What is control valve cv

It describes the relationship between the pressure drop across an orifice, valve or other assembly and the corresponding flow rate. Mathematically the flow coefficient Cv (or flow capacity rating of valve ) can be expressed as: C v = Q S . Sometimes “pressure drop” is described as pressure differential or “delta P”. Click here for more information about valve sizing and Cv formulas.

Need help determining the correct Cv value for your valve and fluid?

There are multiple calculators available on the internet.

Flow coefficient and proper design of control valves - Imperial Units.

This standard and the corresponding measuring standards contain. NOTE: The formulas provided here are simplified for general use. Cv equals 3and rangeability equals 10. These effects were not considered in the example. This approach is sound as long as two things are verified: the close-off pressure of the valve assembly and the head loss added to the system (pressure drop across the valve ). This fourth edition presents vital information on control valve performance and the latest technologies.

In deciding the size of the control valve that (Port Size) we need to calculate the Cv value of the process (Calculated Cv ) by calculating Cv has educated more than years, which is involved in. Renault number (Reynolds number), flow rate (Flow), the Shock (Choking), the involved joints in . The valve flow coefficient, Cv , is the number of U. Noise and the appropriate Actuator Size. CV : The Flow Coefficient, CV , is a. Control valve flow coefficients. SIZING AND SELECTION OF CONTROL VALVES.

When control valve professionals talk about control valve sizing, they really mean the entire process of selecting the valve that will do the best job of controlling the process. Selecting the right size valve is an important part of the process, but there are other equally important considerations as well. The CV factor found is the CV needed to get full rated flow when the . Therefore equal increment of travel . The flow rate through any valve is factor of both valve Cv (resistance) and the differential pressure that exists across the valve. Traditional control valves move up and down to adapt their Cv to control flow, and can be disrupted when the upstream or downstream pressure shifts.

Compatible with highly corrosive processes and designed for use in CMP slurry applications.