The Fixed Cone Free Discharge Valve, also known as a Hollow Jet Valve or Howell Bunger Valve, is specifically designed for free-discharge flow control at the terminal end of a dam outlet, culvert, or stilling basin.
This energy-dissipating valve delivers a controlled hollow jet that reduces downstream pressure and erosion risk. Common applications include turbine bypass operations, emergency discharge scenarios, and compensation flow duties in low-pressure environments. Its robust construction and open jet design make it ideal for critical hydraulic discharge infrastructure where safe, continuous flow must be maintained.
Available in a wide range of diameters and pressure ratings, the Fixed Cone Valve is engineered to handle high flow rates with minimal cavitation, making it a trusted solution for long-life performance in water and hydropower systems.
Series 3300
Size:
8" - 158";
DN200 - DN4000
Material:
Ductile iron,
Fabricated Steel &
Stainless Steel
Pressure Rating:
Up to 16 bar
High Velocity Discharge:
Up to 25m/sec
High Discharge Capacity:
k=1.7
