What type of seal is commonly used in hydraulic cylinders?

O-ring seals are widely used in hydraulic cylinders due to their design and effectiveness in preventing leaks. These seals are circular in shape and made from materials that can withstand high pressure and provide reliable sealing across a range of temperatures and fluids. The elasticity of O-rings allows them to compress and create a tight seal between two surfaces, which is crucial in hydraulic applications where fluid containment under pressure is essential for maintaining system integrity and performance.

Furthermore, O-ring seals are relatively easy to install and replace, making them a practical choice for maintenance and assembly in hydraulic systems. The ability to select O-rings from various materials also allows for compatibility with different hydraulic fluids, enhancing their versatility in different applications.

While other types of seals like gaskets or cap seals may have their own applications, they do not provide the same level of reliability and performance specifically for hydraulic cylinder use as O-ring seals do.