Systems and methods for single piece integrated seat
An one-piece integrated coke drum de-heading seat machined from a single forced metal block. The seat has bias members and expansion chambers stacked and aligned to increase the load force from about 250 PSI to over 850 PSI when activated by gasses.
1. A valve seat comprising:
a wall with an inward facing surface facing a flow way, the inward facing surface comprising a plurality of interior expansion chambers formed in the inward facing surface wherein the interior expansion chambers are configured to axially expand when pressure from coking process flowing through the flow way builds in the flow way;
an outward facing surface facing a steam chamber, the outward facing surface comprising a plurality of exterior expansion chambers formed in the outward facing surface wherein the exterior expansion chambers are configured to axially expand as steam pressure builds in the steam chamber; and
wherein the interior expansion chambers are configured to be activated independently of the exterior expansion chamber.
2. A valve seat comprising:
a wall dividing an exterior steam chamber and an interior flow way wherein the wall facing the steam chamber comprises a plurality of exterior expansion chambers and the wall facing the interior flow way comprises a plurality of interior expansion chambers wherein the exterior expansion chambers and the interior expansion chambers are configured to be activated by steam independently of the exterior expansion chamber that are configured to be activated by process pressure; and
wherein the expansion chambers are stacked so as to substantially overlap and configured to complimentary create an axially expanding force.
3. The valve seat as set forth in claim 2 , further comprising a first bias member having a first side comprising a gate-facing surface, a portion of which is configured to seal against a gate and a second side forming a portion of the first expansion chamber;
a second bias member wherein a first side of the second bias member forms a portion of a first expansion chamber and a second side forms a portion of the exterior steam chamber;
a third bias member comprising a first side forming a portion of the second bias member and a second side forming a portion of a second expansion chamber; and
wherein the first bias member, the second bias member and the third bias member are configured to cooperatively act to axially bias the valve seat.
4. The valve seat as set forth in claim 3 , wherein a least a portion of the first expansion chamber distal wall is configured to flex when activated by process pressure.
5. The valve seat as set forth in claim 2 , wherein an area of the valve seat which is configured to minimize the area of contact with the gate to increase a pressure load on the gate to improve the seal between the surface and the gate.
6. The valve seat of claim 2 , wherein the valve seat is configured to selectively receive a load as a gate deforms.