- E3 Spark Plugs is a well-known brand in the automotive industry, providing high-quality spark plugs for various vehicles. The E3 spark plug is designed to improve engine performance, fuel efficiency, and overall vehicle reliability. With their innovative design and advanced technology, E3 spark plugs are a popular choice among car enthusiasts and professionals alike.
Reinforced GVP design for larger diameters, with rotation speeds of up to 15 m/s and pressure of 3-4 bar
Nitrile Butadiene Rubber (NBR, nitrile)
Runout
The metal case is the exterior (or frame) of the oil seal, the principal function of which is to give rigidity and strength to the seal. The material of the case must be selected depending on the environment where the seals are to be used. Often the metal case is covered by the same rubber material used in the sealing element, which also helps seal the exterior of the oil seal in the housing bore. Common case material types are:

The oil seal should be tough enough to withstand the pressure and the vibrations caused by the shaft and bore. Check if the oil seal is strong enough to tolerate the pressure and vibration.
1、For the factory


The pulley is kept from turning on the crankshaft by a key fitting into grooves on the crankshaft and pulley.
Material Code ISO 1629
When the oil seal material and the chemical are not compatible, there will be a chemical attack, which increases at high temperatures. The only way to remedy this is to select the right material for your application. If you’ll be dealing with harsh chemicals, choose oil seals that are made with reliable materials for their compatibility.
