Split Polymer Labyrinth Seal (SPLS)

Non-Contact Split Rotary Seal for Bearing Protection

The Chesterton patent‑pending Split Polymer Labyrinth Seal (SPLS) is a noncontact, split rotary seal for splash‑lubricated bearing protection in large pumps, gearboxes, and other rotating equipment. This split seal reduces installation time and outperforms conventional lip seals in operation.

Conventional lip seals have a high probability of fretting and wear on the shaft, which leads to reduced equipment life; the SPLS design reduces the chance of fretting and wear and helps increase bearing and gearbox life by extending the mean time between equipment repairs (MTBR).

This SPLS uses Chesterton’s exclusive, industry‑leading thermoset polymer to create a noncontact, three‑piece seal design that includes a rotor with an integrated valve, a stator, and a metal clamp with no wearing parts.

While in operation, centrifugal forces and gravity enable the lubricant to stay contained within the labyrinth and flow back into the bearing housing, while outside contaminants are excluded and redirected back to the atmosphere.

Chesterton’s advanced, durable, maintenance‑friendly thermoset polymers are compatible with common bearing and gear oils and offer a cost‑effective alternative to other material options. Each seal is custom manufactured to the exact equipment size needed to maximize performance.

Product Features

A split, non-contact design that reduces installation time and minimizes downtime for critical equipment
Reduces the chances of fretting caused by lip seals
Keeps lubrication in and seals out external contamination
Unitized design and durable material provide easy, reliable installation
Available in a variety of configurations to meet plant-wide equipment needs
Standard sizes available for popular equipment; custom sizes available upon request
IP65 protection against water jets and dust

Product Literature