Combined Check Valves or Hydraulic actuators weight loaded HAWL valves are used at all critical areas where the pipelines must be reliable, immediate and controlled quickly for valve closing, e.g. in case of external power losing, cutting off electricity cables during The earthquake, disasters In a system, ruptured pipelines, etc.) While for the valve closing is used a potential energy of lifted weight. The counterweight and lift cylinder shut-off valve is used to stop the water on the pipelines automatically. The pipeline shut-off function must be guarantee under hardest of maximum flow rate or pressure and in case of electric power failure. The movement of the shut-off device ( ball valve, needle valve) is guarantee by means an hydraulic actuator composed by hydraulic cylinder to maintain the valve open and a counterweight to close the valve.