Both investment and lifecycle expenditures are taken into consideration when constructing the best possible pump, as an enhanced hydraulic design guarantees maximum effectiveness.

M-series pumps have a modular design, allowing Sulzer to find the most efficient solution to meet customer requirements.

Main benefits

  • Modular hydraulics for high efficiency in a wide range of operating conditions
  • Centreline mounted with large branch sizes for optimised inlet flow, low noise level and higher allowable forces and moments
  • Unaffected by rapid temperature variations
  • Stiff shaft design for critical speeds above the maximum operating speed
  • Multiple screws mechanical tensioners are used on large sizes to allow simpler tightening and loosening

Main applications

  • Main boiler feed in captive, independent, combined cycle, concentrated solar, biomass, and industrial power plants
  • Start-up boiler feed in utility thermal power plants
  • High-pressure water in general industry

Main design features

  • Up to four impeller sets per pump size
  • Optimal hydraulic selection to meet exactly the operating data and low net positive suction head required (NPSHr)
  • Double suction first-stage impeller available for selected pump sizes
  • Balance drum and axial thrust bearing designed for long life under extreme operating conditions is standard
  • Balance disc is optional
  • Permanent magnetic lift-off device is available for frequent start-stop operation
  • Paired, fan-cooled taper roller thrust bearings are standard for balance drum configuration
  • Optional sleeve radial bearings and double acting tilting pad with forced lubrication

Key characteristics

Capacities: Up to 1,000m3/h / 4,400 US gpm

Heads: Up to 2,400m / 8,200ft

Suction pressures: Up to 50bar / 725psi

Discharge pressures: Up to 350bar / 5,080psi

Temperatures: Up to 210 °C / 410 °F

Discharge sizes: Up to 200mm / 8in

Maximum speed of rotation: Up to 4,000rpm