Invention Grant
- Patent Title: Methods and apparatus of assessing a test of a solenoid valve via a positioner
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Application No.: US15298726Application Date: 2016-10-20
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Publication No.: US10234058B2Publication Date: 2019-03-19
- Inventor: Kenneth Junk , Shannon Jelken
- Applicant: Fisher Controls International LLC
- Applicant Address: US IA Marshalltown
- Assignee: FISHER CONTROLS INTERNATIONAL LLC
- Current Assignee: FISHER CONTROLS INTERNATIONAL LLC
- Current Assignee Address: US IA Marshalltown
- Agency: Hanley, Flight & Zimmerman, LLC
- Main IPC: F16K37/00
- IPC: F16K37/00 ; F15B19/00 ; F16K11/044 ; F16K31/06 ; F15B20/00

Abstract:
Methods and apparatus of assessing a test of a solenoid valve via a positioner are disclosed. An example apparatus includes a solenoid valve to enable an actuator to close an emergency valve and a valve positioner fluidly and communicatively coupled to the solenoid valve. The valve positioner is to instruct the solenoid valve to transition the solenoid valve from a first state to a second state. The valve positioner is to monitor a pressure change of a pressure chamber of the actuator in fluid communication with the solenoid valve relative to an initial pressure for a monitoring duration. The valve positioner is to identify a maximum pressure change during the monitoring duration and determine a ready state of the solenoid valve when the maximum pressure change is greater than a minimum trip value and the pressure change at a monitoring end time is less than a maximum reset value.
Public/Granted literature
- US20180112797A1 METHODS AND APPARATUS OF ASSESSING A TEST OF A SOLENOID VALVE VIA A POSITIONER Public/Granted day:2018-04-26
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