We are seeing the “gaskets” on our rupture discs flake apart, looks similar to wet drywall, when it liberates it leaves the mounting hardware loose. Any other seeing anything similar? We have the Wartsila supplied FIKE rupture disc installed.
We call it wet toilet paper. Yes, we see the same thing. The material falls away leaving us with loose rupture disc fittings and the rupture disc vibrates itself to death.
However, the rupture disc only fails on the first off where we have the stack routing hot gasses away from the building. We have not had a single rupture disc fail anywhere else – where no stack is installed.
We theorize the stack is vibrating and putting stresses on the rupture disc resulting in a failure. An engineering firm is analyzing the theory for us right now.
Yes, we have the same issue. Our are gasketed with Frenzelit Isoplan 500, which is made of “biosoluble mineral fiber” per the Frenzelit website. We’ve painted the exposed portions when replacing the rupture disc assemblies and made up home-made rain covers for the flanges to keep the rain off, hoping to extend the life of the gaskets.
In my opinion, this is the wrong material for outdoor applications, especially here in Florida on peaking units that are offline most of the time