How to Install John Crane’s T4111 in 7 Simple Steps | John Crane

How to Install John Crane’s T4111 in 7 Simple Steps

October 9, 2019 | 1 minute read

The T4111 is a revolutionary new single-use cartridge seal that simplifies the sealing process for applications using aqueous solutions, making it suitable for industries such as wastewater treatment, food and beverage, and mining. It is recommended for use on centrifugal and rotary pumps, and similar rotary shaft equipment.

The name was derived from the total cost of repair. When considering the expense of shipping, handling and inventory management, in many cases it is more economical to purchase a new seal than repair it.

The T4111 cartridge seal bridges the gap between functionality and cost, making it a sensible option to replace certain component seals or upgrade from packing. It is a practical solution for small, lower-duty pumps that conform to ANSI and DIN standards.

Using proven sealing technologies and design features, T4111 reduces installation times by at least 50%, and reduces lifetime costs by up to 20 to 30% when compared to typical elastomer bellows component seals or traditional packing options. In addition, the cartridge design and material selections reduce installation costs, lower maintenance requirements and optimize equipment performance.

In addition to the T4111’s proven performance benefits, it installs in less than four minutes.

Curious to see just how quick the installation process is? Check out the video below that details the entire process from start to finish.


Before any work can commence you should complete a risk assessment and method statement for the work you are going to carry out. Also, be sure equipment is within tolerances stated on fitting and maintenance instructions. Complete installation steps are as follows:

  1. Read instructions
  2. Check seal for any obvious signs of damage
  3. Slide T4111 onto shaft
  4. Fit backplate
  5. Tighten T4111 gland plate to the seal chamber
  6. Tighten screws except for two set screws holding assembly together (indicated by scribed line on drive collar) 
  7. Rotate shaft to ensure impeller is not binding on backplate 
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