- A spark plug consists of a central electrode, a ground electrode, and a body. The central electrode, usually made of precious metals like iridium or platinum, creates the spark that ignites the fuel. The ground electrode, on the other hand, completes the circuit and helps in directing the spark to the correct location. The ceramic insulator ensures that the spark remains confined to the combustion chamber, preventing any loss of energy.
- Has a high tensile strength
The rubber seals are different from the requirements of the environment and the situation.
In these instances, Viton can be the perfect sealing material for methanol/ethanol-blended gasoline.
1. What are oil seals?
Generally, oil seals vary in materials and types based on the corresponding application. Common materials include:

crankshaft oil seal.
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.
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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.
When a seal is angularly misaligned – or cocked on the shaft – an irreversible process begins. Excessive pressure on one section of the seal, when not installed properly, can cause the spring to become dislodged or the seal to heat up and become brittle through excessive wear, both leading to a premature failure.

2) Special seal types and their features
If you follow the above instructions, the oil seals should work properly. Also watch the video below for an example of the installation process.
DIN
Conventional oil seals
Some Tools Required During Installation
If necessary, lever it gently with a broad screwdriver blade, but take care not to bend the flange or damage the head.

auto parts spark plug.
In addition to the installation procedure, our specialists and suppliers would also like to draw your attention to some cases that occur around oil seals.