Patent ID: 9505982
Filing Date: 2016-11-29
CPC Classification: C10B,F16K

Claim Text:
1. A seat system of a deheading valve for use on a coke drum, the seat system comprising: a first seat assembly attached to a main body of the deheading valve; and a second seat assembly attached to the main body opposite the first seat assembly so that a blind can slide between the first and second seat assemblies to open and close the deheading valve, wherein the second seat assembly comprises: a seat that contacts the blind; a packing gland comprised of a plurality of split rings that each include a recess, the seat being secured to the packing gland; and a retainer secured to the main body, the retainer including a protrusion which inserts into the recess in each of the split rings of the packing gland, the protrusion being positioned to limit movement of the packing gland away from the retainer.