US 11,713,818 B2
Decoking control valve using dynamic rod seal
Daniel Arzuaga, Hermosa Beach, CA (US); Hrishikesh Gadre, Long Beach, CA (US); and James T. McGuire, Fullerton, CA (US)
Assigned to Flowserve Management Company, Irving, TX (US)
Filed by Flowserve Management Company, Irving, TX (US)
Filed on Oct. 23, 2020, as Appl. No. 17/78,692.
Application 17/078,692 is a continuation of application No. 15/579,253, granted, now 10,816,095, previously published as PCT/US2016/035433, filed on Jun. 2, 2016.
Claims priority of provisional application 62/170,305, filed on Jun. 3, 2015.
Prior Publication US 2021/0041031 A1, Feb. 11, 2021
Int. Cl. F16K 3/34 (2006.01); F16K 3/316 (2006.01); C10B 33/00 (2006.01); F16K 47/08 (2006.01); F16K 3/24 (2006.01); F16K 11/07 (2006.01); F16J 15/3208 (2016.01); F16K 3/26 (2006.01); F16K 11/02 (2006.01)
CPC F16K 3/34 (2013.01) [C10B 33/006 (2013.01); F16J 15/3208 (2013.01); F16K 3/243 (2013.01); F16K 3/246 (2013.01); F16K 3/26 (2013.01); F16K 3/316 (2013.01); F16K 11/025 (2013.01); F16K 11/0712 (2013.01); F16K 11/0716 (2013.01); F16K 47/08 (2013.01); Y10T 137/86107 (2015.04); Y10T 137/86799 (2015.04); Y10T 137/86879 (2015.04); Y10T 137/87249 (2015.04)] 16 Claims
OG exemplary drawing
 
1. A control valve configured to selectively convey a pressurized decoking fluid to a decoking tool, the control valve comprising:
a cylinder defining an inlet port and a plurality of outlet ports;
a plurality of hydraulic rod seals each housed within a respective groove that is formed within a wall of the cylinder; and
a piston disposed within and arranged to travel within the axial dimension to allow selective fluid communication between the inlet port and the plurality of outlet ports, wherein:
the plurality of hydraulic rod seals are separated from one another therein by an axial dimension such that only one of the plurality of hydraulic rod seals is in contact with the piston at a time;
the piston, the cylinder and the plurality of hydraulic rod seals cooperative with one another during control valve operation to fluidly isolate the inlet port from one of the plurality of outlet ports, and
the piston further defining at least one flowpath formed therethrough such that during movement of the piston in response to differential axial pressure being applied thereto from the pressurized decoking fluid, the piston selectively engages with one of the plurality of hydraulic rod seals such that a portion of the pressurized decoking fluid flows through the at least one flowpath to substantially equalize an axial fluid pressure across such hydraulic rod seal.