Hydraulic cylinders are the workhorses of modern industry, powering everything from excavators and cranes to injection molding machines and aircraft landing gear. At the heart of every reliable hydraulic cylinder is a carefully designed seal kit—a set of precision components that prevent fluid leakage, exclude contaminants, and ensure smooth, efficient operation. When a cylinder begins to leak or lose power, replacing the seal kit is often the most cost-effective way to restore performance. This article explains what a hydraulic cylinder seal kit contains, how to choose the right kit, and best practices for installation and maintenance.

In rotating equipment—from electric motors and pumps to gearboxes and conveyors—protecting bearings from contamination and preventing lubricant leakage are critical to reliability and service life. For decades, oil seals (radial shaft seals) have been the standard solution for this task. More recently, bearing isolators have gained popularity as a non-contact, long-life alternative. While both serve the same fundamental purpose, they work on entirely different principles and are suited to different operating conditions. This article compares oil seals and bearing isolators, explains how each works, and provides guidance on selecting the right protection for your application.

This comprehensive guide explores Nitrile (NBR) O-Rings in depth. Learn about the chemical structure of NBR, the differences between 70 and 90 Shore A hardness, temperature limits, and why NBR remains the most popular and cost-effective sealing material in the industry. Brought to you by Forever Seals.

Proper installation is critical to O-ring performance. This guide covers best practices for O-ring installation, including surface preparation, lubrication, and common mistakes to avoid. Learn how to prevent leakage and extend seal life in your hydraulic and pneumatic systems.

This comprehensive guide explores hydraulic seals from the ground up. Learn about piston seals, rod seals, wiper seals, and guide rings. Compare material properties (PU, NBR, FKM, PTFE) and discover key selection criteria including pressure, speed, and temperature. Brought to you by Forever Seals.

This comprehensive guide explores spring-energized seals from the ground up. Learn how PTFE jacket and metal spring designs work, compare materials (PTFE, PEEK, UHMWPE), and discover key selection criteria for extreme temperatures, high pressures, and corrosive media. Brought to you by Forever Seals.

This comprehensive guide explores hydraulic seals from the ground up. Learn about piston seals, rod seals, wiper seals, and guide rings. Compare material properties (PU, NBR, FKM, PTFE) and discover key selection criteria including pressure, speed, and temperature. Brought to you by Forever Seals with over 17 years of sealing expertise.