Guide to oil seals for your application

Nitrile Butadiene Rubber (NBR, nitrile)

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NBR, also known as nitrile rubber or nitrile, is the most popular material for an oil seal because of its good resistance to many oils and greases, such as mineral grease and hydraulic oil. Depending on their composition, synthetic oils and greases, such as those based on glycol, can damage NBR rubber materials. Depending on the amount of glycol, a PTFE lip seal may be the best choice. NBR is also unable to cope with contact with acids and solvents. The rubber is suitable for oil and grease at temperatures from -35 °C to 100 °C.

Most ERIKS oil seals, such as the types M, MST, R and RST, are made of NBR as standard.

Fluorine rubber (FKM, Viton&#;)

FKM or FPM, which is in well-known brand Viton&#;, can withstand higher liquid temperatures of up to 180 ˚C. FKM is highly resistant to strong acids and bases, as well as to synthetic oils and greases. Glycol-based oil and grease, however, can also damage FKM.

Because of the higher temperature resistance of FKM, this material is also chosen for applications where higher speeds play a role, which raise the temperature at the sealing lip considerably. Usually, using FKM will result in a longer life than using NBR. This compensates the higher price of FKM compared to NBR, as an FKM does not have to be replaced as frequently. The low temperature resistance of standard FKM is limited to -15 ˚C.

Polytetrafluoroethylene (PTFE, Teflon®)

PTFE, which is used in the well-known brand Teflon®, is less commonly used, but it is the preferred material for specific rotating seals in the chemical, food and pharmaceutical industries. This material is notable for having a very low frictional resistance and the best chemical resistance. It can also withstand a very wide range of temperatures in these types of seals; -80 ˚C to 200 ˚C. The shafts on which oil seals with PTFE lips are used require a harder and finer finish. Something like an axle sleeve can also be used to meet this requirement.

EPDM

EPDM oil seals are less common. They are used in solvent, hot water and steam applications, EPDM resists low temperatures down to -50 °C and UV radiation well. Some types of EPDM are also suitable for higher temperatures up to +150 °C. EPDM oil seals are usually available upon request.

VMQ (silicone)

VMQ, also known as silicone, is also used for oil seals, but this is less common because the mechanical strength of VMQ is low and this material has poor wear-resistance This makes it less suitable for dynamic applications, but it can withstand fairly low and high temperatures from -60 °C to 200 °C. Many types of VMQ are also suitable for contact with pharmaceutical and food products, so VMQ is an option worth considering. VMQ oil seals are usually available on request.

Understanding Power Steering Seal Kits

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Power steering is an essential feature in modern vehicles, providing the driver with improved control and comfort while maneuvering. As with any mechanical system, components within the power steering system can wear out or develop leaks over time. One of the critical components that may require replacement is the sealing system, which is where power steering seal kits come into play.

What is a Power Steering Seal Kit?

A power steering seal kit is a collection of various seals, O-rings, and gaskets designed to repair leaks in the power steering system. These kits are tailored for specific vehicle makes and models, ensuring that the right components are provided for effective repairs. The seals within the kit help maintain the hydraulic pressure necessary for the steering system to function correctly, preventing fluid loss and thereby ensuring that the steering remains smooth and responsive.

Importance of Seals in Power Steering Systems

Seals play a crucial role in the overall health of the power steering system. They prevent the hydraulic fluid from leaking out of the steering gear, steering rack, and pump. When these seals fail, it can lead to a drop in hydraulic fluid levels, resulting in increased steering effort, noise, or even complete steering failure in severe cases. Additionally, low fluid levels can cause further wear on the power steering pump and other components, leading to more significant repair costs down the line.

Recognizing the signs of failing seals in a power steering system can save a driver time and money. Common symptoms include

1. Fluid Leaks - Puddles or spots of power steering fluid under the vehicle is one of the first signs of a failing seal. 2. Noisy Steering - Unusual whining or groaning noises when turning the steering wheel can indicate low fluid levels due to seal failure. 3. Stiff Steering - Difficulty in steering, requiring more effort than usual to turn the wheel, suggests that the power steering system is not functioning optimally. 4. Fluid Contamination - If the power steering fluid appears dirty or has a burnt smell, it may mean that the seals are failing, allowing contaminants into the system.

Choosing the Right Seal Kit

When selecting a power steering seal kit, it&#;s essential to choose a kit that is compatible with your vehicle's specifications. Different vehicles have different hydraulic pressure requirements, sizes, and shapes of seals. Additionally, quality matters; high-quality kits often utilize durable materials that can withstand the pressures and conditions within the power steering system for a longer lifespan.

Installation and Maintenance

While some vehicle owners may attempt to replace seals themselves, it often requires a certain level of mechanical skill and understanding of the power steering system. If you&#;re not confident in your abilities, it&#;s advisable to seek professional assistance. Regular maintenance, including checking fluid levels and inspecting seals during routine services, can also help catch potential issues early.

In conclusion, a power steering seal kit is a vital component for maintaining the efficacy and safety of a vehicle&#;s steering system. By understanding its importance, being aware of the signs of failure, and knowing how to select the correct kit, vehicle owners can ensure a smoother driving experience and prolong the life of their power steering systems. Regular maintenance and timely repairs can save drivers from costly replacements and keep their vehicles operating in peak condition.

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