簡單介紹
上海市語言文字水平測試中心中線蝶閥防軸竄出設(shè)計(jì),防止外部污垢的進(jìn)入,潤滑支承軸套,閥體直接硫化閥座或有硬背壓入閥座.有效密封,小扭距和長壽命設(shè)計(jì)的閥板,精密加工的不銹鋼閥軸.花健設(shè)計(jì)的閥軸,保證軸板密切配合,減少軸板的泄漏點(diǎn),大尺寸(DN400以上)尺寸閥門,軸板間有錐型銷連接。
中心中線蝶閥 的詳細(xì)介紹
FV20 系列蝶閥 Series FV20 ButterlfyValves
蝶閥 Cv 值 Cv value of Butterfly Valve
流量系數(shù) Cv 值定義 Definition of Cv Value
當(dāng)閥門全開時(shí),閥兩端差壓力為1磅/英寸2,流體用600F的清水時(shí),通過閥門的美加侖/分的流量數(shù)。
The valve Cv is the flow rate (in US gal/min) of pure water at 600F passing through the valve when
the valve disc is fully opened and the pressure differential between the two ends of the valve is 1 Lbf/in2
V: *大流量(美加侖/分)
G:比重(水=1)
P1: 流入側(cè)壓力(磅/英寸2)
P2:流入側(cè)壓力(磅/英寸2)
V: Max. Flow (in US gal/min)
G: Specific gravity (1 for water)
P1: Inlet side pressure (Lbf/in2)
P2: Outlet side pressure (Lbf/in2)
Cv= 1.17C 流阻系數(shù)與Cv值的換算關(guān)系
Conversion of flow resistance coefficient and Cv value
d: 閥門內(nèi)徑或閥座口徑in (英寸)
ζ: 流阻系數(shù)(無量綱)
d: Valve bore size or valve seat bore sie (in)
ζ: Flow resistance coefficient (no unit)
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