Diagnostic apparatus and method for fluid control valves
Patent
·
OSTI ID:5148159
This patent describes apparatus for diagnostically testing and determining the operating condition of a pneumatically operated fluid control valve, the valve having a pneumatic actuator interconnected to a valve flow control member for moving the flow control member between respective closed and open valve positions with respect to a valve seat, and a variable pneumatic pressure line connected to a valve positioner providing a variable pneumatic pressure output to the input of the pneumatic actuator for operating the valve in a test operation cycle defined by moving the flow control member along at least a portion of the movement between the respective closed and open valve positions. This patent also describes a method for diagnostically testing and determining the operating condition of a pneumatically operated fluid control valve having a valve actuator connected to a valve flow control member for a movement between respective closed and open valve positions with respect to a valve seat.
- Assignee:
- Fisher Controls Intl. Inc., Clayton, MO (USA)
- Patent Number(s):
- A; US 4976144
- Application Number:
- PPN: US 7-512095
- OSTI ID:
- 5148159
- Country of Publication:
- United States
- Language:
- English
Similar Records
Dual hydraulic safety valve
Large bore retrievable well safety valve
Self closing equalizing valve for a subsurface well safety valve
Patent
·
Tue Jun 13 00:00:00 EDT 1989
·
OSTI ID:5696935
Large bore retrievable well safety valve
Patent
·
Tue Aug 08 00:00:00 EDT 1989
·
OSTI ID:5323149
Self closing equalizing valve for a subsurface well safety valve
Patent
·
Mon Feb 01 23:00:00 EST 1988
·
OSTI ID:5287981