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HOW TO MEASURE MECHANICAL SEAL? Read More: Here are the measurement of a mechanical seal is a systematic process. It will be very essential to how measure mechanical seal right way. Website:


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A Guide By Leak-Pack

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 Measurement of a mechanical seal is a systematic process. Sometimes it is impossible to cross- reference a seal. What should be done to assure that the right seal is received for the pump  Experts say that it is vital to supply the information as accurately as possible. The two major rotating components of a seal are the spring and seal head.  The seal head should be removed from the spring to measure it accurately. The inside diameter needs to be measured on the back side of the seal head. It is the end that fits towards the spring.

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 Thus you will arrive at the seal size diameter. Remember it is either the sleeve size where the seal fits over or the shaft size.  In the majority of the seals the front side has a black carbon face which runs against the stationary portion known as the seat of the mechanical seal assembly.  Now you need to measure the spring length while it separates from the head of the seal. The next step is to measure the outside diameter and thickness of the seat or stationary.

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❖The elastomer or rubber part of the seal is made from Nitrile Buna-N or NBR. The exception is a process where the liquid is either some harsh chemical or high-temperature liquid. ❖The seat or stationary of the seal is made from which metal Is it some white and hard material Or is it made from metal ❖What is the shape of the seat and stationary parts in the mechanical seal you are measuring Does it contain an O- ring Or does it have a rubber piece which fits into the seal like a cup They are called cup mount type and O-ring mount type.

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 Other than finding out the sizing of the seal now it is time to know about the material the seal is made from. You are supposed to get the following information as well:  Is the rotating seal face made from carbon If it is black then it is most likely carbon.  Once you have all the information mentioned above you will be assured of getting the perfect seal assembly. It will fit right and function correctly.  If it is possible you can send the entire seal assembly so that the seal supplier can measure it and send the right replacement. However it can happen if you have a spare seal to run the operations well.

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