Danfoss DVG Directional Control Valves Enhance Equipment Performance
Danfoss’ DVG open-center directional control hydraulic valves help achieve faster cycle times in a range of mobile equipment applications.
Key features of the DVG control valves include:
- higher meter-out flow
- improved pressure drop for lower fuel use
- modular design to fit various design configurations
- ability to combine up to 12 work sections in one valve.
Improved Hydraulic Valve Design Benefits Productivity and Efficiency
The DVG family of hydraulic valves includes the DVG 60 and DVG 100 models which are designed to provide a meter-out flow 75% higher than meter-in flow at 15 bar pressure drop.
A higher meter-out flow enables faster cylinder reaction which leads to faster response times for machine work functions as well, enabling improved cycle times and thus productivity. In addition, Danfoss said this capability reduces use of complex or oversized systems that could otherwise add weight to machines.
With its DVG valves, Danfoss was able to improve pressure drop to help reduce power losses and heat generation, lowering fuel consumption and cooling requirements. According to the company, pressure drop from the valve inlet to the work port is 33% lower in a DVG 60 valve and 7% lower in a DVG 100 valve.
Another performance benefit offered by the DVG directional control valves is the controllability they can provide over other open-center valves in the market. This is enabled by 4.2 mm of active spool stroke resolution on the valves' proportional electrohydraulic controls. Improved control helps to enhance the overall machine operating experience as well as productivity by enabling work to be done more precisely, reducing the potential for rework.
Control Valves to Suit Range of Applications
The DVG 60 and DVG 100 valves can be used in various construction, material handling, and agricultural machines, such as skid steer loaders, compact track loaders, backhoe loaders, truck-mounted cranes, and tractors.
Both valves feature a modular design and common interface, easing configuration by OEMs and system integrators for specific machine application requirements. A total of 12 work sections can be combined into a single valve, further aiding design flexibility for customers.
The valves are available with proportional actuators programmable using Danfoss' PLUS+1 software. Within this software users will find preprogrammed compliance blocks for the actuators, making it easier to implement electronic control for the valves and reduce development time.
Various actuation methods, spools, and features are available for the DVG hydraulic valves to further enable customization for specific application needs:
- Circuit options include series, parallel, and tandem.
- Control types include electronic (proportional and on/off), mechanical, cable, hydraulic, electropneumatic, and pneumatic.
- Spool range includes three-way, four-way, float, regen, and kick out.
The DVG 60 valve offers a work port flow rate of 60 lpm (15.8 gpm) and the DVG 100 a flow rate of 100 lpm (26.4 gpm). Both valves have a work port continuous pressure rating of 310 bar (4,500 psi).
