- Regular maintenance and inspection of jet engine spark plugs are essential to ensure the safe and reliable operation of an aircraft. During routine maintenance, the spark plugs are checked for wear and tear, fouling, and other signs of damage. If any issues are detected, the spark plug must be replaced immediately to prevent engine malfunctions.
D - 4
Also known as a Rotary Shaft Seal, Shaft Seal, Lip Seal, Elastomeric Lip Seal or any variation of these. It is a simple device for excluding dust, dirt, water or any other contaminant whilst retaining lubricant in rotary shaft equipment. Generally, it has been developed as a means of protecting the bearings of rotating shafts.
With the help of tips and information from our suppliers, our specialists will be happy to explain how to install oil seals. Please read the instructions carefully before installation.

Oil seals work by squeezing and retaining lubricant in a thin layer between the lip and the shaft. Perfect sealing is ensured by the hydrodynamic action of the rotating shaft, which in turn produces a slight pump action.
ERIKS type M (type B according to the DIN standard) has a single metal casing and rubber sealing lip. Since the casing is made of metal, it must be fitted in a well-finished, undamaged groove. Large volumes of oil seals with metal casings are often cheaper, which is why they are often used as original equipment in machines. However, if an oil seal has to be replaced, types with a rubber exterior (type R or RST) are easier to fit. Type MST is similar to M and commonly used. The difference is the dust lip in the MST oil seal that prevents dust and dirt reaching the sealing lip, and extends its service life in dusty environments.
6 GUIDELINES TO FOLLOW WHEN CHOOSING AN OIL SEAL
As shown in Figure 1, sealing devices come in two types: contact and non-contact.
Oil seals are among the major contact type sealing devices.
Auto Spark Plug: Essential Component in Automotive Ignition Systems
Hydrogenated nitrile rubber (HNBR)
Conclusion
we offer oil seals made from the highest quality materials to ensure durable, reliable seals for a variety of applications. Our state-of-the-art machining services allow us to deliver custom seals to meet customer requirements for quantity, size, style, profile, and materials.
This tough, chemically inert polymer has a wide working scope as well as: