After the New Year, I’ll come to Haichuan to study again*
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First, I would like to wish everyone a happy retirement; may you all have a joyful life in your old age! Hehe! As soon as I got back home, I rushed to start the water integration testing of the system; it’s only today that I came to Haichuan to give you all a progress report. Upon returning, the catalytic lining is being inspected; overall it’s in good condition. Right now we’re fixing and repairing it. Instrument calibration is in progress, and the indoor and outdoor calibration of the self-protection system will begin next week. There are still many tasks to be done; if there’s anything that requires help, please let everyone know right away! I would like to ask everyone a question first. For control valves that rotate eccentrically, the control characteristics seem not to be very good during water testing; they are not linear. Has anyone used such valves and what are their experiences?
We use FLOWSERVE eccentric rotary valves. Initially, we used a domestically produced model from Shanghai, but we found that its performance was not very good – it didn’t function properly at flow rates of 1% to 4%, and it reached its maximum flow rate around 35% to 45%； I have discussed this with the instrumentation team; the spool of the eccentric rotary valve determines its operational linearity ； However, for heavy oil or oil with impurities, an eccentric rotary valve is the best choice.