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Seal Identification

Here are a few ways we can help you identify which type of seal you have:

1) The Shaft Seal Data Sheet

  • Fill out and fax over our shaft seal data sheet.

application data sheet for shaft seals.PNG
comprehensive application data sheet.PNG

2) Comprehensive Data Sheet

  • Fill out and fax over our comprehensive data sheet.

3) Send it in

  • Simply pack up your seal and mail it to our shop at 164 B Yankee Park Rd, Fairfax, VT 05454


6) Common Rubber Bellows Shaft Seal Identification

Seal .JPG

4) Email us pictures of the seal

  • Simply email us photo's of the entire seal; top bottom and sides.

5) Comprehensive seal autopsy

  • Root cause of failure

  • The key to identifying these seals is how the head sits upon the spring.

  • Each will have unique head OD's.

  • Each will have different operating lengths.

  • To determine the correct Rubber Bellows Shaft Seal:

    • Identify the type​

    • Determine the shaft size

      • Measure the inside diameter of the Rubber Bellow. The dimensions will typically be slightly under the actual shaft diameter. This is what gives the Bellows the grip on the shaft.​

      • Measure the outside diameter of the rotary head.

    • Estimate the operating length

      • The best way to determine the operating height of a seal, if not given to you by the customer, is to obtain the axial dimension in the pump from the stationary face, back to the point where the seal "stops" against.​

      • If that is not possible, the approximate operating length can be found by adding 1/2 of the springs free length + the distance from the point of the rotary head where the spring makes contact out of the top of the seal face*.

      • *Note that this is a rough estimate of the working length. Please refer to the catalog for the actual operating length.

    • Determine the stationary:

      • Determine the type of stationary (cup mount, O-ring groove, block, etc.)​

      • Measure outside diameter. This will be slightly larger than the actual gland bore giving the seat the proper "squeeze" into the bore.

      • Measure thickness of the seat.

    • Determine the materials of construction of the seal:

      • Type of metal spring and component parts​

      • Rotary face material 

      • Type of rubber elastomer and cup/O-ring

    • Determining the correct Rubber Bellows Shaft Seal:

      • Translate your measurements and seal identification information to the actual seal part number​.

      • Most people use the U.S. Seal catalog to determine the industry standard part number.

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