New Butterfly Valve with Double-function

22.05.2014

In July 2014, the KSB Group will launch a new shut-off butterfly valve, which also functions as a check valve. It is manufactured in nominal sizes ranging from DN 500 to DN 1400 for pressure classes PN 6 to PN 40.

New Butterfly Valve with Double-function

The new compact Dualis series combines the functions of a shut-off butterfly valve and a check valve. (Image: ©KSB Aktiengesellschaft, Frankenthal)

During normal operation, valves of the Dualis series work as electro-hydraulically actuated butterfly valves. They open and close like ordinary butterfly valves with a category A tightness to ISO 5208 / EN 12266-1.

In the event of a failure, a weight fitted to the lever arm closes the valve at an adjustable pre-set speed. This protects pumps, water turbines and pipelines from the destructive forces of surge pressure and prevents undesired backflow of the fluid handled.

The new soft-seated valve has been designed for applications in water transport, water distribution, seawater desalination and hydropower as well as in industrial cooling circuits.

The actuator is a compact unit which comprises all electro-hydraulic components. This allows easy access to all key components and facilitates dismantling and reassembly of the actuator. The valve needs to be connected to a three-phase 400 V/50 Hz power supply as standard. The opening and closing times can be set to the precise system requirements.

Dualis has been designed in modules to easily accommodate any customer-specific options, such as special control cabinets, various electrical measuring equipment, sensors or control units.

More articles on this topic

Patented Sealing Solution to Improve Drinking Water

14.08.2023 -

In appliances used for water purification and carbonated water, the valve of a carbon dioxide cartridge and the pressure-reducing valve on the device itself must be joined with a secure seal. Now, Freudenberg Sealing Technologies has developed a patented, high-performance polyurethane seal for a customer that has a specific geometry that not only accommodates different valve dimensions on the various gas cartridges, but also offers high impermeability under long-lasting pressure.

Read more

ITT Engineered Valves Announces New Cam-Tite Ball Valve GV Series

16.05.2023 -

ITT Inc.’s Engineered Valves announced the launch of the Cam-Tite Ball Valve GV Series, an innovative valve solution designed as a direct dimensional and upgraded replacement for severe service applications. The GV Series utilizes advanced sealing technology to isolate and contain highly hazardous liquids and gases to protect the safety of operators and prevent fugitive emissions.

Read more