How fixed cone valves works at Dams and Reservoirs?
Fixed cone valves are used to pass a controlled amount of water downstream without harming the immediate surroundings due to its qualities that dissipate energy. The valve body is designed to operate with minimum vibration over its full stroke and used specially shaped aerodynamically designed ribs leading to a downstream cone.
Fixed cone valves is installed at the outlet of the dams or reservoirs and discharging directly into the atmosphere, they operate safely minimizing erosion or other damage to the surroundings.
The valve bodies are manufactured in either ductile iron or fabricated stainless-steel depend on installation and application. The sleeve is made from stainless steel and uses upstream and downstream seals to ensure drop-tight shut-off. Operation of the valve sleeve is via twin screwed spindles, worm gearboxes, intermediate rods and a double bevel input gearbox. Actuating gear may be manually, electrically or hydraulically operated.
Features:
- End of line installation, for high volume dam or reservoir discharge
- Hydraulic balance, no differential loads, low operating effort, small actuator
- Resilient seal for drop-tight shut-off
- Effective dissipation of the following water kinetic energy before its strikes any boundary surface, minimum wear/ erosion, no cavitation risk
- Acid proof stainless steel sleeve with epoxy coated ductile iron components for high corrosion resistance.
Below is the successful manufacture of FDV from Glenfield, a member of the AVK Group, wherein they installed the largest free discharge valve in history with DN2200 in size. These valves are installed in Pedu Dam, located in Malaysia.
