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遇到如下问题不知该如何计算: v# C% j) T8 \8 P$ w( `4 m
请达人指教( `; I; D/ L4 g( W
have some requests more about needle valves :, S' u- q, S/ p, y# M
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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.
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, O/ ?4 R, q9 ]2 – what is the flow rate for a hole diameter of 6.8mm with a pressure of 4.2 bars9 I$ L4 D& X# J# s
what is the flow rate for a hole diameter of 8mm with a pressure of 4.2 bars* G9 z+ N$ [) |2 q4 S+ X3 m1 l
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. ~: m! f! Q( y1.压力为4.2BAR，CV值是2500L/H的情况下，孔径是多少。$ c* U9 ]$ p X6 y! ~" k" t$ @
9 A9 j: I3 ]3 Y" U* v2．压力为4.2BAR，孔径为6.8MM，CV值是多少
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# q# p% p, Q) s( L. W( @; k 压力为4.2BAR，孔径为8MM，CV值是多少
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" q9 m6 R* T* |. r/ e[ 本帖最后由 userkypdy 于 2007-3-20 19:52 编辑 ] |
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发表于 2006-4-25 17:47:12