​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​This single cassette mechanical seal is engineered to meet the majority of plant-wide applications with excellent reliability. All wearing parts are contained in a single, replaceable cassette unit with a common, universal gland. Repairs involve only an exchange of cassettes.