Selection of rubber seals in pneumatic systems and technical guidelines

In pneumatic systems, the choice of rubber seals directly affects the stability and performance of the system. The correct selection of suitable sealing rings can effectively prevent gas leakage and improve the efficiency and reliability of the system. This article will discuss the key points and technical guidelines for the selection of rubber seals in pneumatic systems, to help engineers and users to make the correct selection of seals.

Select points

Working pressure and temperature range:

First of all, the working pressure and temperature range of the pneumatic system must be considered. Different rubber materials have different pressure and temperature resistance characteristics, for example, nitrile rubber is suitable for general industrial pneumatic systems, while fluorine rubber is able to withstand higher temperatures and chemical corrosion.

Media Type:

The type of medium in which the sealing ring is in contact is critical to the choice of material. For example, oxygen, grease, water and other media may have different compatibility requirements for the material of the sealing ring, and it is necessary to choose a rubber material that is resistant to chemical corrosion.

Type of exercise:

Determine the type of motion at which the seal is located, such as static or dynamic sealing, and reciprocating or rotating motion. Different sealing ring designs and materials are suitable for different modes of movement, and the appropriate type should be selected according to the actual situation.

Size and shape:

The size and shape of the sealing ring must match the installed sealing groove to ensure good sealing performance. When selecting, the size of the sealing slot should be accurately measured to avoid leakage problems caused by inappropriate size.

Technical guide

Commonly used materials and their characteristics:

Nitrile butadiene rubber (NBR) : Suitable for general industrial pneumatic systems, it has good oil resistance and wear resistance.

Fluororubber (FKM/Viton) : high temperature and chemical resistance, suitable for high temperature and special media pneumatic systems.

Silicone rubber (VMQ) : High temperature resistance, excellent electrical insulation properties for high temperature pneumatic systems and food grade applications.

Neoprene rubber (CR) : aging resistance, ozone resistance and good weather resistance, suitable for outdoor environments or pneumatic systems with ozone contact.

Installation and maintenance precautions:

When installing, ensure that the surface of the seal ring is clean and apply an appropriate amount of lubricant to reduce friction and wear.

Check the sealing effect of the sealing ring regularly, and replace the aging or severely worn sealing ring in time to avoid system leakage and damage.

Selection of qualified suppliers:

Choose suppliers with good reputation and production experience to buy high-quality rubber seals to ensure that the products meet the relevant standards and quality requirements to improve the stability and safety of the system.

Through the above selection points and technical guidelines, users can help select and apply the appropriate rubber seals in the pneumatic system, ensure the long-term stable operation and safety of the system, reduce maintenance costs and downtime, and improve work efficiency.

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