Unbalance Seals

Wave Spring Unbalanced Mechanical Seal

Undulating wave-form spring reduces axial length compared to conventional coil spring designs
Unbalanced face construction keeps the design simple and economical for standard-duty service
Low-profile spring geometry suits pumps with restricted seal chamber depth
Even, uniform closing force across the wave coils reduces face flutter at moderate speeds
Reduced spring surface area limits solids entrapment compared to tightly wound coil springs
Compact single-spring assembly simplifies installation on standard pump shafts
Cost-effective option for OEM and retrofit pumps where chamber space is limited but pressure demands are modest

PRODUCT DESCRIPTION

A Space-Saving Seal for Standard-Duty Pump Applications

Fitting a wave spring unbalanced seal follows the usual spring-seal process — the rotating assembly is slid onto the shaft, the wave-form spring is compressed to its specified working length, and the stationary seat is aligned squarely in the chamber before final tightening. What makes this design useful is its shorter axial footprint: the flattened wave spring takes up noticeably less space than a standard coil, which matters in compact pump housings and OEM equipment with tight tolerances. Since it's unbalanced rather than a balanced face design, it's best matched to pumps running at moderate pressures where the added cost and complexity of a balanced seal isn't justified. It remains a practical, budget-friendly choice for general industrial and utility pump service where space is the limiting factor rather than pressure. For complete step-by-step installation instructions and torque specifications, refer to our detailed installation guide on the blog.

TECHNICAL SPECIFICATIONS