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Indentifying Your Mechanical Seal


The illustrations below demonstrate the correct procedure of measuring and properly identifying a mechanical seal that is best suited
to the application of your needs.
  Compare and identify seal Head Type from the Head Type list.

Head Type A

Head Type B

Head Type C

Head Type D

Head Type E

Head Type K

Head Type R

Head Type S

Head Type T

Head Type U

Head Type V

  Compare and identify Seat Type from the Seat Type list.

Seat Type 1

Seat Type 2

Seat Type 3

Seat Type 5

Seat Type 8

Seat Type 9

Seat Type 11

Seat Type 15

Seat Type 17

Seat Type 18

Seat Type 25

Seat Type 27

Seat Type 'Special'



  Measuring the I.D. (inside diameter) of your seal:
  Measuring the O.D. (outside diametere) of your seal:









  Measuring the height of your mechanical seal:







  • Types A & B:
    Measure height of seal Head = OP HT x 0.73

  • Types C, D, E & U:
    Measure spring and seal Head / 2 = OP HT

  • Types K, R, S, T, V:
    Measure both seal heads and spring x 0.5 = OP HT

* Please note: Do not include seat height measurements.




  Through a process of elimination, match the types and measurement gathered in steps 1 – 5 to determine mechanical seal part number from size chart.