Axially split between bearings pumps HPDM

Summary

Product identification

The HPDM is an axially split, between-bearings, single or multistage pump designed for transporting large volumes of liquid over long distances and high geodetic heights.

Main industries and applications include:

• Water and wastewater
• Hydrocarbon processing
• Oil and gas
• Power generation

Specific applications mentioned are:

• Water transport
• Desalination
• Transport of crude oil
• Any other high flow, high head application

Operating limits

Performance ranges (50 Hz and 60 Hz):

• Pump sizes: 250 to 1’600 mm (10 to 64 in.)
• Capacities: 1’000 to 20’000 m³/h (4’400 to 88’000 USgpm)
• Heads: up to 700 m (up to 2’300 ft.)
• Pressures: up to 175 bar (up to 2’500 psi)
• Temperatures: up to 150°C (up to 302°F)

Mechanical / hydraulic

Key features and benefits:

• Casing: Weight optimized by FEA; integrity and tightness ensured by gasket or o-ring split flange sealings.
• Hydraulics: Wide choice of proven hydraulics, high efficiency, and optimum suction performance.
• Bearings: Various options depending on operation conditions and load:
  • Anti-friction bearings (self-lubricated)
  • Sleeve-ball bearings (self-lubricated)
  • Sleeve / tilting-pad bearing (pressure lubricated or self-lubricated)
• Shaft seals: Mechanical seal is standard, gland packing is optional.
• Wear protection: Renewable casing wear rings and integral impeller wear rings; renewable impeller wear rings as option.

Impeller and stage configurations:

• Twin suction impellers on first stage and double suction, staggered vane second stage impeller: Assures low Net Positive Suction Head Required (NPSHR) and balance of axial thrust, low pressure pulsation. Diffusers on first stage and double volute on second stage to balance radial thrust.
• Double suction, staggered vane first stage impeller, single suction second stage impeller: Assures low NPSHR and low pressure pulsation. Double volute on both stages to balance radial thrust and enable high efficiency. Balance drum at Non-Driving End (NDE) to balance axial thrust and reduce pressure at the shaft seal. Compact cross-overs.
• Two stage construction with back-to-back single suction impellers: Cost effective and highly efficient for installations equipped with a booster pump. Back-to-back arrangement to balance axial thrust. Double volute to balance radial thrust and enable high efficiency. Compact cross-overs.

Materials

• Casing: Ductile iron, cast carbon steel, duplex, super duplex
• Impeller: Chrome steel, stainless steel, duplex, super duplex
• Shaft: Chrome steel, duplex, super duplex
• Stationary wear ring: Chrome steel, stainless steel, duplex, super duplex

Disclaimer

This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the official OEM PDF datasheet. Contractual data for any project must always match the specific OEM PDF revision used for that project.

Official datasheet (PDF)

Lenntech datasheet mirror