Replacement of the fuel oil pump’s cartridge seal
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Several pictures of the process of replacing the canned mechanical seal on the fuel oil pump: lol
I just disassembled this type of pump today; this mechanical seal is of the bellows type, right? I also have a spring-type one here, but we mixed up these two types:L
It’s from the bellows type, made by Dandong Klon: lol
The assembly of modular mechanical seals is relatively simple: D
The compression amounts for installing a bellows-type mechanical seal are different between new and used units, and it is necessary to adjust and measure the compression ratio after using it for a while.
Is it because the bellows seals produced by different companies vary?
This type of mechanical seal does not have a drive ring; the axial position of the shaft sleeve is determined by the steps on the pump shaft. The degree of compression of the bellows depends on the relative positions of the pump shaft steps and the surface of the seal cover. The positioning block serves only as a preliminary positioning element, so it does not constitute a true modular seal, and API682 does not recognize it as such a seal.
One additional structural diagram of the fuel oil pump: lol
@7th floor~~Correct! No need to elaborate further.
This post was last edited by wqszgl on 2018-3-27 at 21:42. Indeed, there is no drive ring; transmission is achieved through keys. However, the compression amount of the bellows did not change after the positioning block was removed, remaining consistent with the value set by the manufacturer. Additionally, the axial position of the machine seal sleeve did not change after installation was completed.
When designing a seal of this type, it is necessary to know the exact axial dimensions.