公开(公告)号：WO2023048990A1

公开(公告)日：2023-03-30

申请号：PCT/US2022/043341

申请日：2022-09-13

Applicant: FLOWSERVE MANAGEMENT COMPANY

Inventor： PARISH, Paul Jeffrey ,  NELSON, Michael P.

IPC: F16K25/04 ,  F16K1/52 ,  F16K17/02 ,  F16K37/00 ,  F16K49/00

Abstract: A valve system for controlling a corrosive process liquid flow, while avoiding corrosion due to a liquid/vapor interface of the process liquid, causes the process liquid to flow from the valve through a purge port into a vertical segment of a purge line. During valve initialization, a non-reactive gas backpressure within the purge line is controlled to establish the liquid/vapor interface at a desired height within the vertical segment, as determined by an interface level sensor, which can be ultrasonic. The vertical segment is constructed from, or lined with, a material that can withstand contact with the liquid/vapor interface. During valve operation, the non-reactive gas pressure can continue to be regulated, or a purge valve can be shut, trapping a fixed quantity of the non-reactive gas within the purge line. The valve can include a heater configured to prevent a molten process liquid from solidifying within the valve.

公开(公告)号：WO2023048991A1

公开(公告)日：2023-03-30

申请号：PCT/US2022/043345

申请日：2022-09-13

Applicant: FLOWSERVE MANAGEMENT COMPANY

Inventor： PARISH, Paul Jeffrey ,  NELSON, Michael P.

IPC: G01L19/06 ,  G01L19/00 ,  G01L19/08 ,  G01F1/34 ,  G01F15/00 ,  G01K13/02 ,  G01D21/02 ,  G05D7/06

Abstract: An apparatus for measuring a pressure of a corrosive or high temperature process liquid includes a pressure sensor in communication with the process liquid via a vertical tube. A buffer gas injected into the vertical tube forms a liquid/gas interface at a desired height. The buffer gas supply is then either isolated or regulated so as to cause the buffer gas pressure within the vertical tube to remain equal with the process liquid pressure. The pressure sensor indirectly measures the process liquid pressure by measuring the buffer gas pressure within the vertical tube, while remaining chemically and thermally protected from the process liquid. In embodiments, pressure measurements from a pair of gas buffered pressure sensors located upstream and downstream of a valve are combined with measurements of the process liquid temperature to determine a flow rate of the process liquid through the valve.

公开(公告)号：WO2023048989A1

公开(公告)日：2023-03-30

申请号：PCT/US2022/043337

申请日：2022-09-13

Applicant: FLOWSERVE MANAGEMENT COMPANY

Inventor： PARISH, Paul Jeffrey ,  NELSON, Michael P.

IPC: F16K31/126 ,  F16K17/02 ,  F16K1/46 ,  F16K1/52 ,  F16K1/42 ,  F16K37/00 ,  F16K49/00

Abstract: A bellows seal valve includes a pressurization port that can be used to apply a compensating pressure to the "atmosphere" side of the bellows, i.e. the side of the bellows that is opposite to the process fluid. The atmosphere side can be on the interior or exterior of the bellows. The compensating pressure can be greater than the process fluid pressure, to ensure that any leakage will be of pressurizing fluid into the process fluid or into the environment, and that no process fluid will escape into the environment. The pressure or flow rate of the pressurizing fluid can be monitored to detect bellows and packing leaks. A pressurizing fluid exit port can be provided, so that the pressurizing fluid can be circulated through the valve, thereby moderating the bellows temperature under conditions of extreme process fluid temperature.