I have a question regarding the KV value of control valves; I’d like to ask the experts for their advice
Thread Content
A control valve with Kv=50 means that when the pressure difference across the valve is 100 KPa, the water flow rate is 50 m3/h. If the pressure difference across the two ends is 200 kPa, then is the water flow rate 100 m3/h?
One would need to consider the linear range of the relationship between the valve’s flow rate and pressure difference before drawing a conclusion
When the piping system remains constant, the flow rate depends on the pressure difference, and there is a quadratic relationship
Kv or Cv is used to define the flow capacity of a valve under certain conditions; it is generally calculated based on factors such as the pressure difference before and after the valve as well as the fluid flow rate. Once the values of Kv or Cv are determined, an appropriate rated value is selected to meet requirements related to the degree of opening and noise levels； Obviously, first you need to obtain the derivation formula and then see if it’s possible to work backwards as you mentioned.