US 11,746,925 B2
Valve packing ring set
Robert Garlock, Chardon, OH (US); Brian Biller, Chardon, OH (US); and Thom Jessup, Chardon, OH (US)
Filed by EGC Operating Company LLC, Chardon, OH (US)
Filed on Feb. 8, 2022, as Appl. No. 17/666,792.
Claims priority of provisional application 63/147,541, filed on Feb. 9, 2021.
Prior Publication US 2022/0252181 A1, Aug. 11, 2022
Int. Cl. F16J 15/3284 (2016.01); F16K 41/02 (2006.01)
CPC F16K 41/02 (2013.01) [F16J 15/3284 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A packing ring for a fluid valve comprising:
a top layer and a bottom layer, both the top layer and the bottom layer comprising a flexible graphite material; and
one or more mid-layers comprising the flexible graphite material or a perfluoroalkoxy alkane (PFA) material;
wherein the one or more mid-layers are disposed between the top layer and the bottom layer;
wherein respective one or more mid-layers are disposed parallel to an adjoining layer;
wherein the plurality of mid-layers, top layer, and bottom layer are bonded together forming a cylindrical shape; and
wherein the cylindrical shape comprises an open center, wherein the open center extends through the formed cylindrical shape, and has an axis perpendicular to the plurality of mid-layers, top layer, and bottom layer.