What is a ………?

An explanation of the seals found in Hydraulic and Pneumatic applications.

Wiper/Scraper Seal

A wiper/scraper seal is designed to prevent dirt, dust, and other contaminants from entering a hydraulic or pneumatic system. Positioned at the cylinder rod’s external end, it removes debris from the rod’s surface during operation. This prevents abrasive damage to internal seals and components, ensuring system longevity and reducing maintenance costs. Wiper seals are crucial in harsh environments where contamination risks are high.

Rod Seal

A rod seal is a critical sealing component in hydraulic and pneumatic systems, preventing fluid leakage along the piston rod as it moves. It is installed at the cylinder's opening and ensures pressure retention while keeping contaminants out. Rod seals must withstand high pressures, dynamic motion, and varying temperatures, ensuring the cylinder operates efficiently without external leaks.

Piston Seal

A piston seal is used to create a tight seal between the piston and the cylinder wall in hydraulic or pneumatic systems. It prevents fluid or gas from bypassing the piston, maintaining pressure for efficient force transmission. Piston seals are designed to handle high-pressure environments, dynamic movement, and minimize wear, ensuring reliable system performance.

Guide Ring

A guide ring, also known as a wear ring, prevents metal-to-metal contact between the piston and cylinder wall or the rod and cylinder head. It provides radial support, ensuring smooth linear motion and protecting seals from excessive wear. Guide rings are made from durable, low-friction materials to handle high loads and extend component life.

O-Ring

An O-ring is a versatile, circular sealing element with a cross-section resembling a donut. Used in static and dynamic applications, it provides a leak-proof seal by compressing between two surfaces. O-rings are simple, cost-effective, and capable of withstanding high pressures and various fluids, making them essential in countless industries.

Backup Ring

A backup ring is a supportive component used with O-rings to prevent extrusion under high pressure. Typically made of durable materials like PTFE, it is placed on the low-pressure side of the O-ring, extending its life and maintaining sealing efficiency in extreme pressure or temperature conditions.