The main control parameter in the design and use of the dust ring is the contact pressure and contact angle of the dust ring. The proper lip interference is the premise of meeting the proper contact pressure and angle, otherwise it will lose its defense. Dust effects or severe wear of the dust ring.

The following highlights the structure of several typical dust seals.

P6 type dust ring

This type of dust ring has the following performance characteristics:

1. The outer circle is positioned reliably.

2. Good scratch and erase dust effect.

3. The wiper ring can be used over a wide temperature range.

4. There is no back pressure between the seal ring and the dust seal.

The material can be selected according to the requirements of nitrile rubber NBR, urethane rubber PU or fluororubber FKM. When designing the product, the outer circle must be tightly hooped to achieve a better sealing effect.

SDR type dust ring

This type of dust ring is a two-way dustproof seal. It has a U-ring seal function inward; it has a scratch-proof function to prevent dirt from invading. Its characteristics are as follows:

1. Good scratching and dust removal while preventing residual oil film from extending on the piston rod.

2. The outer circle is well positioned.

3. Wide temperature range.

The material can be selected according to the requirements of nitrile rubber NBR, urethane rubber PU or fluororubber FKM. When designing the product, the outer circle must be tightly hooped to achieve a better sealing effect.

SM type dust ring

The performance characteristics of the SM wiper are basically the same as those of the SDR type, except that there are some structural changes. When designing the structure of the product, the outer circle must be tightly held to achieve a better sealing effect.

Frame type dust ring

Applicable to oil pressure. When the medium is mineral oil, the applicable temperature range is -35～+100°C: when the medium is water and gas, the applicable temperature range is ≤70°C, and its characteristics are as follows:

1. Positioning is firm (interference fit).

2. There is no open loop gap to the outside between the piston rod and the dust seal.

In recent years, this type of skeleton dust ring has been improved a lot. It is a widely used form. Its semi-circular dust lip can reliably scrape the dirt, while the piston rod is retracted. An oil film is left on the surface of the piston rod, which helps to improve the friction performance, sealing performance and service life of the entire system.

PT combination dust ring

The combination of dust-proof ring is also widely used. In some areas, it is replacing a single rubber dust-proof ring. The structure and form of the combination dust-proof ring have been developed by various manufacturers in recent years. Here, only the PT combination is briefly introduced. Type dust ring.

The PT type dust ring is made of a wear ring with a sealing edge and a dust-proof cutting edge and two as a pre-tightening

The lip ring of the O-ring of the component. It is used to improve overall sealing performance and works better with rod seals. Its characteristics are as follows:

1. Excellent adjustment and positioning ability in the work.

2. High-function guarantee, can adapt to all operations in a short period of time.

3. High wear resistance.

4. The friction coefficient is low and there is no stickiness.