Flowserve® N-Seal Nuclear Primary Pump Seal
The result of years of research, thousands of hours of rigorous testing and decades of primary pump application experience, the Flowserve N-Seal primary pump seal represents the nuclear industry’s most advanced mechanical seal technology. With each of three stages capable of sustaining 100% system pressure, the N-Seal has successfully provided proven service life and fail-safe redundancy in Flowserve Byron Jackson® primary coolant pumps for years.
... Read more Read less- Cartridge construction simplifies installation, improves seal setting accuracy and helps reduce associated costs
- Triple-redundant design mirrors existing seal system parameters, with each stage capable of handling 100% system pressure
- Hydrodynamic seal face technology delivers greater reliability and longer operating periods than hydrostatic designs
- Multiple seal face lift designs support non-contacting faces across a broad operating range
- Automatic pressure redistribution after a stage failure supports fuel-cycle completion, while interchangeable stage components help reduce spare parts inventory costs
ASME Section III, Class I
- Discharge pressures to 170 bar (2500 psi)
- Temperatures to 300°C (580°F)
- Speeds to 1800 rpm
Size Range: 6" to 9.62" shaft size
Nuclear Seal





















