△P = pressure drop across value (psi) S = specific gravity of media 这个方程式适用于湍流和粘性接近于水的液体。 (Cv是指介质温度为60oF的水,通过阀门产生1.0 psi压降 时的每分钟流量。)(这时水的具体重力是1。) This equation is good for turbulent flow and for liquids with viscosities near that...
The Cv value is indicated on the valve’s product description or specifications label and is utilised to determine the correct sized valve based on the required flow rate and pressure drop. Cv值显示在阀门的产品说明或规格标签上 If required, it is advisable to select a valve with a Cv value ...
Cv值定义 Cv值定义Definition of Cv Value C值定义Definition of C Value 当阀门全开时,阀两端压差为1磅/英寸2，流体用60°F的清水时，通过阀体的美加仑/分的流量数。 The value Cv is the flow rate (in Us gal/min) of pure water at 60°F passing through the valve when the valve ...
To calculate the Cv value of a valve for a water flow of 25 GPM (gallons per minute) with a differential pressure of 12 psi, the Cv value is calculated to be approximately 7.22. This means that under these conditions, a valve with aCv of 7.22will allow 25 GPM of water to flow throug...
流量系数Cv值的基本公式BASIC FORMULAS FOR CV VALUE 流体介质Fluids压力条件Pressure ConditionCv值Cv Value 液体Liquid 无n/a $$ C_v = 1.17Q \sqrt{\frac{G_s}{\Delta P}} $$ 气体Gas $$\Delta P < 0.5P_1$$ $$ C_v = \frac{Q}{272} \frac{\sqrt{G_s(T+273)}}{\sqrt{\Delta P(...
Valve Cv applies to the coefficient of pressure drop(ΔP) or head drop (Δh) on the valve of Q(flow capacity). This article will tell you everything about the valve cv.
Note: Upon entering the steam line pressure, the “Find the best drop” button selects a higher (80% inlet pressure) or a critical pressure drop. The controllability of the best results for the "best" pressure valves has declined. You can enter your own pressure drop value.Sign...
(ISO 5752) 压力范围 PN10 PN16/150LB 温度范围 PTFE: -30°C - +120°C 材料 阀体: WCB CF8 CF8M 阀板: WCB+PTFE WCB+PFA CF8+PTFE CF8+PFA 阀杆密封: FPM 轴: 不锈钢 密封: PTFE 手柄: GGG40 选项 电子指示器 加长手柄 手轮装置 Specification DESIGN The valve body has a split structure,...
If you calculated aCv value of 47, you would want to choose the 3-inch valve because in the 2-inch, 47 would fall outside of our recommended range. If you calculated aCv of 35, it falls in the range for both valves. In this case we would recommend the 3-inch because it falls clo...
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