Your KV value of pneumatic control valve, CV value) To understand how much?

Your KV value of pneumatic control valve, CV value) To understand how much? It is what mean? CV name originated in the western industrial process control field in the definition of the valve flow coefficient. In China is often referred to as: the KV value, KV represents the flow capacity of the valve, its definition is: when the pneumatic control valve fully open, differential pressure at the ends of the valve before and after Δ P is 100 kpa, fluid severe r is 1 gf/cm3 ( The normal temperature water) , through the pneumatic control valve flow per hour, in m3 / h or t/h. For example a Kv = 50 pneumatic control valve, said when the valve pressure difference on both ends is 100 kpa, the amount of water for 50 m3 / h per hour.