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Title: High Pressure Regulators
Author: Forest H. Wehrman
Source: 1966 Appalachian Gas Measurement Short Course
Year Published: 1966
Abstract: When upstream pressure is introduced into the jacket (space between body and top of tube), balancing the pressure across the tube, the tension of the tube on the core forms a positive, bubble-light seal. Since the tube conforms to uneven surfaces, its ability to shutoff tightly is practically independent of erosive core wear, As jacket pressure is reduced, upstream pressure within the tube tends to progressively lift the tube until it is completely off the inlet slots and partially uncovers the outlet slots, establishing a smooth and even throttling condilion. The jacket pressure condition necessary for throttling can be produced by manual or automatic pilot control. The Flexflo reacts instantly to the slightest pressure variation, compensating automatically for surge of shock impulses. Stability of all throttling positions is accurately maintained.

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