Archive for feiyun seal factory

What is a Cassette Seal? A cassette seal—also known as a cartridge seal or unitized seal—is a fully assembled, self-contained sealing solution engineered for rotary shaft applications. Unlike traditional lip seals or mechanical face seals that require separate components to be aligned and fitted individually, a cassette seal integrates all necessary sealing elements into a […]

What Does a Hub Oil Seal Do? A hub oil seal (also known as a wheel hub seal or hub seal) is a critical component in automotive and industrial systems, serving as a barrier between the rotating wheel hub and stationary axle housing. Its primary role is to retain lubricants and exclude contaminants, ensuring the […]

What is an S-Type Oil Seal? An S-type oil seal (also called an S-seal or Type A radial shaft seal per DIN 3760/ISO 6194-1) is a standardized single-lip rotary shaft seal designed to retain lubricants and prevent fluid leakage in low-pressure applications. Its name originates from the S-shaped cross-section of its elastomeric sealing lip, which […]

How Many Types of Hydraulic Seals Are There? Hydraulic seals are critical components in fluid power systems, designed to prevent leakage and ensure efficient operation. While classifications may vary slightly across industries, hydraulic seals are broadly categorized by motion type, design/function, material, and application. This article provides a comprehensive breakdown of these categories and answers […]

What is a DAs Seal? A DAs seal (also written as D‑A‑S, DA‑S, or DAs) is a compact, double-acting piston seal assembly designed for hydraulic systems. Combining sealing, guidance, and backup functions into a single unit, it ensures reliable bidirectional sealing under high-pressure conditions. This guide explores its construction, materials, applications, and advantages, providing a […]

What Is an Oil Seal Ring? An oil seal ring (also called a shaft seal, radial lip seal, or grease seal) is a precision-engineered mechanical device critical to machinery operation. It prevents lubricants like oil or grease from leaking out of rotating or reciprocating shafts while simultaneously blocking contaminants such as dirt, dust, and water […]

What is the Difference Between Piston Seal and Rod Seal? Hydraulic and pneumatic cylinders rely on specialized seals to maintain pressure integrity and prevent contamination. Among these, piston seals and rod seals are critical components with distinct roles. This article explores their differences in location, function, design, materials, and operational considerations. 1. Location in the […]

What is a Piston Seal? A piston seal is a critical component in systems involving reciprocating motion, such as hydraulic/pneumatic cylinders, internal combustion engines, compressors, and actuators. It ensures efficient energy transfer by sealing the gap between the piston and cylinder bore, preventing fluid or gas leakage while maintaining pressure differentials. This article provides a […]

What Is the Difference Between a Seal and an Oil Seal? The distinction between a seal and an oil seal lies in their applications, materials, designs, and functional roles within mechanical systems. While all oil seals fall under the broader category of seals, they are specifically engineered for unique purposes. Below is a comprehensive breakdown […]

What is the Difference Between a Buffer Seal and a Rod Seal? Rod seals and buffer seals are critical yet distinct components in hydraulic cylinder sealing systems. While they work synergistically, their roles, designs, and operational priorities differ significantly. This article breaks down their differences in function, placement, materials, and applications to clarify their unique […]