Modular System is Sealtek’s signature line of cartridge-mounted mechanical seals. By using the same parts to assemble several different models, Sealtek® is able to offer any seal among the standard sizes and materials with immediate, offthe-shelf delivery. At the same time, the modular components enable the end user to lower the stock of spare parts, as the same repair kit can be applied to a large number of seal models of the same size.