NBR double lip rotary shaft seals are a specific type of rotary shaft seal designed with two sealing lips made of Nitrile Butadiene Rubber (NBR). These seals are commonly used to prevent the leakage of fluids or contaminants along the rotating shafts of machinery and equipment. The double lip design provides an extra layer of protection, enhancing the sealing efficiency and preventing the ingress of contaminants and the escape of fluids.

Here are some key features and characteristics of NBR double lip rotary shaft seals:

1. Nitrile Butadiene Rubber (NBR): NBR is a synthetic rubber known for its excellent oil and fuel resistance, making it a popular choice for sealing applications in which contact with petroleum-based products is common. NBR is also known for its good mechanical properties and durability.
2. Double Lip Design: These seals have two sealing lips instead of the more common single lip design. The double lip design provides an additional barrier, improving the sealing effectiveness and offering better protection against fluid leakage and contamination.
3. Dynamic Sealing: NBR double lip rotary shaft seals are designed for dynamic applications, where the shaft is in constant rotation. They maintain their seal even when the shaft is in motion.
4. Versatility: NBR double lip seals are used in a wide range of applications across various industries, including automotive, manufacturing, agriculture, and more.
5. Lubrication: Proper lubrication is important for the longevity and performance of NBR double lip seals. Lubrication helps reduce friction, heat generation, and wear on the sealing lips.
6. Temperature and Pressure Tolerance: The performance of NBR double lip seals is influenced by temperature and pressure. They are typically suitable for moderate temperature and pressure conditions, making them well-suited for many common applications.

These seals are commonly found in equipment such as pumps, gearboxes, motors, and various industrial machinery where the prevention of fluid leakage and the protection of the internal components from contamination are crucial. NBR double lip rotary shaft seals are cost-effective, reliable, and easy to install, making them a popular choice in many industries.