Flow control valve orientation issue
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In our unit, the direction of the cold hydrogen flow control valve for the reactor bed is set to high inlet and low outlet – is this incorrect?
Flow-blocking valves have high inlet and low outlet; for valves subject to severe cavitation, flow-blocking types should be chosen.
Is the flow-blocking type mentioned upstairs a wind shut-off valve?
The high-in-low-out configuration is applicable to high-pressure valves; in this case, the torque required to close the valve stem is much smaller compared to that when using a low-in-high-out configuration. With only the force of the medium acting, and no sealing force involved, sealing becomes easier. When the valve stem of a globe valve comes loose, the high-in-low-out design prevents leakage of the medium. The only downside is that the filler is subjected to stress when closed, making it prone to damage.
Excuse me, what is the difference between a flow-blocking valve and an air shut-off valve?
There is http://bbs.**.net/thread-74742-1-1.html in the forum