The design of high pressure rotary seals considers several key factors, including the type of fluid being sealed, operating temperature, pressure, and the speed of rotation. Typically, they are made from advanced materials like elastomers, PTFE (polytetrafluoroethylene), and specialty composites that can endure extreme conditions. The seal's design often incorporates a lip that makes contact with the rotating shaft, creating a barrier against the pressure.
A well-known example of agricultural seals is the USDA Organic seal. This certification assures consumers that the products are grown without synthetic fertilizers or pesticides, promoting environmental sustainability. Similarly, GlobalGAP (Good Agricultural Practices) certification ensures that farming practices adhere to safety, environmental, and social responsibility standards. These seals not only reflect the commitment of farmers to quality and safety but also enhance marketability, as consumers are increasingly seeking products that align with their values.
The performance of high pressure hydraulic shaft seals largely depends on the materials used in their construction. Common materials include nitrile rubber (NBR), fluorocarbon (FKM), polyurethane (PU), and PTFE (Teflon). Each material has unique properties that make it suitable for specific temperature ranges, chemical exposures, and pressure levels.