Thetys Pumps SRL
Tel: +40 744 595 445
Str. Teheran, nr. 11, sector 1,
011931 Bucuresti, Romania

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MSD-RO axially split multistage pump – Thetys Pumps
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MSD-RO axially split multistage pump

Thetys Pumps / Products  / Pumps  / Axially split pumps / MSD-RO axially split multistage pump

MSD-RO axially split multistage pump

Our high pressure solution for desalination applications

The MSD-RO is the result of Sulzer’s experience in supplying high pressure pumps for large SWRO plants worldwide, with a total of 2.5 million m3/d installed capacity. It is a two stage, split casing, single suction pump, mainly for high pressure membrane feed in SWRO desalination applications.

MSD-RO is a two stage in back-to-back arrangement, axially split casing, single suction pump which has been developed mainly for high pressure membrane feed in Reverse Osmosis (RO) desalination applications.

Innovation has been at the center of the MSD-RO development. As a result, the MSD-RO pump benefits from:

  • A significantly more compact arrangement of the pump hydraulics
  • Top class efficiency according to market needs

The meticulous design approach combined with Sulzer’s experience have resulted in a pump that performs to the highest efficiency level, whilst providing our customers with a robust, reliable, easy-to-maintain and cost-effective pump.

Main design features
  • Hydraulic configuration with two single suction impellers offers a compact design, with extremely low NPSH values and top of its class efficiency
  • Special opposed, dynamically balanced impeller design for ideal axial thrust balance, increasing the overall pump efficiency by avoiding the use of balancing line
  • Single, balanced, cartridge mechanical seal. Option for API 682 mechanical seal is available
  • Sleeve journal and duplex angular contact thrust bearing as standard. Sleeve journal and pivot shoe thrust bearing with force oil lubrication system is available
  • Robust split flanges based on heavy duty API standards
  • Reduced wear parts clearances by using PEEK or honeycomb, to increase pump efficiency.
Key characteristics

Up to 1,600 m3/h  /  7,000 US gpm


Up to 650 m  /  2,150 ft


Up to 90 bar  /  1,305 psi


Up to 60°C  /  140°F

Maximum speed of rotation

Up to 3,600 rpm

Performance range

Performance range 50 Hz

Performance Range 60 Hz

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