Grey Teleflo Vbv-100 Vacuum Breaker Valve, For Industrial, Pressure : 500-700psi

This manual will provide you with the information to properly install and maintain the vacuum breaker to ensure a long service life. The vacuum breaker is ruggedly constructed with bronze or stainless steel trim to give years of trouble free operation.
The valve should be installed at high points along horizontal pipelines or over tanks. The Vacuum Breaker is designed to open fully and allow air to re-enter the pipeline or system during critical vacuum conditions in the pipe or tank mused by power failure or rapid draining of the piping system. The vacuum breaker will not allow air to escape from the pipeline. An optional air release valve can be piped to the side of the valve to release trapped air during pipeline operation.
For critical applications where vacuum protection is a must or where column separation is predicted, a vacuum breaker The Vacuum Breaker is mounted at critical pipeline high points, penstocks, or tanks and allows for rapid inflow of atmospheric air to reduce vacuum conditions in piping systems. When positive pressure in the system is restored, the Vacuum Breaker provides a positive resilient seal to maintain system pressure.
When equipped with an Air Release Valve, the Air Release Valve is used to slowly exhaust the air that was admitted to the pipeline. The slow release of air prevents the sudden rejoining of separated columns in a pipeline and the associated pressure surges or water hammer.