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  • Post time: 16-03-23
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  • Material
  • Applications of Molded Gaskets
  • Purpose of oil seal

  • From this kind of standard immersion testing, one would expect that bisphenol-cured VDF/HFP/TFE fluoroelastomers would not give good service life as oil seals. Similar tests with other elastomers, such as HNBR, silicone, and acrylic rubbers, show less loss of elongation. However, it is found that, in actual service, FKM shaft seals6 have much longer service life than seals of the other elastomers. In a Japanese study of FKM lip seals, rear crankshaft seals from high-mileage automobiles (70,000–280,000 mi ie, 110,000–450,000 km) were collected and examined. No serious oil leakage was found when the seals were removed from the engines. Some deposits were found around the seal lip and on the garter spring holding the lip against the shaft. No surface cracks were found on the seal lip, and only minor crazing on the crankcase side of the flexure portion of the seal in some samples. The seal compositions were not noted, but most were probably VDF/HFP/TFE elastomers with 68–69% fluorine content.

  • A temperature range from 75 degrees Fahrenheit to 400 degrees Fahrenheit 
  • In the world of internal combustion engines, the role of spark plugs is paramount. They ignite the air-fuel mixture in the engine's cylinders, triggering the controlled explosion that propels your vehicle forward. One variant that has garnered significant attention in recent years is the Turbo Spark Plug. This innovative technology takes the standard spark plug to new heights, offering a blend of enhanced efficiency and performance.
  • The quality and condition of diesel glow plugs significantly impact the overall efficiency of the enginediesel spark plugs. High-quality spark plugs, such as those from renowned brands, ensure a more consistent ignition, smoother engine operation, and better fuel economy. They are usually made from durable materials like platinum, iridium, or ceramic, providing longevity and resistance to extreme temperatures.
  • From this kind of standard immersion testing, one would expect that bisphenol-cured VDF/HFP/TFE fluoroelastomers would not give good service life as oil seals. Similar tests with other elastomers, such as HNBR, silicone, and acrylic rubbers, show less loss of elongation. However, it is found that, in actual service, FKM shaft seals6 have much longer service life than seals of the other elastomers. In a Japanese study of FKM lip seals, rear crankshaft seals from high-mileage automobiles (70,000–280,000 mi ie, 110,000–450,000 km) were collected and examined. No serious oil leakage was found when the seals were removed from the engines. Some deposits were found around the seal lip and on the garter spring holding the lip against the shaft. No surface cracks were found on the seal lip, and only minor crazing on the crankcase side of the flexure portion of the seal in some samples. The seal compositions were not noted, but most were probably VDF/HFP/TFE elastomers with 68–69% fluorine content.

  • What are oil seals?

  • Synthetic rubber gaskets are a crucial component in a wide range of industrial applications, providing a reliable and cost-effective solution for sealing gaps and preventing leaks. These gaskets are made from synthetic rubber materials that offer superior resistance to heat, pressure, and chemicals, making them ideal for use in demanding environments.
  • The metal used in the outer case of oil seals is usually made of carbon steel. Upon request, and depending on quantities, a different type of steel (such as stainless steel) can be used.

  • One of the primary functions of the rubber carburetor gasket is to prevent leaks. When installed correctly, it creates a barrier that prevents fuel, oil, and other fluids from escaping from the carburetor. This is particularly important in older engines, where leaks can quickly lead to catastrophic failure. By maintaining a tight seal, the rubber carburetor gasket helps to ensure that the engine runs at peak efficiency, maximizing power output and fuel economy.
  • Oil seals come in various shapes to fit the machine or substance for sealing.
    For this reason, when designing a machine, it is important to select the oil seal that is right for that machine.
    Next time, we will explain the key points to consider when selecting your oil seal.

  • Synthetic Rubber Oil Seals - Styrene Butadiene Rubber oil seals, or just SBR oil seals, offer strong resistance to abrasions and lesions, making them an ideal seal for fast-moving machinery. With the ability to withstand extreme temperatures with its heat-aging qualities, they can be used in outdoor components. They are also seen as more cost-effective oil seals than natural rubber.

  • Another important factor is the quality of the oil used in the engine. Oils with low viscosity or poor quality can cause the main bearing oil seal to fail prematurely. Therefore, it is essential to use high-quality oils that are specifically formulated for use in engines. These oils have the right balance of viscosity and additives to ensure optimal performance and longevity of the oil seal.
  • 1. Excellent Sealing Performance Extruded silicone gaskets provide a superior seal compared to other gasket materials, making them ideal for high-pressure and high-temperature applications.
  • c. Silicone Rubber (SI) – these compounds operate effectively in a broad temperature range of -58⁰ F to 356⁰ F (-50 to 180⁰ C). Silicone rubber is a leading choice for its resistance to both low temperatures and heat. The high lubricant absorbency of the material minimizes friction and wear. These oil seals are usually used as crankshaft seals. Silicone has poor resistance to hydrolysis and should not be used in oxidized or hypoid oils.