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Title: High Pressure Gas Regulation-A Guide To Avoid Some Troubles And A Guide To Safety Measures
Author: W. S. Hull
Source: 1966 Appalachian Gas Measurement Short Course
Year Published: 1966
Abstract: As pulsation or chattering is one of the most apparent troubles of regulation, you will find it occurs mostly: A. In two or three stage reduction where the load varies widely and oversize valves are a necessary evil. Suggested remedy: 1. If inlet is over 150 psig, use a CBVA 700 or 800 Motor Valve and 61 Controller in first stage. 2. Snub breather of second stage. 3. Keep pipe size up and velocities under 100 miles per hour (50 miles per hour is best). 4. Use straightening vanes ahead of static line if velocities are above 100 miles per hour.

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