Unbalance Seals

Unbalanced Multi Spring Mechanical Seal

Multiple small springs distributed around the seal provide even, uniform closing force across the face
Unbalanced construction keeps design simple and manufacturing cost lower than balanced multi-spring variants
Stable performance at higher shaft speeds compared to single-spring unbalanced designs
Compact axial length suited to pumps with limited seal chamber space
Consistent face loading maintained even under minor shaft runout or misalignment
Best suited to clean to moderately clean fluids where narrow spring gaps won’t collect solids
Reliable bi-directional rotation capability, useful across varied pump configurations

PRODUCT DESCRIPTION

Steady Sealing Force for Standard-Speed Pump Applications

Fitting a multi spring unbalanced seal follows the standard spring-seal process — the rotating assembly is positioned on the shaft, the spring set is compressed evenly to the specified working length, and the stationary seat is aligned squarely in the chamber before final tightening. Getting uniform compression across all the springs matters here, since uneven loading can create hot spots on the face over time. This design holds its sealing force well at higher rotational speeds than a single-spring equivalent, and its shorter axial length makes it a good fit for pumps with tighter chamber dimensions. It performs best with clean or lightly loaded fluids, since the narrow gaps between the springs can trap fine solids in dirtier services. For complete step-by-step installation instructions and torque specifications, refer to our detailed installation guide on the blog.

TECHNICAL SPECIFICATIONS