How do you calculate gpm on a 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)).
How do you calculate SCFM on Cv?
- SCFH = (Pactual /14.696) × (519.7˚R/Tactual ) × CFHactual.
- Problem: Find the rate of flow of water through a 1½” unlined cast iron flanged valve, half open, with a pressure drop of one psi.
- Problem: Find the rate of flow of water through a 1½” unlined flanged valve, half open, with a pressure drop of 1 psi.
What is Cv calculation?
The formula for the coefficient of variation is: Coefficient of Variation = (Standard Deviation / Mean) * 100. In symbols: CV = (SD/x̄) * 100. Multiplying the coefficient by 100 is an optional step to get a percentage, as opposed to a decimal.
What is Cv in gas flow?
The coefficient of flow (Cv) is a formula which is used to determine a valve’s flow under various conditions and to select the correct valve for a flow application. The formula becomes more intricate for gases, as gases are compressible fluids and are thus affected by temperature.
What is the formula for fluid therapy for dogs?
Dog: Formula = 132 body weight (kg)0.75 per 24 hr Rule of thumb 2–6 mL/kg/hr Fluids for the sick patient Assess for three types of fluid disturbances. 1. Changes in volume (e.g., dehydration, blood loss, heart disease) a. Fluid deficit calculation for dehydration: body weight (kg) x % dehydration = volume in liters to correct.
How to calculate flow rate from CV value?
Calculating the flow rate from the Cv value requires complex calculations. We have created a Cv value and flow rate calculator, so please utilize it. If you want to calculate the Cv value and flow rate outside of the specified units, please contact us.
What is the CV value of a valve?
What is Cv value? The valve flow coefficient according to the JIS standard, represents the flow capacity in US gallons/minute of 60° F pure water when it is flowing through the valve with a pressure difference of 1 psi at the specified travel (operation range). Calculating the flow rate from the Cv value requires complex calculations.
How to calculate flow capacity in imperial units?
flow capacity in imperial units – GPM (US gallons per minute) that a valve will pass for a pressure drop of 1 lb/in2 (psi) The flow factor – Kv – is also commonly used with capacity in SI-units. The flow coefficient – Cv – required for a specific application can be estimated by using specific formulas for the different fluids or gases.