Control valves used for bottom outlets in dams and in hydro-power plants
Aug 08, 2008
Normally Butterfly Valves are used as on-off valves and are usually installed in a valve chamber on the water side of bottom outlet lines in dams or in gravity lines leading to water treatment plants or hydro-power plants. In the best case the Butterfly Valves are assembled with brake and lift cylinders, working as pipe brake devices for emergency quick closing by lever and weight in case of pipe bursts. In dam applications, Control Valves such as Plunger Valves (or Needle Valves) or Fixed Cone valves are installed after the Butterfly Valves on the air side. These valves always work as flow regulating or Control Valves. Plunger valves or Fixed Cone Valves are designed to perform regulating or control functions in water supply systems. Unlike Butterfly Valves or Gate Valves assuming only shut-off functions in pipeline systems, Plunger Valves and Fixed Cone Valves can meet the requirements of regulating operations.
- The cross-section of the flow is annular in each position of the valve
- The axially movable closing device is shaped like a piston or a plunger
- control the flow capacity
- control the water level
- control the pressure in case of a following pipeline.
VAG Plunger Valves in dimensions ranging from 12” up to 64” and with a pressure rating of 150 psi
VAG Fixed Cone Valves in dimension 32” with a pressure rating of 150 psi
VAG EKN® soft seated Butterfly Valves in dimension 80” with a pressure rating of 150 psi
VAG EKO® soft seated Gate Valves ranging from 2” up to 8”, with a pressure rating of 150 psi VAG DUOJET® Air Release Valves ranging from 2” up to 8”, with a pressure rating of 150 psi
Including the necessary pipeline flanges, dismantling pieces, connecting screws and flange seals
Actuators: All VAG Control Valves are equipped with electric actuators and control panels made by German supplier AUMA Riester.
Project duration: 2003 to 2004
Executed by: VAG-Armaturen GmbH, Mannheim, Germany (hereinafter called VAG)
Contracted by: Algerian Water Enterprises (AWE)
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Peter Oppinger, Head of Marketing at VAG-Armaturen GmbH
68305 Mannheim, Germany
+49 621/ 749-2106
+49 621/ 749-292106