Unbalance Seals

Single Spring Unbalanced Mechanical Seal

Simple, single large-coil spring construction offering the most economical seal design in the component seal range
Non-clogging spring geometry that tolerates slurries, fibrous media, and mildly contaminated fluids well
Unbalanced face design keeps part count and manufacturing complexity to a minimum
Widely interchangeable across common pump models, making it a practical choice for stock replacement
Straightforward field installation with minimal setup precision required compared to balanced designs
Reliable general-purpose sealing for pumps operating within moderate pressure and temperature ranges
Cost-effective entry point for standard industrial, agricultural, and water-handling pump applications

PRODUCT DESCRIPTION

The Practical Choice for Everyday Pump Sealing

Installing a single spring unbalanced seal is about as simple as component seal fitment gets — the assembly slides onto the shaft, the single coil spring is compressed to its marked working length, and the stationary seat is set into the chamber before a final alignment check. Because it's an unbalanced design, there's less precision required in setup compared to balanced seals, which is part of why it remains a go-to choice for general maintenance and replacement work. It performs reliably in pumps handling water, mild chemicals, and slurries where pressures stay within moderate limits, and its wide interchangeability across common pump brands makes it a convenient option to keep in stock. For applications that don't push pressure or temperature extremes, this seal delivers dependable service at the lowest cost in the single-spring family. For complete step-by-step installation instructions and torque specifications, refer to our detailed installation guide on the blog.

TECHNICAL SPECIFICATIONS