Background
Hydropower stations need to follow strict ecological and environmental protection rules. Dams are equipped with ecological discharge pipelines to release stable water flow, protecting downstream river and aquatic ecosystems.
These pipelines run 24/7 with frequent opening and closing. The water contains sediment and fine impurities, requiring valves with good wear resistance and stable sealing performance.
Wafer type electric butterfly valves are highly suitable for these harsh working conditions. Reliable structure and flexible operation make wafer type electric butterfly valves a better choice for hydropower ecological discharge control.
GRAT wafer type electric butterfly valves are professionally customized for hydropower discharge pipelines. This high-performance wafer type electric butterfly valve meets small-bore pipeline on-off needs and ensures accurate ecological discharge regulation.
Key Challenges
Sediment-laden medium prone to valve body siltation and jamming
The discharged water carries river sand and suspended solids; long-term water scouring allows debris to accumulate inside the valve body, resulting in stiff valve operation, compromised shutoff performance and unstable regulation of ecological discharge volume.
High anti-corrosion requirement under permanent water immersion
Valves are fully immersed in ambient fresh water round the clock. Continuous medium corrosion and abrasive wear from sediment on sealing components easily cause leakage, failing to meet precise flow measurement standards for controlled ecological discharge.
Restricted installation space for on-site retrofitting
Pre-set flange spacing of embedded dam discharge pipelines is narrow with densely arranged pipework. Limited available mounting space mandates compact product dimensions and easy disassembly without extensive modification to existing piping layout.
Complex power supply & high requirements for automatic control integration
The power system at power plants incorporates dual supply specifications: DC24V automatic control loop and AC220V industrial mains. Valves need dual-power compatibility and seamless connection with DCS remote control systems for remote open/close regulation.
Operating Conditions
Product Name: GRAT Wafer Type Electric Butterfly Valves
Application: On-off shutoff control for ambient-temperature clean water on environmental ecological discharge pipelines of hydropower dams
Carried Medium: Fresh water with trace river sand and aquatic suspended solids
Nominal Pressure: PN16
Nominal Diameter: DN100, DN150
Material: SUS304 Stainless Steel
End Connection: Wafer type
Operation Type: On-off shutoff service
Operating Power Supply: Dual-power compatible for DC24V & AC220V
Design Service Life: 5 Years
Performance Result
Lightweight wafer design cuts retrofitting costs
The compact wafer configuration enables direct clamping installation without modifying original pipeline flanges, drastically shortening construction lead time. Compared with conventional flanged valves, installation material and labor costs are reduced by 40%, perfectly fitting confined mounting space of dam pipe networks. Suitable for both large engineering retrofits and small on-site replacement.
SUS304 stainless steel construction resists sediment corrosion and clogging
Full SUS304 stainless steel valve body delivers outstanding resistance against fresh water corrosion and abrasive sediment erosion. Streamlined butterfly disc eliminates dead zones for dirt accumulation and sediment lodging, cutting annual valve cleaning frequency by 75% and eliminating valve jamming induced by silt buildup.
Premium sealing performance eliminates leakage for accurate discharge control
Optimized concentric sealing structure ensures tight shutoff with no persistent water seepage, achieving complete pipeline cutoff on demand. Ecological discharge volume can be accurately managed to satisfy regulatory environmental discharge standards and prevent excessive water release.
Dual-power design compatible with plant automatic control systems
Universal DC24V/AC220V dual-power design seamlessly integrates with existing remote automatic control systems of hydropower stations. Valves execute reliable open/close actions upon remote commands to realize intelligent management of ecological flow discharge.
Call to Action
Optimize your hydropower ecological discharge systems with GRAT high-performance wafer type electric butterfly valves to tackle siltation, leakage, installation and control compatibility issues. Ideal for large-scale hydropower renovations, pipeline upgrades and individual replacement needs, our durable, cost-effective and smartly compatible valves ensure precise, stable and compliant ecological water discharge while lowering operational and maintenance costs. Get in touch today for professional technical support, tailored quotes and one-stop valve matching solutions!