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The Chesterton 450 is a mechanical seal developed by the American manufacturer A.W. Chesterton, engineered to handle high pressures and temperatures in rotating industrial equipment.
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The Chesterton 440 is a nonmetallic external single mechanical seal produced by A.W. Chesterton for rotating equipment. Chesterton describes the 440 as a component seal for general chemical applications, with a design intended for fluids that can attack standard seal materials and expensive alloy co...
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