Ultimate Guide to Oil Seals | Part-2: by CV Technik

The attributes of HNBR are influenced by the composition of acrylonitrile and the extent of hydrogenation of the butadiene copolymer. HNBR boasts superior oil and chemical resistance compared to Nitrile Rubber, along with the ability to endure higher temperatures. It demonstrates exceptional resilience to sour oil and gas, steam, hot water, and ozone exposure. Furthermore, its physical properties, such as tensile and tear strength, elongation, abrasion resistance, and compression set, are remarkable. HNBR compounds also exhibit robust dynamic performance at elevated temperatures. Nevertheless, it has drawbacks like poor electrical properties, poor flame resistance, and vulnerability to aromatic oils and polar organic solvents.

Want more information on High Quality Oil Seals? Feel free to contact us.

Temperature Range: -30°C to +150°C

HNBR Oil Seal Advantages: Excellent mechanical and physical properties, superior oil and chemical resistance compared to NBR.

HNBR Oil Seal Suitable for: Ideal for environments involving oil and gas, steam, hot water, ozone, sour gasoline, fats, acids, and alkalis.

HNBR Oil Seal Not Suitable for: Ineffective against ketones, strong hydrocarbons, aromatic oils, and polar organic solvents.

Varieties of Oil Seals

Are you aiming to safeguard your equipment from leaks but uncertain about which rotary shaft seal to choose? This guide will provide the necessary insights for selecting the appropriate seal for your application.

Oil seals, also referred to as rotary shaft seals, fluid seals, or grease seals, are crucial in sealing gaps between moving and stationary parts of machinery.

By preventing lubricants from escaping, they shield vital components of equipment from leaks that could lead to significant and costly damage. From automotive engines to industrial machines, these oil seals are essential for preventing interactions that could impair critical parts.

With a vast array of oil seals available for various applications, this guide will break down the most common types to help you select the ideal one for your machinery.

Defining Rotary Shaft Seals

Rotary shaft seals, or oil seals, are positioned between moving and stationary machine components to prevent contaminants, moisture, corrosive substances, and abrasives from inflicting damage. They also inhibit the undesired mixing of fluids, such as water and oil within a machine.

Manufacturing Process of Oil Seals

Initially, an elastomer, typically nitrile, is vulcanized to a metal ring. This imparts a stiffening effect that incorporates a specialized metal tension spring directly behind the sealing lip, ensuring the oil seal remains in place against the moving part.

Materials Used in Oil Seals

Various materials are utilized in the fabrication of oil seals.

Leather Oil Seals: Also known as Type L Oil Seals, these are prevalent in elements exposed to dirt and minimal lubrication. Pre-lubricated and capable of absorbing fluids, leather oil seals offer sealing properties in situations where synthetic rubber fails.

Synthetic Rubber Oil Seals: Styrene Butadiene Rubber oil seals (SBR oil seals) are revered for their strong abrasion resistance, making them suitable for high-speed machinery. They can endure extreme temperatures due to their heat-aging characteristics, making them ideal for outdoor use and more cost-effective than natural rubber.

For more information about 370004a, contact us today for expert consultation!

Nitrile Oil Seals: Nitrile oil seals, commonly known as acrylonitrile-butadiene rubber seals, are versatile and widely used due to their resistance to fats, hot water, gasoline, mineral oils, grease, and animal oils. However, they are not suited for environments with extreme temperature changes.

Viton Oil Seals: Made from synthetic rubber and fluoropolymer elastomer, Viton oil seals are resistant to high temperatures (up to 250°C) and chemicals. They are suitable for components that frequently interact with petroleum and solvents.

Polyacrylate Oil Seals: Ideal for automotive and transmission applications, polyacrylate seals can withstand fuel, oil, ozone, sunlight, and weather but lose flexibility in low temperatures.

Silicone Oil Seals: These seals absorb lubricants to reduce wear and friction and offer high thermal resistance. However, they do not handle abrasions well and are incompatible with oxidized oils.

PTFE Oil Seals: A new and innovative oil seal, PTFE (polytetrafluoroethylene), can perform in dry or unlubricated conditions. With a thermal range of -130°C to +200°C and strong chemical resistance, PTFE seals are considered the future of rotary shaft seals.

Selecting the Appropriate Oil Seal

Key factors to consider when choosing oil seals include:

Pressure: Understanding the compression set of your components is crucial as many oil seals can only endure low-pressure applications.

Temperature: The operating temperature range of your oil seal is vital to ensure it can withstand the required conditions. PTFE seals are versatile in extreme temperatures.

Shaft Speed: The speed of the shaft, runout, housing bore, and type of oil being sealed must be considered to prevent abrasions or spiraling.

Fluid Types: Knowing the fluid the seal will interact with ensures the longevity of the seal and machinery components.

Lubricant Amount: Seals perform best when lubricated. For less lubricated conditions, leather or PTFE seals offer better performance.

Need help deciding on the right oil seal? The Simply Seals team is here to assist!

Discover the Perfect Oil Seal with Simply Seals!

With a wide range of expertly designed oil seals crafted from various materials, selecting the right one for your machinery can be daunting.

The Totally Seals team is ready to help you choose the optimal style, material, and size for anything from commercial machinery to hobby car building.

Contact us today to ensure you select the proper rotary shaft seal that will safeguard your components and extend the life of your machines!

The company is the world’s best Tc Rubber Seal supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.