Lip Seals for Pumps and Rotating Equipment
Send measurements, photos, or markings. We help identify and quote replacement lip seals for pumps and rotating equipment.
About Lip Seals
A lip seal uses a flexible sealing lip that rides on a shaft to keep lubricant in or contamination out. The lip material, case style, garter spring, and whether it is a single or double lip all affect how well it performs. If the fluid, temperature, shaft speed, or environment has changed since the equipment was new, a different lip material may be worth considering.
Measurement Key
Choosing the Right Material
Lip material should match the fluid being sealed, the temperature range, shaft speed, and the environment around the equipment.
- Buna N Nitrile: Common for oil, grease, and general-purpose industrial service.
- Viton FKM: Often better for higher heat, oils, fuels, harsher industrial environments, and chemical exposure.
- PTFE Lined: Often used for higher shaft speeds, chemical exposure, or lower-friction requirements.
- Silicone: May work in some temperature-sensitive applications. It may not be ideal for abrasive or high-wear service.
- Garter Spring: Helps maintain lip pressure against the shaft. This is often important for maintaining a consistent seal over time.
- Double Lip: Often a better choice when contamination from outside the equipment is a concern.
What Changes the Selection
- •Oil versus water versus chemical being sealed
- •Temperature, especially high heat or cold environments
- •Shaft speed and surface finish
- •Dust, dirt, or abrasive particles outside the seal
- •Washdown or outdoor exposure
- •Shaft wear from an existing seal
- •Whether the goal is keeping lubricant in or keeping contamination out
What Helps Us Quote It
ID, OD, and width measurements, lip style, spring type, case style, lip material, equipment type, the media being sealed, photos of the old seal, and any numbers or markings on the metal case or rubber all help.
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PumpSealsUSA helps maintenance teams, repair shops, municipalities, contractors, and industrial facilities across the United States identify and source replacement seals and pump parts.