Systems and methods for valve sealing
First Claim
Patent Images
1. A valve sealing system for use in an unheading or isolation valve in a petroleum refining process, said sealing system comprising:
- a seat base structure fixably attached to a main body of said valve;
a dynamic seat movably attached to said seat base structure such that said dynamic seat can move with the contour of a valve blind;
a bellows seal attached to said seat base structure and said dynamic seat such that said bellows seal can flex with the movement of said dynamic seat while maintaining a seal between said seat base structure and said dynamic seat;
at least one restrictor for restricting the movement of said dynamic seat relative to said seat base structure wherein said restrictor restricts movement of said dynamic seat in a direction away from said seat base structure; and
wherein said restrictor further restricts motion of said dynamic seat in a direction toward said seat base structure.
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Abstract
A system for sealing an unheading or isolation valve in a petroleum refining process. A bellows seal for preventing leakage of petroleum product and steam within the valve that is attached to a seat base structure and a dynamic seat that can move with the contour of a valve blind. A restrictor for restricting the motion of a dynamic seat relative to a seat base structure in a direction away from and towards the seat base structure.
11 Citations
10 Claims
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1. A valve sealing system for use in an unheading or isolation valve in a petroleum refining process, said sealing system comprising:
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a seat base structure fixably attached to a main body of said valve; a dynamic seat movably attached to said seat base structure such that said dynamic seat can move with the contour of a valve blind; a bellows seal attached to said seat base structure and said dynamic seat such that said bellows seal can flex with the movement of said dynamic seat while maintaining a seal between said seat base structure and said dynamic seat; at least one restrictor for restricting the movement of said dynamic seat relative to said seat base structure wherein said restrictor restricts movement of said dynamic seat in a direction away from said seat base structure; and wherein said restrictor further restricts motion of said dynamic seat in a direction toward said seat base structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification