CDLC-12/4R Cartridge Mechanical Seals Shaft Size 12mm For Grundfos CNP CDL/CDLF Pumps

The CDLC-12/4R is a factory pre-assembled cartridge mechanical seal specially designed for CNP CDL and CDLF series vertical multistage pumps fitted with a 12 mm pump shaft. Built with a 4-hole circular flange, this seal adopts the industry-standard HQQE or HQQV material combination: silicon carbide versus silicon carbide (SiC/SiC) sliding faces paired with EPDM or FKM elastomeric components. Thanks to its robust material pairing and integrated cartridge construction, the seal delivers stable, leak-tight performance under varied operating conditions. It is well-suited for water treatment systems, water pressure boosting circuits, and light-duty chemical processing services. The pre-assembled cartridge design greatly simplifies on-site installation, eliminates complicated part alignment work, reduces assembly errors and downtime during pump maintenance. It offers dependable wear resistance and chemical compatibility, extending service life while lowering overall operational costs for vertical multistage pump systems in municipal water, industrial water supply and mild chemical transfer scenarios.