Hydraulic operated check butterfly valves fulfil the functions of hydraulically operated butterfly valves and hydraulic brake check valves. These valves are designed for pulse-free and noise-free operation of the pumps. The valve is driven by a hydraulic power unit. When the pump starts to operate, the valve starts to open with the activation of the hydraulic unit. It saves energy by supporting the pump to start without load. When the pump starts to stop, it starts to close and when it is fully closed, the pump stops. Switching on and off is done automatically. If the pump stops for any reason at the pumping station, the valve closes like a hydraulically braked check valve with the help of a counterweight. Switch on and switch off time can be adjusted independently according to the operating conditions. In case of emergencies, there is a manually operated lever pump in the hydraulic power unit to control the valve.