Material and Compatibility Terminology

Lubrication system documentation frequently references materials used in seals, hoses, coatings, and components. This page defines compatibility terminology used in technical literature.

Terms describe observed material behaviour under defined conditions.

Elastomer
Flexible polymer material used in seals and hoses.

NBR
Nitrile rubber.

FKM
Fluoroelastomer.

PTFE
Fluoropolymer used for low friction sealing.

PU
Polyurethane.

Seal swell
Dimensional change of an elastomer after fluid exposure.

Hardness change
Change in material hardness following exposure to fluid or temperature.

Prepared by the Sinopec Online Technical Team.

Glossary and reference

Definitions and reference material used across lubricant documentation, including abbreviations, standards terminology, test method references, and classification systems. These pages support consistent interpretation of specifications and data sheets.

Technical Transition Guides

Equipment and industry focused technical summaries covering common operating conditions, lubricant functions, and specification considerations used when reviewing or comparing existing lubricants.

Last reviewed: January 2026