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Voith Turbo surges ahead in innovation

The new DECV servo valve (Direct Electronic Copy Valve) from Voith Turbo represents the latest development of this product, which has already proven itself in countless hydraulic control systems.

The directly-controlled Voith Turbo DECV servo valve.
The directly-controlled Voith Turbo DECV servo valve.

 

“It combines excellent operating characteristics and robustness with innovative valves and associated electronic control,” Derain Pillay, Vice President: Power, Oil and Gas, comments.

Impulse response and accuracy means that the Voith Turbo DECV is responsive to demanding drive tasks. A step response of only seven milliseconds places the DECV firmly in the class of highly dynamic valves. A hysteresis of under one percent is achieved thanks to the direct actuation.

Pillay explains that the development of the Voith Turbo DECV is focused on applications with high mechanical loads.

The DECV’s extraordinary parameters are also confirmed outside laboratory conditions in its daily work environment.

For example, this servo valve has already proven itself in punching/nibbling machines that clock up a g-force in the hundreds (>2 000 m/s2).

New DECV servo valve helps to reduce operating costs

The Voith Turbo DECV is unaffected by oil impurities, and can be used with oil of cleanliness class 19/17/14 as per ISO 4406. This oil-quality level can be achieved by means of a common bypass filter system. Comparable servo valves often require higher purity levels, which means using expensive pressure filters. The Voith Turbo DECV, on the other hand, plays a major role in helping to reduce operating costs.

The programmable control electronics of the Voith Turbo DECV offers all common interfaces, which simplifies integration into existing systems. The HS4-SV2 controller used contains a configurable PLC/CNC, in addition, to the control amplified. Frequently-occurring user cycles are already integrated, and can be customised easily via field buses for specific requirements.

Diagnostic data can be retrieved via Ethernet from anywhere in the world using the PunchMaster software tool accompanying the HS4 controller.

This ensures the identification of faulty cycles and provides quality assurance during production. An integrated sensor measures the pressure directly at the process connection, ensuring extremely accurate and dynamic process monitoring and control. This avoids downtime, which in turn limits the need for costly repairs and service calls.

A system integration and remote maintenance schematic for the Voith Turbo DECV servo valve.
A system integration and remote maintenance schematic for the Voith Turbo DECV servo valve.
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Tristan Wiggill
Special Features Editor at Business Fleet Africa
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