AWWA ACE95174

The following is intended to be an overview of air related problems in distribution systems and how Air Valves are used to solve these problems. The presence of air in a pipeline and it's impact on operations is probably one of the most misunderstood phenomena in our industry today. When air is allowed to accumulate in pressurized pipelines, efficiency is sacrificed and serious damage can occur. Many operation problems, especially at the time of initial startup, are blamed on inadequate thrust blocking, improper pipeline bedding, etc. These problems include broken pumps, valves and pipe, as well as faulty instrumentation readings. In reality, many of these problems are not caused by improper installation of the line, but by failure to de-aerate the line. A properly de-aerated pipeline will not solve all surge problems. However, the elimination of air can solve one of their most common causes. Air Valves are a cost effective, reliable method of improving efficiency and solving air related surge problems.