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  • Modern engine oils, such as the current SG classification for gasoline engines, contain a large fraction of additives, many of which are detrimental to fluoroelastomers. The primary functions of oil-additive packages are to protect metal parts, avoid deposits in the engine, minimize oil degradation, and adjust fluid viscosity. Little attention has been paid to avoiding damage to rubber seals. Instead, elastomer producers have been expected to provide new, higher-performing products at no increased cost to auto manufacturers. Among the additives with moieties that may attack fluoroelastomers at high temperature are detergents (phenolates), dispersants (succinimides, alkylphenol amines), and antioxidants (amines, sulfides, hindered phenols).4 Many of these components are multifunctional, containing phenol or amine groups that can dehydrofluorinate and crosslink VDF-containing fluoroelastomers, leading to loss of elongation and eventual embrittlement. However, the rate and extent of reactions with seals are affected by many factors, including whether air is present in the system. When oil is exposed to air at high temperature, additives may undergo considerable changes. For example, a significant fraction of amines may be oxidized to amides, which have little effect on fluoroelastomers.5

  • Reinforced GVP design for larger diameters, with rotation speeds of up to 15 m/s and pressure of 3-4 bar

  • Production seals of very common materials, oil - resistant sealing products adopt butyronitrile rubber.
  • Leather is probably the oldest of the lip materials still in common use, but the move towards mass production methods has seen a massive increase in the development of synthetic rubbers which lend themselves to accurate and repeatable injection and compression moulding. Nitrile (NBR) is still by far the most common elastomer for “normal” use, whilst Viton® (FKM/FPM) is rapidly replacing Polyacrylate (ACM) and Silicone (VMQ) for high-temperature applications. Viton® also has high resistance to abrasion and chemical attack making it a preferred elastomer. Recent developments in the use of PTFE for Rotary shaft seals has caused widespread interest particularly for high-speed shaft rotation or poor lubrication applications.

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  • What should you take into account when selecting an oil seal? Different types of oil seals and various types of materials are available, each designed for specific uses. It is also important to select the right size of oil seal for the best results. For this reason, selecting the right oil seal requires adequate understanding of the application in which it will be used.

  • Its sealing edge comes in full contact with the shaft surface in order to provide excellent sealing performance.
    (See Figure 3.)

  • Housing Stop Installation

  • In line with global environmental standards, spark plug manufacturers in China are increasingly focusing on sustainable practices and eco-friendly materials. Compliance with environmental regulations and the adoption of green manufacturing processes are becoming integral to the production of spark plugs. Customers seeking spark plugs and wires can inquire about the environmental policies and certifications of suppliers to align with their sustainability goals.

  • Moreover, the philosophy behind universal spark plug wires reflects the essence of universality itself—the notion that certain truths and functionalities are common across all domainsuniversal spark plug wires. Education, for instance, relies on universal principles of learning and knowledge transfer. Healthcare improvements in one country can be conveyed through medical literature and shared practices, benefiting people around the globe.
  • Hub oil seals are essential components in automotive and industrial systems, serving to maintain the integrity of the wheel hub assembly. These seals prevent the leakage of lubricating oil and the entry of contaminants, safeguarding the wheel bearings and other internal components. In industrial applications, hub oil seals contribute to the smooth operation and reliability of machinery, ensuring optimal performance and safety.


  • Types of Materials Used for Manufacturing Oil Seals

  • 1. Material Selection The first step is to select the appropriate material based on the specific requirements of the application.