遇到如下问题不知该如何计算 . Q+ U; H3 c7 N g5 ]0 S( h请达人指教 & W0 b' q1 V/ F+ [have some requests more about needle valves :+ \5 E4 P: v) r- L( G! ?1 c- e/ p
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1 – What is the hole diameter the needle valves needs for a flow rate of 2500 litres/hour with a pressure of 4.2 bars. D4 W" _4 M, \9 \9 u: r7 `% i. W* w, m$ b
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2 – what is the flow rate for a hole diameter of 6.8mm with a pressure of 4.2 bars7 K3 X2 s+ `) c# |9 Z: [
what is the flow rate for a hole diameter of 8mm with a pressure of 4.2 bars3 H) P5 Q) W) O1 e/ u
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z- Z1 s' f' u & @9 y( [8 F; E3 o% j1.压力为4.2BAR，CV值是2500L/H的情况下，孔径是多少。9 w( K. h" Q( r1 D& i' Z
发表于 2006-4-25 17:47:12