HOLLOW JET DISCHARGE VALVE

The hollow jet valve, also known as a fixed cone valve, is designed to discharge large volumes of high-pressure water, reducing potential downstream damage by converting the flow into a hollow jet that dissipates energy. Its robust design and adjustable capability make it essential for controlling large volumes of water.

The valve consists of a cylindrical body with radial ribs or fins that channel and evenly distribute the water jet, minimising cavitation, vibrations and turbulence. It incorporates a conical seat designed to shape the jet into a fan-like pattern. Annular openings create the outlet. A shutter cylinder (moving part), actuated by two electrically or hydraulically operated stems, adjusts the direction and shape of the water jet by opening or closing the annular openings. This cylinder creates the “hollow jet” which is crucial for energy dissipation. A deflector or diffuser converts the conical jet into a cylindrical one. A sealing ring ensures the valve can close completely without leaks.

• – Hydroelectric power plants
• – Water treatment plants