调节阀流量系数与可调比关系的研究

The relationship between flow coefficient and turndown ratio is discussed based on the requirements of practical applications． Thus it is stated that the turndown ratio might be considered as the characteristic parameter of the flow characteristic curve． On this basis the difference between the National Standard and International Standard in regulations of the deviation of flow coefficient is stated． Through relevant calculations, the demerits existing in National Standard and product design are revealed．

The Study on the Relationship Between Flow Coefficient and the Turndown Ratio of the Control Valves

The relatioship between flow coefficient and turndown ra- tio is discussed based on the raquirements of practical applications. Thus it is stated that the turndown ratio might be considered as the characteristic paramenter of the flow characteristic curve. On this basis the difference between the National Standard and International Standard in regulations of the deviation of flow coefficient is stated Through relevant calculations, the demerits existing in National Stan- dard and product design are revealed.