Pressure control for partial stroke tests

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专利权人:

FISHER CONTROLS INTERNATIONAL LLC

发明人:

Junk Kenneth W.

申请号：

US201615066495

公开号：

US9611873(B2)

申请日:

2016.03.10

申请国别(地区):

美国

年份:

2017

代理人:

Marshall, Gerstein & Borun LLP

摘要：

A method of testing a valve actuator coupled to a process control device includes the steps of: controlling, with the process control device, a pressure within the valve actuator to ramp from an initial pressure towards a pre-determined pressure limit; monitoring a position of the valve actuator to detect a travel of the valve actuator; and upon one of the pressure within the valve actuator reaching the pre-determined pressure limit or detecting the travel of the valve actuator, controlling the pressure within the valve actuator to return to the initial pressure.

来源网站：

中国工程科技知识中心

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http://www.ckcest.cn/home/