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Title: Pilot Operated Regulators
Author: J. D. Merchant
Source: 1950 Southwestern Gas Measurement Short Course (Now called ISHM)
Year Published: 1950
Abstract: ers, suppliers and operators of natural gas and ems today face more complicated problems than in rfore. The automatic control of pressure, temperaie- of-flow and liquid levels is of the utmost im- ! in the industrial plant system. Vast improvements ED made in the past on the original instruments, riratus and today the control of pressures cannot rely upon the simple weight or spring loaded regulator alone. The weight or spring loaded regulator was considered sufficiently accurate if the controlled pressure was held to within 5 or 10 per cent of the desired pressure, because that met with former general regulation demands. The low pressure regulator has always been more accurate than the high

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