Any drawback to a very smooth O-ring gland for static gaseous system?
Any drawback to a very smooth O-ring gland for static gaseous system?
(OP)
AS-5857A "GLAND DESIGN, O-RING AND OTHER ELASTOMERIC SEALS, STATIC APPLICATIONS", Table-6, page-37, lists 32 micro-inch max for O-ring groove dia & 63 micro-inch max for groove sides. It does not lists any restrictions on the min side.
Is anyone aware of any drawbacks for a radial, static O-ring seal in a gaseous system where the pressure difference across the seal does not exceed 1 atmosphere if the groove surface is very smooth [less than 1 micro-inch Ra]?
The squeeze is 27%; O-ring elastomer is butyl; 3.5 inch dia and 0.070 inch cross section
Is anyone aware of any drawbacks for a radial, static O-ring seal in a gaseous system where the pressure difference across the seal does not exceed 1 atmosphere if the groove surface is very smooth [less than 1 micro-inch Ra]?
The squeeze is 27%; O-ring elastomer is butyl; 3.5 inch dia and 0.070 inch cross section





RE: Any drawback to a very smooth O-ring gland for static gaseous system?
RE: Any drawback to a very smooth O-ring gland for static gaseous system?
RE: Any drawback to a very smooth O-ring gland for static gaseous system?
Dynamic glands generally should have some minimum for the dynamic surface to retain lubrication so as not to burn the seal.
Ted
RE: Any drawback to a very smooth O-ring gland for static gaseous system?
RE: Any drawback to a very smooth O-ring gland for static gaseous system?
Super smooth finish shouldn't hurt, but I've never worked with a gland _that_ smooth.
Mike Halloran
Pembroke Pines, FL, USA
RE: Any drawback to a very smooth O-ring gland for static gaseous system?
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: Any drawback to a very smooth O-ring gland for static gaseous system?