grit, trash and long stringy materials.

Submersible dry-pit vortex solids-handling and sludge pumps can be found in sewage and raw water lift stations, many unattended, which require utmost reliability and freedom from clogging and resistance to wear or other downtime maintenance and specifically where there is a chance for station flooding. Plants demand pumps to provide sustained high performance, the best possible design to resist clogging, minimize wear, and minimum size driving motors and controls to reduce construction and operation costs. Sewage and wastewater treatment plants and industrial plants where solids handling and grit handling service is required are other typical installations.

The successful application of submersible dry-pit vortex solids-handling and sludge pumps requires the consideration of many elements. In addition to knowing the capacity and discharge head requirements, other factors which need to be evaluated include:

• Net Positive Suction Head Available (NPSHA) and submergence
• Maximum operating pressure
• Capacity operating range
• Horsepower required throughout the pump's operating range
• System head curve
• Sump requirements

Other considerations include:

• Parameters of the liquid being pumped
• Allowable solid size
• Elevation
• Driver requirements
• Material of construction

Features ... Parameters of submersible dry-pit vortex solids-handling and sludge pumps require the units to be available in configurations to meet user needs. Fairbanks Morse meets these demands by providing submersible vortex solids-handling and sludge pumps in 4" and 6" diameter discharge sizes. Pumps are secured to the sump floor with the suction and sicharge hard piped. The unit runs continuously nonsubmerged.

Impellers are semi-open statically balanced vortex design with repelling vanes on the back impeller shroud to reduce stuffing box pressure and balance axial loading. With the impeller recessed out of the fluid flow channel the design assures passage of large solids and long stringy materials. Conservative bearing ratings and oversized shafts are designed for low radial stress to reduce shaft deflection and ensure years of reliable, trouble-free service under any load during abnormal conditions.

Material of construction include cast iron or stainless steel volutes, impellers and wear plates, and stainless steel shaft. Shafts are sealed by two separate tandem mounted mechanical seals to protect the motor from the pumped liquid.

Submersible.dry-pit vortex soilds-handling and sludge pumps are driven by a UL Listed submersible motor with superior sealing features over other submersible motor designs to ensure a durable long life unit. In fact, Fairbanks Morse backs their submersible units with a five-year prorated warranty. These run-dry motors arewaterjacketedutilizingaportionoftheliquidbeingpumpedtocarryawaymotorheat. Aunique, self-cleaning rotating flow-control disc prevents virtually any solids from entering and accumulating in the mechanical seal area and cooling waterjacket. A still tube located in the cooling waterjacket allows air to escape as the cooling water enters.

Our special services ... at Fairbanks Morse we will design, research, test and manufacture submersible dry-pit vortex solids-handling and sludge pumps for special requirements. In many cases our standard pumps can be easily modified to meet these special requirements.

Our quality ... begins with total source control coupled with our investment in and commitment to highly specialized, computerized machinery. Fairbanks Morse manufactures submersible dry-pit vortex solids-handling and sludge pumps that must meet the exacting standard of our design engineers.

Our commitment ... at Fairbanks Morse is based on our longevity, distinctive products, market leadership, and customer service and is the direct result of the quality and dedication of our personnel. Our submersible dry-pit vortex solids-handling and sludge pumps are machined, built, and tested by our skilled shop personnel who average over 23 years of experience. Working as a team, our people continually explore new ways to better serve our customers. Product quality, dependability, and innovation are all part of the Fairbanks Morse commitment to excellence.

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