Abstract
IS06358 was published in 1989 as a standard which specifies the determination of flow-rate characteristics for pneumatic components. Then, in Japan, JIS B 8390 corresponded to IS06358 was published in 2000. These standards represent the fl ow-rate characteristics over the full range using “Sonic conductance C” and “Critical pressure ratio b.” In this paper, comparison with IS06358 and Existing representation method. Moreover, the problemof the measuring method by ISO was clarified and the flow-rate characteristic model for the representation method was proposed. Furthermore, the method by “Effective conductance” which grasps the flow-rate characteristic of pneumatic components with a single parameter was suggested, and the development of the test method replaced with the ISO method was suggested.
