Mechanical Seals and The Managed Leak
All mechanical seals leak, but it’s a managed leak. We want to make sure that we can maintain if there is any environmental issues from that standpoint, and the customer also has to remember what the application is. Depending on what we are pumping, some fluids are a lot harder to seal than others. For example crude oil is very slick and very lubricating. It is a lot harder to seal than something that is like water. Water is non-lubricating, so it’s much easier to seal, whether we are talking about rendered pork fat, or whatever application it may be. We don’t want it to be an environmental issue from that standpoint, it doesn’t matter where it is — Chesterton, Burgmann, AES — all seals are designed to leak to a point.
If it’s an application where we can have zero leakage ideally for an environmental issue or something to that affect, a lot of times we will go to a seal-less design where we are having virtually no fluid that can ever pass. For instance, hydrofluoric acid is obviously an environmental issue, and we don’t want to have any leakage. The same goes with propane, liquefied natural gas. It’s very flammable and we don’t want to have any leaking, because it could cause an explosion. My solution would be to use a MacDrive where there is actually no fluid available to the atmosphere at all.
The important thing to remember is that yes, mechanical seals do leak, but they are managed leaks.
For more information, check out this video!