Sticky O-ring
Sticky O-ring
(OP)
Excuse my lack of O-ring design experience, but we are currently using an EPDM o-ring on a Polyester (PBT) housing, in which either a Polycarbonate (PC) or PBT lid gets screwed onto. The O-ring is a radial seal and is designed to have between 8-25% compression. I should also add that we are using a Molycote #44 lubricant that is compatible with EPFDM. The problem comes when the lids are screwed down on the housing, they go on very nice, but when left for a day or two they are very difficult (Sticky) to remove the lids.
Has anyone else experienced something similar and had a successful resolution?
Has anyone else experienced something similar and had a successful resolution?





RE: Sticky O-ring
Radial seal to me means the o-ring is trapped between two cylinders. That can be a tricky part to disassemble at any time. We have added a thread in our covers to allow a pull ring to be threaded in to aid disassembly. I've also seen push threads (through threads in the cover) that allow a screw to be threaded in and bear on the mating flange to push the cover out. Even a screwdriver pry slot or two might help.