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17x40x7 seal
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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

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The fire door bottom brush strip acts as a barrier, effectively sealing this gap. Made from materials that can withstand high temperatures without combusting or melting, it prevents flames, smoke, and harmful gases from passing through. Additionally, it helps maintain the pressure differential between compartments, which is essential for keeping fire contained within a specific area Additionally, it helps maintain the pressure differential between compartments, which is essential for keeping fire contained within a specific area
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fire door bottom brush strip. This not only slows down the fire's progression but also gives occupants precious time to evacuate safely.

