Operational Characterization of Pressure Regulating Valves

Figure 3

Deviation between the regulated pressure and the declared preset pressure (p) when the reference flow velocity varied from 0.5 to 1.5 m s⁻¹ and from 1.0 to 2.0 m s⁻¹. Inlet pressures: (a) 1.5 times declared preset pressure; (b) 0.8 times nominal pressure; and (c) inlet pressure at the middle of the regulation pressure range.