The CV value of a valve refers to the flow coefficient of the valve, which is used to indicate the flow capacity of the valve under specific working conditions. The CV value refers to the volume flow of liquid or gas that the valve can pass under a given pressure difference. The larger the CV value, the greater the flow capacity of the valve.
The CV value of a valve is affected by many factors. The valves structure, valve size, valve material, flow state and fluid state (such as temperature, pressure, viscosity, etc.) of the valve will affect the flow coefficient. The most important of these are the structure and fluid characteristics of the valve. Correctly calculating and selecting the CV value is an important step to ensure the normal operation of the pipeline flow control system.
NSW Valve Factory provides you with free valve CV calculation services.
The calculation formula for the CV value is:
CV = Q / (ΔP√ρ)
Where CV represents the flow coefficient, Q represents the volume flow through the valve, ΔP represents the pressure difference, and ρ represents the density of the fluid.
CV values are often used to select and design valves to help determine the required valve size and type to meet specific flow requirements.
Chinese valve factories generally use KV to represent the flow coefficient, CV=1.167KV.
Post time: Jan-06-2025