Cartridge Seals

FSA Knowledge Series

DISCLAIMER

While the FSA makes every reasonable attempt to ensure that the information contained in this document is accurate and current, the FSA, its officers, directors, volunteers, and authorized agents are not responsible for any errors or omissions contained therein nor are they responsible for any results obtained from the use of or reliance upon its content. All information is provided “AS IS,” with no guarantee of completeness, accuracy, timeliness or of the results obtained, and without warranty of any kind, express or implied. In no event shall FSA or its officers, directors, volunteers, or authorized agents be liable to you or anyone else for any decision made or action taken in reliance on the information con tained herein or for any for any consequential, indirect, special, or similar damages, even if advised of the possibility of such damages. The informa tion contained in this document is for informational purposes only and does not constitute professional advice. It also includes references to certa in standards that may change over time and should be interpreted only in light of particular circumstances. It is your sole responsibility to confi rm the current state of any referred to standards. FSA reserves the right to modify or update the document content and to modify this Disclaimer at any t ime, effective upon posting of an updated version of this Disclaimer.

© (April, 2023), Fluid Sealing Association. All Rights Reserved.

This Fluid Sealing Association Knowledge Series training presentation introduces cartridge seals. This section includes:

▪ A typical cartridge seal

▪ Cartridge seal features

▪ Cartridge seal advantage and disadvantages

▪ Cartridge seal assembly

Cartridge Seal Overview

▪ A cartridge seal has the seal’s rotating and stationary assemblies unitized into one assembly

▪ Setting spacers preset the relative position of the rotating components to the stationary components, i.e.: no measurements are needed during installation.

▪ They are factory assembled and integrity tested

▪ The seals working length and spring load are preset

▪ They are easy to install

▪ Available in a variety of materials and configurations, including single and dual seals

▪ More costly when compared to component (non-cartridge) seals

Cartridge Seal Additional Advantages

Other cartridge seal advantages include:

▪ Hydraulically balanced and provide maximum interchangeability in pumps and other equipment, like mixers, without equipment modification

▪ Equipment shaft fretting and wear due to sealing components are eliminated, as all wearing surfaces are within the cartridge

▪ The bolt circles or slots in the gland are designed to fit most popular pumps and flush ports are provided in the gland for ease of connection to the appropriate piping plan

Cartridge Seal Installation

▪ Cartridge seal installs onto shaft as an assembled unit versus component seals which require stationary and rotary components/sub-assemblies to be positioned and installed separately

Cartridge Seal (pump impeller and back cover removed as part of installation process)