RPH-HW

Summary

Product identification

The RPH-HW is a Hot Water Recirculation Pump designed for:

• Industrial plants
• Small to medium-sized power plants

Operating limits

• Max. flow rate:
  • 50 Hz: 1800 m³/h / 7925 US gpm
  • 60 Hz: 2170 m³/h / 9554 US gpm
• Max. head: 270 m / 886 ft
• Max. temperature: +320 °C / +608 °F
• Max. pressure: 110 bar / 1595 psi
• Nominal size: 25 – 300 mm / 1 – 12 in
• Other values are available on request.

Materials

• S6 (cast steel)
• C6 (12 % chrome steel)

Features

• Robust design for long service life and low maintenance costs:
  • Casing with centreline pump feet ensures reliable operation and correct alignment at high temperatures.
  • Volute casing with double volute (from DN 80) reduces radial forces and shaft deflection, reducing load on bearings and mechanical seals.
  • Robust and cost-effective component seal usable across a wide pressure and temperature range.
• Long service life and high level of reliability of bearings:
  • Oil lubrication with constant level oiler and labyrinth seal.
  • Angular contact ball bearings in triple arrangement, dimensioned for high inlet pressures and bearing life over 17,500 hours (L10h).
  • Optimised shaft and individual selection of balancing holes ensure reduced axial forces, low vibrations, and long service life of bearings and shaft seal.
• High system availability due to efficient cooling:
  • Intensive cooling of the seal chamber via replaceable high-efficiency cooling insert.
  • Additional cooling via tube-in-tube heat exchanger is possible if required.
  • Effective self-cooling of the bearing bracket through integrated cooling fins and optional fan impeller.
  • Bearing bracket with water cooling available on request.
• Ease of maintenance:
  • Back pull-out design and forcing screws allow for easy dismantling and maintenance.
  • Replaceable casing and impeller wear rings.
  • Constant level oiler ensures even lubrication of the bearings and makes it easy to check the oil level.
  • Modular design system reduces spare parts stock.

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

Official datasheet (PDF)

Lenntech datasheet mirror