- To perform a spark test, you'll need a spark plug tester, which checks the spark plug's ability to produce a spark. Connect the tester to the spark plug and the ignition system, then crank the engine. A healthy spark plug should produce a strong, blue spark across the gap A healthy spark plug should produce a strong, blue spark across the gap
A healthy spark plug should produce a strong, blue spark across the gap A healthy spark plug should produce a strong, blue spark across the gap
testing a spark plug. If the spark is weak or absent, the plug might be faulty and needs replacing.

Despite being a great substitute for more expensive high temperature resistant materials, polyacrylate has a problem of poor water compatibility and cold flexibility.

Table 2 a): Common types of oil seals (with spring)
Sealing lip

Depending on the application, premium lip materials may need to be used, such as Ethylene-acrylic (Varmac®). This material features good abrasion and dry running capabilities, higher heat capabilities than nitrile and polyacrylate, and better low-temperature performance than polyacrylate.
In addition to withstanding high pressures, oil seals must also be able to withstand the harsh conditions often found in industrial settings. This includes exposure to oil, chemicals, heat, and vibration, which can all contribute to the degradation of the seal over time. Proper selection of materials and regular maintenance are essential for ensuring the longevity and reliability of high-pressure oil seals.
14.2 Oil-Seal Requirements
Oil seal characteristics