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Recent content by RHurst
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High teperature rotary seal
You should contact a mechanical seal vendor and explain to them what you have. This will certainly be a heavily engineered solution due to the temperatures.- RHurst
- Post #3
- Forum: Mechanical Seal engineering
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Leakage from Leak Detection port of Double seal.
If your seal pot (siphon pot as you described) stays at a constant 42kg/cm^2 (~597 psi) then the differential pressure on your outboard seal face is also constant. If you are leaking barrier fluid (duraclear) to the atmosphere during your transfer then it is likely due to some dynamic going on...- RHurst
- Post #2
- Forum: Mechanical Seal engineering
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Selecting mechanical seal cooling/flash plan (Seawater Service)
There are a lot of factors that dictate what API piping plans are required for reliable seal operation. To understand if we need a flush to cool the seal we would need to understand what the seal generated heat would be as well as some other fluid properties to determine if lubricity is going...- RHurst
- Post #3
- Forum: Pump engineering
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Seal selection.
Well, I should start by saying that the 23 m/s (~75 ft/s) is not TOTAL gospel with regards to seal design. Some seal designs have a lower surface speed threshold, while there are others (such as sundyne seals) that are far greater. I will say that we tend to be concerned in certain...- RHurst
- Post #2
- Forum: Mechanical Seal engineering
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minimum thickness of seal face
This most certainly depends on your seal design. Generally it is a good idea to contact your manufacturer and discuss your options. Carbon faces are cheap considering the overall equipment costs. If you are having other issues with the sealing arrangement that is prompting you to question the...- RHurst
- Post #2
- Forum: Mechanical Seal engineering
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Molten Sulphur Pump: Premature Mechanical Seal Failure
Crradovan, To answer your question, yes, mechanical seals can be designed to include additional flush ports (NPT) so that a temperature indicator can be installed. However, I have found that you get more bang for your buck if your pump allows for an NPT connection into the stuffing box (often...- RHurst
- Post #11
- Forum: Mechanical Seal engineering
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Anti Rotation Pin comes out of In Board Stationary Face.
From the drawing it appears that the inboard stationary face is retained, so it should not move axially even during reverse pressurization. I would work with the seal manufacturer to understand if the housing and stationary face design are accurate. Additionally, the pin should be a pretty...- RHurst
- Post #5
- Forum: Mechanical Seal engineering
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Molten Sulphur Pump: Premature Mechanical Seal Failure
JJPellin has it right. Unless it's a safety regulation at your site, I almost always recommend utilizing a single seal with a plan 02/62. Dual seal plans (including those for gas seals) in hot applications such as molten sulfur tend to act as heat sinks for the mechanical seal, even at ambient...- RHurst
- Post #7
- Forum: Mechanical Seal engineering
