
high pressure shaft seals. These materials are often combined with advanced sealing technologies, such as spring-loaded designs or lip seals, to provide the necessary sealing power while minimizing friction and heat generation.
2. Age and Usage Understand the age of the equipment and how much it has been used. Older machines can still be valuable if they have been well-maintained; however, equipment that has seen heavy use may have a higher likelihood of requiring repairs soon after purchase.