Hebei Hankai inner hub seal
Oil seals work by creating a tight seal around the rotating shaft. This prevents oil and other fluids from escaping while allowing the shaft to rotate smoothly. The seal is usually made up of a lip that fits snugly against the shaft, preventing any leaks from occurring. Some oil seals also have additional features, such as springs or gaskets, to provide extra support and ensure a secure fit.
oil seal for rotating shaft

Gate valve wheels are made from a variety of materials, including brass, stainless steel, and cast iron, depending on the application and environmental conditions. The choice of material affects the durability, corrosion resistance, and overall performance of the wheel. For instance, stainless steel wheels are often used in corrosive environments due to their resistance to rust and degradation.
gate valve wheel
