WebThe C-value (l/ (s*bar)). Flow sonic conductance. Ratio of volume flow Q and input pressure p1 abs for choked flow C=Q/p1 abs. b. Critical pressure ratio. Ratio of output pressure p2 abs and input pressure p1 abs which marks the transition from choked flow (sonic velocity in narrowest section) to subsonic flow. kv. WebFlow Factor - Kv. The metric equivalent of the flow coefficient - Cv - is based on the SI-system and is called the. Flow Factor - Kv. The flow factor - Kv - is defined as. the flow …
What is CV of Control Valves? THINKTANK
WebFeb 10, 2024 · The flow coefficient is determined by way of experimentation according to the standard VDE 2173 and it represents the quantity of water discharged from the solenoid valve with a pressure difference of 1bar at … WebFor a specific control valve, flow coefficient Cv/Kv is determined experimentally by control valve manufacturers, and you can found it in manufacturers technical specifications. They express coefficient Cv/Kv as the flow rate of water in g.p.m. [m3/h] for a pressure drop of 1 psi [1 bar] across a flow passage [flow coefficient: Cv-imperial, Kv ... mackenzie accountants
Flow coefficient - Wikipedia
WebCalculation of the K V value for gases. When calculating the K V value for gaseous media, a distinction is made between a subcritical and a supercritical flow condition.. Subcritical is … WebSep 10, 2013 · Kv is defined as flow in cubic meters per hour of water (temp 5 to 40 deg C)passing through the valve when pressure drop is 1 bar across the valve. Cv is defined as flow in US gpm of water (temp 60 deg F)passing through the valve when pressure drop is 1 psi across the valve. They are related as Cv = 1.156*Kv. WebK v is the flow coefficient in metric units, and can be calculated with the following equation: where KV: Flow factor (m3·h-1·bar-0.5) Q: Flow rate (m3/h) SG: Specific Gravity of the liquid (dimensionless). For water … costo cucine