Tag Archive | "seals"

PROMO: WHEN DURABILITY MATTERS, MAKE THE RIGHT CHOICE

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PROMO: WHEN DURABILITY MATTERS, MAKE THE RIGHT CHOICE


Promotional content written by Corteco

When seals become contaminated, vehicle performance and reliability is quickly compromised.

Lorries are expected to operate around the clock while exposed to moisture and general physical debris and still produce as little down time as possible. Operating conditions are harsh, but reliability remains vital for the driver and the customer. Cassette seals for axles provide the perfect solution and form part of a new generation of ‘closed sealing’ solutions that protects against contamination in working conditions and tough operating environments. Corteco has a comprehensive seal range for axle applications that now includes almost every sealing option, from traditional gaskets and O-rings to the latest low-friction Cassettes for CV and LCV.

Cassette Seals were developed for vehicles working continuously in extremely physical environments on a daily basis. Cassette sealing system technology is now used in a wide number of applications and available for a broad range of different sizes. The most important aspects for the selection of Cassette Seals are:

  • Temperature
  • Circumferential speed
  • Axial play
  • Fitting procedure
  • Degree of contamination of the surrounding area

Choice of sealing materials

In addition to its product design and innovative capabilities, Freudenberg Sealing Technologies has access to resources that include thousands of different types of raw materials. Each individual component may comprise of combinations of many different rubber or plastic compounds that are used in association with various coatings and adhesives. OE manufacturers rely on FST in the selection of raw materials, product design, as well as the development and production processes of the seals that are fitted to their vehicles.

The choice of sealing materials used in individual cassette seals is based upon:

  • Operating environment
  • OE requirements
  • FST experience

FST is a name that OE manufacturers know they can trust and that’s the reason why they manufacture billions of seals each year. By working closely with FST, Corteco has developed a Cassette Seals product range to match the needs of the aftermarket – and thanks to extensive logistical experience, the correct sealing solution for almost every application is never very far away.

Product Reliability

Cassette Seals deliver reliable first time fit solutions that fleet operators can depend upon. Each Cassette Seal includes:

  • Static sealing system
  • Dynamic sealing system
  • Dust lips for dirt protection

Fleet operators rely on the parts that are installed into their vehicles to withstand excessive pressure from everyday operating life. Fitting OE Cassette Seals ensures peace of mind and reduce costs and downtime making sure everything runs smoother.

Applications 

Automotive applications are characterized by contamination, intensive utilization and high speed for long distances and periods. The utilisation of Cassette Seals covers many fields including; pick-up, commercial vehicles and on-road trucks. 

General Industrial applications are characterised by the presence of severe contamination, intensive utilisation, continuous start and stops with short distances and high repair costs. The utilisation of Cassette Seals cover many fields including; off-road trucks, agriculture, earth moving machines, implements and many more.

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LUBRICATION THAT CAN DAMAGE OIL SEALS

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LUBRICATION THAT CAN DAMAGE OIL SEALS


PROMOTIONAL STORY ON BEHALF OF CORTECO

Today’s cars are becoming increasingly powerful but are still retaining the convenient size which fits with the chaotic world we live in. With cars becoming more demanding, the engines have to do more while trying to meet efficiency targets, this is helped by the engine oil that we put in to keep the car ticking over. However, although this oil is beneficial for many parts within the engine it also causes a lot of harm to components such as oil seals.

Oil additives are chemical components that improve the lubricating performance of the base oil. These additives are vital for the proper lubrication and prolonged use of engine oil in modern combustion engines. Without many of these the oil would become contaminated, breakdown, leak out or not properly protect the engine parts at all operating temperatures. Some of the most important additives include those used for viscosity and lubricity, contaminant control, for the control of chemical breakdown and for seal conditioning. The viscosity of oil also changes with temperature, becoming more viscous when cold and less viscous when hot. So the viscosity of the oil can be affected both by the weather and how hot your engine is.

Although the additives in the oil are extremely beneficial for most engine components, the additives being used today have an adverse effect on oil seals, often causing them to wear or leak causing early repairs being done to fix the problem. One way a seal can fail from oil additives is due to chemical compatibility, this is an issue that arises when changes are made to the formula of lubricants. Sometimes even though the base fluid remains the same an additive causes the seal to fail. However, the effect is not always predictable as the seal may wear out faster than expected or simply not perform as it should.

Alternatively the seal material can break down when it encounters a corrosive fluid. This will occur when the improper seal material is chosen for an application. The use of non-compatible materials can lead to chemical attack by oil additives, hydrolysis, and/or oxidation of seal elements. This will result in the loss of the seal lip interface, softening of the seal durometer, swelling, and/or shrinkage of the seal. Discolouration of the seal is an indicator of chemical erosion.

To avoid the seal from wearing early or not performing as expected then certain things need to be looked at. The fluid pressure range needs to be checked, this includes not just the operating range of the fluid system pressure, but also the severity and frequency of the system pressure peaks.

Another crucial factor is the temperature range as this will be effected by the additives within engine oil and can also be effected by the engine temperature and even the weather. The resting and operating temperature range of the fluid and the cylinder assembly are important with seal selection.

The fluid type due to the fluid media and viscosity are important for seal efficiency and effectiveness. Getting this right will ensure the long life of an oil seal as well as reduce the need for early repairs.

The size of the seal will determine the size of the cylinder. This includes the rod and bore dimension, seal groove dimensions, gaps, cylinders overall length, surface finish specifications and the stroke length. How the cylinder is used will impact how long it can last under certain operating conditions. This includes cylinder installation, environmental factors, and exposure to harsh conditions.

With oil additives being added to engine oil it is becoming ever more crucial to ensure the right seal is chosen not just for the application but for operating conditions and to work well alongside the additives.

Corteco offers a range of more than 7,000 gaskets and over 6,500 different shaft seals Simmering® and valve stem seals in OEM quality for a wide range of vehicle applications to ensure you can get the right seal for the job.

For more information on Corteco’s range of products head to www.corteco.com/en/products/sealing alternatives head over to Facebook, Twitter or LinkedIn and follow Corteco to get all the latest new, technical information and promotions.

 

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