On average, only 10% of the mechanical seals reach their full life. For the remaining 90% there is a premature failure, mainly because of wrong exploitation, assembly or selection. Much better performances are achieved with the cartridge type mechanical seals. The cartridge is a compact unit which allows easy interchangeability and eliminates the potential for error in assembly. The construction of the cartridge is such that large axially movements allowed, and pressure is made possible with the use of hydraulic balancing at higher operating rates.
Construction: