ARV valve stands for Automatic Recirculation Valve.
An automatic recirculation valve is a multifunctional valve whose primary purpose is to ensure that a pre-determined minimum flow is assured through a centrifugal pump at all times. This is important as centrifugal pumps suffer from over heating and cavitation and can be permanently damaged if they run dry.
ARC valve is the abbreviation for Automatic Recirculation Control valve, and ARC® is a registered name of Yarway. The function of this valve is the same as that of a AR valve.
The heart of the recirculation valve is a main flow sensing check valve disc, which is flow sensitive, not pressure sensitive. The disc modulates to the demand for process flow at the same time helping ensure a minimum flow through the pump. This modulating characteristic results in a consistent, stable, and repeatable performance over full pressure range.