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Seals for RO Pumps: KSB Design and How Sulzer Reduces Seal Count

Reverse Osmosis (RO) pumps work with sea water at high pressure. Some pump manufacturers choose to design their own for waste or reduce the amount of waste needed.

4HG by KSB

According to KSB documents, 4HG is a single-balanced, dynamic design, for the HGM-RO pump line in seawater applications, with a maximum liquid temperature of up to 220 degrees C. Axis protective pipe is integrated into the pipe, configuring multiple torches for high durability. Modular design allows installation without the need for a positioning tool or size adjustment, ensuring the correct pressure force.

Sulzer’s MBN-RO Pump

According to Sulzer's introductory documentation, the MBN-RO multi-layer pump has built-in mechanical debris on the drive side (low pressure side) and no mechanical debris on the high pressure side, helping to compact the pump and reduce the risk of leakage.

What people can use.

  • The slurry design attached to the pump design makes installation simple.
  • Reducing the number of drops is a way to reduce the risk of leaks.
  • When replacing the debris, it is recommended to prioritize the debris that is compatible with the size of the original debris chamber.

Source of reference.

KSB, Sulzer. Specifications published by the company. Articles compiled and reinterpreted by SNS-VN; brand name belongs to the owner.