Influence of the Internal Throttle Block on Dynamics of a Gas Pressure Regulator with a Built-In Silencer

The paper presents results of a study of dynamic characteristics of a gas pressure regulator used in gas transportation and distribution systems. Operation of such units at a high pressure drop is accompanied by a high level of noise, for reduction of which, silencers are often installed into the regulator design. To prevent a decrease of accuracy, loss of stability and occurrence of self-oscillations, the block of two throttles are added in the structure. As a result of theoretical and experimental studies, it is shown that the proper choice of throttle resistances can ensure the stability of the control system in a wide range of gas flow rates.