Chesterton DirectFit Series—Single & Double Seals

Seals Designed to Fit Sulzer™* APP/APT and NPP/NPT Series Pumps


​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Chesterton DirectFit™ Series mechanical seals are designed to fit the Sulzer* APP/APT and NPP/NPT series process pumps, providing an easy and convenient upgrade in sealing performance without modification.

  • ​​​​​Incorporates the latest in seal face design technology to minimize heat generation and optimize performance in the most difficult process services
  • Ideal for paperstock, hot condensate, liquors, solvents, and evaporation services in a variety of industries

​* Sulzer Ltd. is in no way associated or affiliated with A.W. Chesterton Company. This reference to Sulzer pumps is intended solely to identify products of this other manufacturer for which A.W. Chesterton Company designed its DirectFit seals to be compatible.

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Chesterton DirectFit Series—Single & Double Seals Brochure


Chesterton DirectFit Series—Double Seals Installation Instruction


Chesterton DirectFit Series—Single Seals Installation Instruction