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Title: Industrial Regulators
Author: Louis J. Delaney
Source: 1968 Southwestern Gas Measurement Short Course (Now called ISHM)
Year Published: 1968
Abstract: Every regulator manufacturer and designer strives to develop a regulator capable of maintaining a constant outlet pressure with varying inlet pressures. Almost every gas distribution system today is confronted with widely fluctuating pressure conditions. Holding constant meter pressure is becoming more important to utilties in their measurement programs. By using a constant pressure factor and measuring at higher pressures, they can install smaller meters. However, the metering pressure has to be extremely constant or the pressure factor will not afford accurate measurement. As an example, if the pressure factor being used on a meter is 10 p.s.i. and the meter inlet pressure increases or decreases 0.5 p.s.i., a 2% error in measurement would be experienced (Figure 1).

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