Some common cylinder seals

Seals in cylinders are usually used to prevent hydraulic oil from leaking or to prevent external impurities from entering the cylinder. The following are some common cylinder seals:

O-ring: O-ring is one of the most common sealing elements and is made of materials such as rubber or polyurethane. It forms a seal between the cylinder and piston to prevent hydraulic oil leakage.

Oil Seal: Oil seals are usually made of rubber or polyurethane and are used to prevent hydraulic oil from leaking from the cylinder to the outside environment.

Sealing ring: The sealing ring is located between the cylinder and the piston and is used to provide sealing and protection.

Metal seals: Metal seals are usually made of copper, iron and steel and have high durability and high temperature resistance. They are often used in cylinders operating in high-pressure and high-temperature environments to provide good sealing effects.

Air blast spacer: The air blast spacer is usually made of rubber or polyurethane and is used to prevent external impurities from entering the cylinder and can also adjust the pressure in the cylinder.

Cylinder seal selection does require several factors to be considered. Here’s a more detailed explanation of each factor:

Working environment: Seals must adapt to the characteristics of the working environment, including the presence of dust, humidity, chemical corrosion, etc. For example, if the working environment is harsh, you may need to choose corrosion-resistant and wear-resistant sealing materials.

Pressure: Seals must be able to withstand the pressure in the system to prevent leaks. High-pressure seals typically have thicker wall thicknesses and more stringent dimensional requirements.

Temperature: The seal should be able to maintain good elasticity and sealing performance within the operating temperature range. High temperature conditions may require the selection of high temperature resistant materials.

Hydraulic oil type: Different types of hydraulic oil may have different effects on seal materials. Some hydraulic fluids may contain additives such as corrosion inhibitors and viscosity modifiers that may adversely affect seal materials. Therefore, when selecting a seal you need to ensure that it is compatible with the hydraulic oil used.

How it works: How the cylinder works may also affect seal selection. For example, for cylinders that vibrate or move at high speeds, you may need to select seals that can withstand high-frequency vibrations or high-speed movements.

It is recommended that when selecting seals, appropriate materials and sizes should be selected based on specific needs and application scenarios to ensure the best sealing effect and service life.