LFF115-7 - Pressure Reducing Control Valve with Downstream Surge ControlPressure Reducing Control Valve with Downstream Surge Control Series LFF115 7, LFF1115 7 Pressure Reducing and Downstream Surge Control Valve is designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of varying flow rate, and quickly modulate toward a closed position when a sudden high pressure downstream condition occurs. The quick closing action of the valve prevents possible