High-pressure hydraulic systems require seals that can withstand extreme extrusion, friction, and heat. This comprehensive guide explores the best material options (PU, PTFE, PEEK) and seal profiles (U-Cups, Glyd Rings, Step Seals) to ensure reliable performance in demanding applications. Brought to you by Forever Seals.

Ordering custom seals or looking for OEM alternatives? Getting an accurate quotation fast requires the right information. This guide covers the essential data checklist—including dimensions, materials, and operating conditions—you need to provide to your seal manufacturer for a perfect match.

Tired of paying premium prices for OEM seals like Trelleborg, Parker, or Hallite? This comprehensive guide explores how purchasing managers and distributors can successfully transition to alternative seal manufacturers. Learn how to evaluate quality, verify materials, and reduce costs without compromising performance.

In the vast and complex machinery of modern civilization—from the deepest oil wells and the fastest semiconductor fabrication plants to the most advanced aerospace engines—there is a component that is rarely seen but absolutely critical to survival: the industrial seal. A seal is a deceptively simple device. Its primary function is to prevent the leakage of fluids or gases, and to keep contaminants out. However, the failure of a single, seemingly insignificant O-ring or oil seal can lead to catastrophic consequences: the grounding of an aircraft, the shutdown of a multi-billion-dollar refinery, or the total failure of a hydraulic system in heavy construction equipment.

In hydraulic and pneumatic systems, seals are subjected to high pressures, temperature fluctuations, and dynamic movement. While the primary sealing element—such as an O-ring or a lip seal—does the heavy lifting of preventing leakage, it often relies on a small but critical component to perform reliably: the backup ring.

Backup rings, also known as support rings or anti-extrusion rings, are installed alongside the primary seal to prevent it from being extruded into the clearance gap under pressure. Without them, many seals would fail prematurely, leading to leakage, downtime, and costly repairs. This article explains what backup rings are, how they work, the materials used, and how to select the right backup ring for your application.