Systems and methods for purging an isolation valve with a liquid purge medium
AssigneeTapcoEnpro, LLC
InventorFiliberto Jimenez
Life of this patent
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Abstract
An isolation valve purge system for an isolation valve, with internal components configured to isolate the flow of process fluid through the bottom slurry circuit line. In some embodiments the isolation valve is purged using a liquid purge medium created in the fractionation tower, such as a hydrocarbons, oils of different viscosity or a combination of hydrocarbons. A method for reducing cavitation in a pressurized line by using a hydrocarbon from the fractionation tower to purge an isolation valve process fluid flowing therethrough with a liquid purge medium.
Claims19
An isolation valve for controlling a flow of a process fluid, the isolation valve comprising:
- a bonnet;
- a valve body coupled to the bonnet, wherein when the valve body is filled with a liquid purge medium, the liquid purge medium creates a positive pressure to inhibit the process fluid from entering the valve body;
- a blind disposed at least partially within the valve body, the blind coupled to an actuator for actuating the blind between an open configuration and a closed configuration;
- and
- a seat comprising a purge liquid chamber, wherein when the purge liquid chamber is filled with the liquid purge medium, the purge liquid chamber expands to create a biasing force that presses the seat against the blind, thereby creating a seal between the seat and the blind.
A valve system comprising:
- a valve body;
- a bonnet;
- a blind;
- a seat comprising:
- a seat body;
- a floating seat plate configured to articulate independently of the seat body;
- and
- a biasing member that creates a seal between the seat and the blind wherein the valve system further comprises a liquid purge medium kept under positive pressure in the valve body to continually force the liquid purge medium out of the valve body and into a valve opening to prevent a process fluid from entering the bonnet or the valve body.
Dependencies are inferred from the claim text.