No Cylinder Can Work Without a Cylinder Seal

When you pass by a building site, you can see many machines such as excavators with professionals. Do you ever wonder how these large machines work? Actually, a cylinder is one of the significant elements to drive a machine to work. Besides, it should be noted that no cylinder can work without a cylinder seal. In this article, we’ll walk you through the cylinder seal, and expect to help you make a conscious and informed purchase.

With the development of economy and urbanization, the number of skyscrapers grows rapidly, so did the production and demand for machines and cylinder seal. As a matter of fact, an increasing number of cylinder seal manufacturers identify the business opportunity, explore the market and finally make a fortune these years. Take YBAS SEALS as an example. According to the market demand, YBAS SEALS has become one of the leading China-based companies which integrates production, research and development, sales and service, and has always adhered to high-quality products and excellent after-sales service. Their seal products are widely used in various excavators and hammer breaker machine, which has been favored and recognized by customers worldwide.

Before we talk about the cylinder seal, let’s get to know the cylinder. The cylinder is a pneumatic actuator which converts the pressure energy of compressed gas into mechanical energy in pneumatic transmission. According to different purposes, there are many kinds of cylinders. Among them, a single-rod two-way cylinder is the most widely used one. It consists of a cylinder barrel, cylinder head, piston, piston rod and cylinder seal.

The quality of the cylinder seal directly affects the performance and service life of the cylinder. Cylinder seals are mainly used to prevent gas leakage. They are good at oil-proof, waterproof and anticorrosive. A high-quality cylinder seal can not only ensure the sealing, but also reduce the sliding friction to the maximum, which can achieve the perfect operation of the cylinder. Therefore, there is no denying that the cylinder seal is essential for the cylinder. 

Cylinder seal can be made of oil-resistant rubber, polyurethane, polyvinyl chloride, grey cast iron, etc. In addition, its shape can be O-shaped, Y-shaped, L-shaped, etc. According to the sealing process, the cylinder seal can be divided into compressed cylinder seal and pneumatic cylinder seal.

Compressed Cylinder Seal

When the compression cylinder seal is put into the sealing groove, there is a certain amount of pre-compression. The higher the pre-compression, the better sealing performance, but the greater the friction resistance. The leakage path is blocked by the pressure of the contact surface on the sealing surface.

The most common one is the O-shape seal. The compression of it is generally 15-30%. It has the advantages of simple structure, convenient installation, small space occupation and low price. For example, Oil Seal TCV/TCN For Excavator from YBAS SEALS gains wide popularity of many customers across the world. It has a longer lifespan compared to other cylinder seals from other companies. The most important thing is that, it has a good sealing efficacy and relatively low frictional drag when the piston moves.

Pneumatic Cylinder Seal

In order to ensure sealing, pneumatic cylinder seal press the lip of the cylinder seal on the sealing surface by air pressure. The higher the pressure, the better sealing performance and the greater the friction resistance. What’s more, it can only be sealed in one direction.

U-shaped and Y-shaped cylinder seal are the most common. The structures of their sealing grooves are simple, and their sealing performances are great. That’s why they are also widely used at present.

How to make a perfect purchase of cylinder seal? Three factors you should take into consideration.

Pressure caused by mechanical operation

The higher the pressure, the greater the influence of other factors on the performance of seals, such as temperature, speed, the material of seals, clearance between piston and cylinder, clearance between piston and cylinder head.

Friction caused by mechanical movement

It would be better if the friction is small. The frictional force of the cylinder seal depends on many factors: the material, the type and the movement speed of the cylinder seal.

Mechanical interior space

The surface characteristics of the cylinder piston and piston rod also have a significant influence on the life of the cylinder seal. Surface performance parameters should be measured according to the actual situation, because even under the same roughness, different surface shape characteristics can lead to different degrees of wear of cylinder seal.

Now that you’ve gone through the whole passage about cylinder seal, we believe that you gain enough information and are able to make up your mind. We recommend Oil Seal TCV/TCN For Excavator from YBAS SEALS for you, don’t hesitate to try!

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