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The History Of Testing The Flow Characteristics Of Pneumatic Components
Flow characteristics are important technical indicators of pneumatic components. Accurate testing of the flow characteristics of pneumatic components is of great significance for evaluating the performance parameters of pneumatic products and the selection of pneumatic control systems. The research on the method of measuring the flow characteristics of pneumatic components has always attracted much attention. In 1989, ISO6358-1989 was officially released, using the two parameters of sonic conductance C and critical pressure ratio b to express the flow characteristics of pneumatic components. After the release of the standard, many researchers have conducted research on the standard and found that the standard has many flaws, such as unreliable measured b-values, or even negative values, high cost of test equipment and instruments, large gas consumption, and poor resistance to flow control valves. Incorrect liquidity regulations, etc. In 1993, in response to the above-mentioned shortcomings, China formulated GB/T 14513. Since its implementation in 1994, this standard has attracted the attention of many colleagues in the pneumatic industry. The series connection sound velocity exhaust method used in this standard is only suitable for measuring pneumatic components whose internal flow channels with connection ports at the back end remain unchanged. In 2013, the new international standard ISO 6358-2013 was officially released, replacing ISO 6358-1989. The new standard ISO 6358-2013 is composed of three parts. The general inspection rules and test methods for steady-state flow of ISO 6358-1 are a very basic and important part of the new standard ISO 6358.