REGULATOR SIZING - Steam Specialty

REGULATORSIZING- 107 -DEFINITIONSRELATING TOREGULATORCAPACITYThe capacities contained in this bulletin are based on a specificlevel of performance by the REGULATOR . The measure of perform-ance is accuracy of regulation, also known as offset or table is appended with a footnote indicating the accuracyof regulation obtainable at the rated capacities terms involved in the determination of accuracy ofregulation and rated capacity are defined as follows:* REGULATED VARIABLEis the controlled condition of thefluid either (1) flowing through a REGULATOR or (2) in a processserved by a REGULATOR . Reduced pressure, back pressure anddifferential pressure are the typical regulated variables to bedealt with in this instance. Other cases, such as vapor pressureproduced by a Steam -heated vapor generator, will be found.* MINIMUM CONTROLLED FLOWis the lowest flow at whicha steady condition of fluid pressure can be maintained.

PLANNING MAIN VALVE INSTALLATION A. PLANNING THE INSTALLATION 1. Locate the valve in a straight run of horizontal pipe. See Fig. 1. 2. Allow headroom above the valve for access through the blind

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