What does CV mean for a valve?
Valve Flow Coefficient
What is a CV value?
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).
What is KV in control valve?
Kv-value The Kv-value is a parameter defining the flow rate of valves. It describes the amount of water from 5° to 30°C which flows through the valve at a pressure loss of 1 bar. The Kvs-value describes the Kv-value when the valve is 100% open.
What is the difference between KV and KVS?
The Kv value expresses the amount of flow in a regulating valve at a given valve position with a pressure loss of 1 bar. The Kvs value expresses the amount of flow in a regulating valve at a fully-open valve position and a pressure differential of 1 bar. …
How do you calculate valve Kv?
Flow Calculation – (Kv)Kv = m3/h – Flow coefficient.Q = m3/h – Flow.Qn = m3n/h – Normal flow (20°C 760mm Hg)P1 = bar – Inlet pressure – (Gauge pressure + 1)P2 = bar – Outlet pressure – (Gauge pressure – 1)DP = bar – Pressure drop – (Differential pressure between inlet and outlet pressure)
What is nominal valve size?
The nominal diameter is referred to as the pipe diameter or the mating dimension of a valve (with valves this is usually referred to as the nominal size).