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Worksheet to help you Correctly Identify Your Seal - CLICK HERE
1. Remove seal to be replaced from the motor shaft and/or sleeve.
2. Make note of materials used for the old seal parts.
3. Identify Head Type [  ] and use caliper to measure inside diameter (I.D.) and outside diameter (O.D.)

SEAL HEADS - Type A and Type B

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Identify Head Type -  Determine shaft  size:

Measure inside diameter (I.D.) (A)
Measure outside diameter (O.D.) (B)

The operating height is generally the same for all A and B seals of the same shaft size. More positive identification will result from calculating the seat dimensions following.

 

SEAL HEADS - Type C, D and E

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Identify Head Type -  Determine shaft  size:
Measure inside diameter (I.D.) of the rubber bellows (A) and add approximately .016” to compensate for rubber compression.
Measure the head O.D. (B)

STEP 1 Measure the total length (C) of the rotating portion of the assembled seal. (DO NOT include the seat)
STEP 2 Disassemble seal and measure the free length of the spring (D).
STEP 3 Take half of the measurement in STEP 2
STEP 4 Subtract the figure obtained in STEP 3 from the measurement (C) in STEP 1.

The result is the APPROXIMATE operating height of the seal.

 

SEAL HEADS - Type K, R and T

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Identify Head Type -  Determine shaft  size:

Measure inside diameter (I.D.) of the rubber bellows (A) and add approximately .016” to compensate for rubber compression.
Measure the head O.D. (B)

Calculate the operating height as follows:

STEP 1  Measure the total length (C) of the rotating portion of the assembled seal. (DO NOT include the seat)
STEP 2 Multiply the total length (C) by .730. The result is the APPROXIMATE operating height of the seal.

 

SEAT and GASKET

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Identify Seat Type

Measure the O.D of the gasket while assembled on seat ring and subtract approx. .016” to compensate for rubber compression (D)
Measure the combined seat and gasket thickness (E)

NOTE: It is very important to note the operating temperatures and environment details. This will determine the proper gasket material.

NEXT -  Environment Determines Seal Type