HYDRAULIC WORKS

Butterfly Valves

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The Butterfly Valves are frequently used in power plants and dams. They have various applications the most common of which are:
• Penstock Protection: the valve acts as both a safety and maintenance device for the penstock. As a rule valves used in this type of application are characterised by large diameters.
• Turbine Protection: the valve acts as both a safety and maintenance device for the turbine. Usually the valves used in this type of application are characterised by high water pressures.
• Water Discharge Line: the valve acts as both a safety and maintenance device for the upstream discharge.
• Water Intake: the valve is employed to open/close the intake lines of the intake tower

Vortex Hydra design and manufacture both mono-plane and bi-plane (lattice type) Butterfly Valves depending on the dimensional requirements and operating water pressures. As a special application a secondary maintenance seal system that is mechanically actuated (rubber seated in metal) can be implemented.
The Butterfly Valves are manufactured with the combination of steel plates and forged components. Vortex Hydra as part of their design criteria normally recommend the grade of steel to be used but any special request from the customer can be analysed and agreed on.

The operational system of the gates can consist of the following:
• Cylinder with counter weight (the cylinder can be actuated by either hydraulics or high pressure water).
• Electric motorised gearbox
• Special operational system defined and agreed with the customer

A typical range of applications are:
• Diameter up to DN5000
• Pressure up to PN40

Sealing System: rubber seated in metal.
Geometrical Feature: double eccentric
All phases of the engineering design and fabrication through to final testing are undertaken by Vortex Hydra in compliance with UNI EN ISO 9001 Quality Management System.
Vortex Hydra design and manufacture Butterfly Valves having a nominal diameter up to 4700 mm diameter.

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