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How do you calculate flow rate through a valve?

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How do you calculate flow rate through a valve?

The volume flow rate for liquids can be calculated by multiplying the fluid velocity times the flow area. Thus, Cv is numerically equal to the number of U.S. gallons of water at 60°F that will flow through the valve in one minute when the pressure differential across the valve is one pound per square inch.

How do you calculate nitrogen consumption?

Steps to Calculate Nitrogen Balance

  1. Determine nitrogen lost in urine by a 24 hour urinary urea nitrogen test.
  2. Add 4* to the UUN to account for non-urinary losses of nitrogen.
  3. Determine nitrogen intake by dividing the daily protein intake by 6.25.
  4. N-bal.= value from #3 – value from #4.

How do you calculate valve CV?

Cv by definition is the number of gallons per minute (GPM) a valve will flow with a 1 psi pressure drop across the valve. For example a valve with a Cv of 10 will flow 10 GPM with a 1 psi pressure drop. The formula used to select the valve Cv with the specified differential pressure is: Cv=GPM/((SQ RT(∆P)).

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How do you calculate valve Kv?

Flow Calculation – (Kv)

  1. Kv = m3/h – Flow coefficient.
  2. Q = m3/h – Flow.
  3. Qn = m3n/h – Normal flow (20°C 760mm Hg)
  4. P1 = bar – Inlet pressure – (Gauge pressure + 1)
  5. P2 = bar – Outlet pressure – (Gauge pressure – 1)
  6. DP = bar – Pressure drop – (Differential pressure between inlet and outlet pressure)

How do you calculate the flow rate of a gas pipe?

Flow rate is the volume of fluid per unit time flowing past a point through the area A. Here the shaded cylinder of fluid flows past point P in a uniform pipe in time t. The volume of the cylinder is Ad and the average velocity is ¯¯¯v=d/t v ¯ = d / t so that the flow rate is Q=Ad/t=A¯¯¯v Q = Ad / t = A v ¯ .

How do you calculate valve flow coefficient?

The equation for calculating the valve flow coefficient is Cv = Q √ (SQ/P).