PNW

Summary

Product identification

The PNW and SNW are vertical tubular casing pumps.

Applications:

• Irrigation and drainage
• Storm water handling in storm water pumping stations
• Raw and clean water transport in waterworks
• Cooling water handling in power stations and industrial plants
• Industrial water supply
• Docks, locks and sluices

Operating limits

• Max. capacity:
  • PNW: 2.5 m³/s (39,600 gpm)
  • SNW: 2.4 m³/s (38,000 gpm)
• Max. discharge head:
  • PNW: 10 m (33 ft)
  • SNW: 50 m (164 ft)
• Max. fluid temperature: 60 °C (140 °F)
• Max. speed: 1,450 rpm

Mechanical / hydraulic

Materials:

• Bellmouth: Cast Iron
• Diffuser element: Cast Iron
• Discharge elbow: Cast Iron
• Riser: Steel
• Motor stool: Steel
• Shaft: Steel / Stainless steel
• Impeller (SNW): Bronze / Stainless steel
• Propeller (PNW): Al bronze
• Other materials upon request.

Key Features:

• Easy installation: The locating surface in the motor stool simplifies motor mounting and removes the requirement for alignment.
• Reliable and hard-wearing: The sleeve coupling is bi-rotational. Being fully encapsulated, the coupling offers high corrosion resistance and reliable operation.
• Low maintenance costs: Short shaft overhang makes for minimum shaft deflection and minimum bearing loads.
• High operating reliability at low operating costs:
  • The maintenance-free and wear-resistant RESIDUR® bearing operates without external cooling and lubrication facilities, thus eliminating cost of periphery equipment.
  • Temporary dry-running during pump start-up is permitted, without damaging the pump.
  • The pump’s chemical and physical resistance makes it suitable for virtually any fluid (incl. solids-laden fluids).
• Constant efficiencies: Thanks to its corrosion and abrasion resistant materials, the pump maintains its optimum efficiency.
• Low maintenance (PNW only): The special "Ever-Clean-Blade" protection of the hydraulic system prevents clogging of the propeller blades from fibers in the fluid.

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Disclaimer: This summary is based on extracted text and may miss figures, footnotes, or revisions present in the full OEM PDF. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror