Valve technology for your pilot control
Rely on HYDAC for the configuration of your pilot control system
Rely on innovative valve technology from HYDAC. Our components and systems impress with their dynamic conversion of electronic signals into hydraulic functions. The precise control therefore enables an accurate machine response – even with the most subtle changes in signal.
Dynamic, robust and space-saving valve solutions for your pilot control system
Installation space optimisation Pilot control systems require space-saving hydraulic solutions
Weight limitations and restricted space can have a major impact on how pilot control systems are integrated. In compact mini excavators in particular, there is an acute lack of space. This means that the most space-saving hydraulic solutions are preferred – making valve solutions with a compact design all the more in demand.
Efficiency & dynamics Application-oriented valve solutions
For high machine availability, valves that are robust and long-lasting – even in variable environmental conditions – are a must. Reducing leakage losses to preserve the accumulator supply in emergency operation and efficient system dimensioning also play a major role. Another important factor is that dynamic valves are required to achieve rapid changes in direction.
Automation Innovative proportional technology as the basis for automation solutions
Acceptance of automatic machinery can only be achieved if the user can change to a manual operating mode and feel that the level of control is no worse than in a conventional solution. The trend towards partial automation and the introduction of assistance systems are forcing the conversion of working hydraulics to electro-hydraulic control systems. The proportional valves used need to meet strict requirements.
Reduction in costs Complex pilot control blocks lead to increased costs
If the pilot control system is supplied directly from the working hydraulics, a pressure-reducing valve is needed. The full operating pressure of up to 420 bar is applied to this valve's primary connection. This means that the pilot control block has to be made from steel. In complex blocks in particular, this results in increased costs compared to components made from aluminium. To lower costs, innovative designs can enable the use of lighter, less expensive blocks.
Optimised valve solutions for your requirementsHYDAC has the solution to tackle your challenge
The above challenges have inspired us to continuously develop our valve solutions – especially when it comes to proportional technology. With this product range, HYDAC doesn't just make it possible to use individual components. Different components such as hydraulic accumulators, integrated filters and sensors can also be combined to form integrated pilot control systems.
Our solution: HYDAC proportional valves and switch valves
Benefit from the special features of our solenoid valves
The HYDAC range of proportional pressure-reducing valves and directional valves for pilot control systems provides components that can achieve a high power density in the smallest of spaces. The switch valves & proportional valves are based on high-quality solenoids configured to suit the rough environmental conditions that your mobile machines operate in. Numerous environmental tests of the solenoid systems used here have confirmed the robustness of the components in this application. They reduce the amount of testing needed, simplifying approval for the use of the valves in your machine. With their low inductance, the compact solenoids enable both responsive and powerful switching characteristics.
Proportional pressure control valves for electro-hydraulic pilot control
HYDAC proportional pressure control valves for pilot control systems feature low leakage thanks to the consistent application of direct-acting design principles. This characteristic is particularly advantageous in the event of emergency operation with an accumulator supplying the pilot control systems. The broad range of possible electric dither parameters for control of the proportional valves makes it possible for the user to create a specific level of noise in the pilot pressure. The hydraulic dither reduces friction at the main spool, reducing the hysteresis in the performance curves. This results in precise machine control and forms the basis for implementing assistance systems and automated systems with ease. The highly dynamic pilot valves with their low inductance, paired with a broad spectrum of available nominal volume ranges, results in the overall working hydraulics being more responsive.
Discover our extensive valve range for your pilot control
HYDAC proportional pressure control valves for applications from mini excavators to mining excavators
HYDAC proportional pressure control valve PDRC04T30D-01
This valve creates pilot flow rates of up to 4 l/min and can be used in excavators of up to roughly 20 t.
HYDAC proportional pressure control valve PDRC05S30A-14
The HYDAC pressure control valve is suitable for pilot flow rates of up to 12 l/min and excavators from approx. 20 t to
100 t. It impresses in this performance class with its unique size.
HYDAC proportional pressure control valve PDR08-02
With an emergency actuation option: the HYDAC valve for pilot flow rates up to
17 l/min is used in excavators from 20 t to 100 t.
HYDAC proportional pressure control valve PDR10830
For mining excavators from 100 t: the valve is suitable for pilot flow rates of 40 l/min and includes an emergency actuation option.
HYDAC switch valves for safety circuits
HYDAC switch valve WK08C-55 or WK08L-55
For a flow rate of 17 l/min or 22 l/min – with a compact coil for small modular dimensions on control blocks.
HYDAC switch valve WK06J
Ultra-compact valve and solenoid system: the HYDAC WK06J switch valve features a compact design and short switching times thanks to an optimised solenoid inductance. The WK06J is the optimum solution for pilot system structures with a proportional pressure-reducing valve and a downstream 4/3-way changeover valve.
HYDAC pressure-reducing valves with increased contamination resistance for supplying pilot control systems from high-pressure hydraulics
HYDAC pressure-reducing valve DR06-01
The extremely compact DR06-01 HYDAC pressure-reducing valve is suitable for flow rates of up to 15 l/min.
HYDAC pressure-reducing valve
DR08P-01
The pilot-operated valve is suitable for flow rates of up to 60l/min and is particularly contamination-resistant thanks to the use of special materials.
HYDAC pressure-reducing valve DR10X-01
For a flow rate of up to 30 l/min: relocating the high-pressure connection to a screwed fitting mounted in the outer contour enables the use of lighter and less expensive aluminium blocks.
