Seal for waste water pumps minimises downtime during maintenance

Seal for waste water pumps minimises downtime during maintenance

KSB has developed a new double mechanical seal for dry-installed and wet-installed waste water pumps. Assembly fixtures and fastening bolts are not required, and the The 4STQ seal’s modular design minimises downtime during maintenance inspections as well as preventing faulty reassembly, says the company.

A multi-spring arrangement provides required pre-loading for the primary rings themselves. The multiple springs are located outside the fluid handled in the oil reservoir so that the individual springs are protected from contamination. As the seal installation space and the mechanical seal are optimally matched, the seal faces are exposed to minimal wear and the sealing elements offer long service lives, says KSB.

The primary rings are made of silicon carbide as standard, with tungsten carbide also available on option. All metal components are manufactured from corrosion-resistant stainless steels such as 1.4122 or 1.4571. FKM elastomers are used for the O-rings.


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