H7N Replacement Mechanical Seal

A High-Pressure Equivalent for Demanding Process Duty

Fitting the H7N equivalent seal follows the same balanced-seal procedure as the M7N, but for stepped shaft profiles — the rotating assembly is positioned against the shaft shoulder, the Super-Sinus spring is compressed to its marked working length, and the stationary seat is aligned squarely in the gland before final checks. What sets this seal apart is its pressure ceiling: on smaller shaft diameters it holds up to 80 bar, well beyond what most balanced component seals are rated for, which is why it turns up across boiler feed pumps, refining operations, and hot water or light hydrocarbon service. Its Super-Sinus spring geometry also gives it smoother, more even face loading across the full range of axial movement than a conventional coil. For complete step-by-step installation instructions and torque specifications, refer to our detailed installation guide on the blog.