Process Engineering Division – Instrumentation and Automation Technology Exchange Forum – Daily Question – Questions 11–27

2019-11-27View Original

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This post was last edited by It will be better tomorrow on 2019-11-27 08:22. Process Engineering Section – Instrumentation and Automation Technology Discussion Forum – Daily Question – Questions 11–27. Multiple-choice question: For a flow-shutting type pneumatic thin-diaphragm single-seat valve with the valve body installed in reverse orientation and an actuator of positive action, regarding the reasons why it cannot be fully closed, which of the following statements are correct? (Multiple selection) A. Leakage in the control valve diaphragm head. B. The valve stem is too long. C. The pressure difference before and after the control valve is too large. D. The pre-tensioning force of the zero-point spring is too low

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Process Engineering Division – Instrumentation and Automation Technology Exchange Forum – Daily Question – Questions 11–27

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