Installed before hydro turbine as main valve in large and medium hydro power plants, dams, pumped-storage hydro power plant, high head high speed HPP to protect hydro turbine.
When hydro turbine or generator needs maintenance, it can be used for shutting off the water.
When hydro turbine or generator is abnormal, it can be closed quickly to shut off the water to prevent accidents.
1. Main valve: ball valve/sphere valve
2. Bypass system: bypass pipe line, dismantling joint, handwheel bypass valve, electric bypass valve
3. Air valve, drain valve
4. Dismantling joint
5. Short pipes connected at both end of ball valve
6. Hydro power pack
7. Electric control cabinet
8. Hydraulic actuator