Re: Sliding ring seal of Calpeda pump



If you are referring to the 12mm seal pictured below, yes, it is fairly standard. I bought several at a sidewalk shop in Penang, Malaysia. Just make sure it is made of stainless steel. Failure to replace the seal will ruin the motor as saltwater will enter the electric components.
Below is a Calpeda Pump motor ruined by saltwater because of a failed mechanical seal:

If you are referring to the "Sling Washer," its purpose is to try to mitigate saltwater from a leaking mechanical seal from getting into the pump motor and ruining it. The sling washer will mitigate some of the saltwater, but not all of it.


It is possible that you will not see or understand some of the tell-tale indications of a leaking mechanical seal because of what the sling washer does. It will throw the salwater away from the pump shaft. In the photo below, you will see a line of rust on the stainless steel freshwater accumulator tank. This line of rust got there because of the sling washer.

Lastly, here are the instructions for replacing the mechanical seal:

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On Sun, Jul 25, 2021 at 3:51 AM Martin Birkhoff <mbirkhoff@...> wrote:

Dear Amelians,
the sliding ring seal of our Calpeda pump (aircon) is leaking badly. The original spare part number is 035750.
Does anyone know if this sliding ring seal is a standard industrial seal?

If so, any idea where to get one?   


Mago del Sur - 54#40
currently Fuengirola, Spain

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