Cartridge Mechanical Seals

Mechanical Seals for any application

We offer a range of standard inventory cartridge mechanical seals, including single and double seals to suit even the most demanding application and thanks to our modular design system we offer them with the best on-time delivery performance in the industry.

For unusual applications our Standard Plus seal range offers all the benefits of a standard seal while meeting our customer’s specific needs. This covers competitor replacement seals, seals designed for specific pumps and seals designed for pumping specific processes. 

Proven Design - Cartridge Construction

Cartridge mechanical seal construction is a proven reliability improvement. The seals are pre-assembled at the factory, pressure tested and shipped as a unit, leading to improved performance as errors due to incorrect installation are reduced. Cartridge construction eliminates the need to measure and set spring compression, and having a mechanical seal pre-assembled means that the seal faces are protected from damage during installation.

Cartridge seal range

For more information about seal types, and the advantages of seals over gland packing, see our Seal Technology Training Video


Use the navigation menu to filter through the product range, or take a look at some of our featured products below.


For a quick view of all products, use the >  Product index

BDFI - Bellows Double Flow Induction Seal


Bellows Double Flow Induction / Convection

The BDFI™/BDFC™ (Bellows Double Flow Induction/Convection) is an innovative modular hybrid design, created using the inboard design of a BQFD™ and the outboard design of a DMSF™.

BDTP - Bellows Double Seal


Bellows Double Seal

The BDTP™ (Bellows Double Tandem Pumping) is a highly-innovative hybrid design, modular to the BDFI™. The seal's directed barrier fluid flow path achieves optimum heat removal at both sets of seal faces.

BQFD - Bellows Single Cartridge Seal


Bellows Single Cartridge Seal

The BQFD™ (Bellows Quench Flush Drain) range of single cartridge mechanical seals uses many of the same modular parts as a BSIV™

BSAI - Bellows Component Seals


Bellows Component Seals

The BSAI™ range is available in a wide range of seal face and elastomer combinations, together with self-aligning, DIN, CURC™, T, L shaped or boot mounted stationaries.

Bellows Single Full Graphite Cartridge Seal


Bellows Single Full Graphite Cartridge Seal

The BSFG™ (Bellows Single Full Graphite) cartridge seal is specifically designed to eliminate the costly and often long lead-time issues of exotic elastomer compounds.

BSIV - Single Bellow Seal


Single Bellows

The BSIV™ range of single cartridge mechanical seals has been designed as a value-for-money, high-performance sealing solution for general applications.

CDFI & CDFC - Double Mechanical Seal


Double Mechanical Seal

The CDFI™ / CDFC™ bridges the product range gap between the CDSA™ and DMSF™ differentiating itself in two areas.