REDwire Innovative seal design makes seal replacement a breeze

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KSB's new 4STQ cartridges are designed to offer easy installation and excellent pump protection.

KSB Pumps is proud to introduce a new family of modular cartridge-type mechanical seals optimized for use in wet- or dry-installed wastewater pumps. These new 4STQ cartridges feature an innovative design that offers easy installation and excellent pump protection.

Design details

The 4STQ is a double mechanical seal. Two seal stages are arranged in tandem and feature highly wear-resistant silicon carbide primary rings to ensure excellent protection for the pump’s bearings and motor.

KSB engineers designed 4STQ to be easy to install and remove. The modular design minimizes downtime during maintenance and prevents the seals from being installed incorrectly. The seal cartridge fits precisely into the installation space, ensuring accurate alignment with the pump’s shaft. This reduces wear and improves service lifetimes.

There is no need for assembly fixtures or fastening bolts, the company explains. An internal multi-spring arrangement enables the pre-loading for the primary sealing rings. These springs are located in an oil reservoir that protects them from contamination or corrosion due to water ingress. All metal components are manufactured from corrosion-resistant stainless steel, while FKM elastomers are used for the o-rings.

The new 4STQ modular seals are ideal for use with KSB’s Sewatec and Amarex wastewater pumps, and are suitable for the full range of operating conditions specified for these pumps.

A leading manufacturer

The innovative 4STQ seals come from the bright minds at KSB, one of the world’s largest manufacturers of pumps, valves and systems. They are available in Canada through KSB Canada, based in Mississauga, Ont. The company’s comprehensive product portfolio consists of more than 3,000 different off-the-shelf pumps and valves, as well as thousands of engineered and customized solutions.

KSB Canada specialize in providing reliable pump solutions for the most challenging applications in industrial and utility power plants, water and wastewater facilities, and mining and industrial processes. The company also offers full commissioning support, maintenance, repair and re-building services for pumps from KSB and other manufacturers.

To learn more, contact KSB Canada.


KSB Pumps Inc

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