Reverse osmosis (RO) pumps work with seawater at high pressure. Some pump manufacturers choose to design their own seals or reduce the number of seals needed.
According to KSB's documentation, the 4HG seal is a single balanced, dynamic seal designed for the HGM-RO pump series in seawater applications, with a maximum fluid temperature of 220 degrees C. The shaft sleeve is integrated into the seal, with a multi-spring configuration for high durability. The modular design allows for installation without positioning tools or size adjustment, ensuring the correct clamping force.
According to Sulzer's introduction, the multi-stage MBN-RO pump has an integrated mechanical seal on the drive side (low-pressure side) and does not use a mechanical seal on the high-pressure side, making the pump more compact and reducing potential leakage points.
KSB, Sulzer. Parameters announced by the manufacturer. The article is compiled and reinterpreted by SNS-VN; brand names belong to their owners.