Systems and Methods for a Valve and a Valve Assembly
AssigneeEmerson Automation Solutions Final Control US LP
InventorsChen Jing, Chen Yuanyuan, Li Chen Chen, Nalinkumar Rajput, Vishwa Kalyanasundaram
Life of this patent
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Abstract
A spring-operated relief valve can include a main spring positioned between a bottom spring seat and a top spring seat. A seat assembly can include a valve seat, a seat retainer, and a spindle. The valve seat and the spindle can be received within an inner bore of the seat retainer and the spindle and the seat retainer can be threadably coupled. The valve seat can extend partially through the seat retainer to form a seal with a nozzle of the spring-operated relief valve and the spindle can engage the bottom spring seat to compress the main spring during a valve relief event.
Claims20
A spring-operated relief valve comprising:
- a valve body;
- a nozzle with a nozzle sealing surface;
- a main spring positioned between a bottom spring seat and a top spring seat;
- a valve seat configured to form a seal with the nozzle sealing surface when the spring-operated relief valve is in a closed orientation;
- a spindle having a distal end and a proximal end, the distal end arranged to urge the bottom spring seat toward the top spring seat as the valve seat is moved away from the nozzle during a valve relief event to compress the main spring between the bottom spring seat and the top spring seat;
- and
- a seat retainer having an inner bore that receives the valve seat and threadably receives the proximal end of the spindle to couple the spindle to the seat retainer and axially secure the valve seat within the inner bore, with a sealing end of the valve seat extending out of the inner bore at a sealing end of the seat retainer.
A valve seat assembly for a spring-operated relief valve, the valve seat assembly comprising:
- a valve seat that includes a sealing end with a first diameter and a sealing surface, and a body with a second diameter that is larger than the first diameter;
- a seat retainer having an inner bore with a bore diameter sized to receive the body of the valve seat, the inner bore extending between a first opening at a spindle end of the seat retainer and a second opening defined by an annular projection at a sealing end of the seat retainer;
- and
- a spindle threadably secured in the inner bore;
- wherein the valve seat is received within the inner bore, with the body of the valve seat seated on the annular projection of the seat retainer and the sealing end of the valve seat extending through the second opening to expose the sealing surface outside of the inner bore;
- and
- wherein the spindle axially retains the valve seat within the inner bore, with the body of the valve seat seated on the annular projection at the sealing end of the seat retainer.
A method of assembling or retrofitting a valve with a valve seat subassembly, the method comprising:
- forming the valve seat subassembly by:
- inserting a valve seat through a first opening into an inner bore of a seat retainer so that a sealing end of the valve seat extends into a second opening at a sealing end of the inner bore of the seat retainer;
- threading a proximal end of a spindle into the first opening of the inner bore of the seat retainer to axially secure the valve seat within the inner bore;
- arranging, in a valve body of a valve:
- a bottom spring seat, a spring seated on the bottom spring seat, and a nozzle with a sealing surface;
- and
- inserting the valve seat subassembly into the valve body so that:
- the sealing end of the valve seat is arranged to form a seal with a sealing surface of a nozzle of the valve when the valve is in a closed orientation;
- and
- a distal end of the spindle is arranged to receive spring force from a biasing spring of the valve to urge the valve seat subassembly toward the sealing surface of the nozzle.
Dependencies are inferred from the claim text.