The pressure regulator is a central assembly element of gas reduction station. During the system operation the cases of pressure regulator unstable work can happens. One of their main reasons is the failure to fulfill a condition under which the gas-network gas consumption should fit in a specific range of its throughput with given gas flow parameters. According to technical and regulatory documentation analysis the acceptable range boundaries of stable regulators operation have different numerical values. Obviously, insufficient study of the system parameters influence on the transient processes range and course during the reduction has occured. Relevance of the present article is due to the necessity of studying and clarifying the stable operation range boundaries for different regulators at diverse gas flow parameters. At the stage of theoretical studies, the techniques for pressure regulators throughput determination were considered, mathematical relationships alowing to obtain the result with an acceptable value of relative calculation error in comparison with the technical passport characteristics were determined. The effect of temperature, gas density, input pressure magnitude on regulators throughput and range boundaries variation of stable operation was investigated. For carrying out experimental studies an operating gas control equipment was developed. According to obtained data the relations were derived and graphs were plotted. Comparative analysis of the results of theoretical and experimental studies has a relative error less than 10 %, that approves the correctness of obtained data. Thus, the research results clarify the range boundaries of pressure regulator stable operation recommended in the regulatory and technical documentation.
Keywords: PRESSURE REGULATOR, THROUGHPUT, GAS FLOW PARAMETERS, RANGE BOUNDARIES OF STABLE OPERATION.