Butterfly valve is widely used as an inlet valve in hydropower station & water pump station.
Butterfly valve are equiped on the hydro turbine inlet pipe, be used for through or cut off flow quickly. Counterweight butterfly valve is one type of butterfly valve which drived by hydraulic counterweight, it can be closed without electricity, effectively dispel the destructive water hammer, prevent water pump and hydraulic turbine from over speed, reduce the pressure fluctuation of the pipe network system, guarantee equipment’s safe and reliable operation.
Butterfly valves are generally favored because they are lower in cost to other valve designs, as well as being lighter in weight, meaning less support is required. The disc is positioned in the center of the pipe, passing through the disc is a rod connected to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow. Unlike a ball valve, the disc is always present within the flow, therefore a pressure drop is always induced in the flow, regardless of valve position.
This type of valve is controlled by PLC, it can control locally as an independent systematic unit, and also can be controlled remote by the central computer as an apparatus unit of the distributing control system (DCS), realize linking and operating with water pump, hydraulic turbine, by-pass valve and other pipelines apparatus. It is furnished with manual function, and can turn on, turn off the valve manually without power, meet valve debugging, control request under the special operating mode.
There are different kinds of butterfly valves, each adapted for different pressures and different usage.
sometimes more economical to use the valve with motor/manual operation, are cheaper than hydraulic type.
we can supply the butterfly valve :
- Nominal Diameter: 100- 5000 mm,
- Nominal Pressure: 0.25 – 2.5 Mpa