Parker Hannifin is expanding its DFplus Gen IV portfolio with a new D-version of its direct-operated proportional valve. The key innovation is a second freely configurable control loop, making the valve particularly attractive for applications where pressure, position, or flow must be controlled quickly and accurately directly through the valve electronics.
The new variant is primarily aimed at demanding hydraulic systems where machine builders want to reduce the need for external control equipment. By allowing analog pressure or displacement sensors to be connected directly to the valve electronics, the valve can be used for customized closed-loop control functions. The sensors can also be powered directly by the valve, simplifying installation and potentially reducing the amount of separate wiring and auxiliary equipment required.
The D-version builds on Parker’s fourth-generation DFplus platform. This generation has already introduced enhanced electronics, expanded communication capabilities, and IO-Link support. In the new D-version, these features are combined with a high-resolution sensor signal interface and selectable setpoint types for analog reference signals. According to Parker, configuration can be carried out either through the company’s ProPXD software or via IO-Link.
According to Parker, the new valve supports IO-Link Class A as standard, with an optional IO-Link Class B version available. Sensors are connected through an M12 connector on the valve electronics. The option is available for the D1FP, D3FP, and D30FP valve series.
In practical terms, this allows the valve to take over parts of the control function in applications where rapid response is critical. Parker highlights pressure control in paper machines as well as rapid pressure control and unloading in high-speed presses. Pump flow control and highly precise pressure regulation in other demanding industrial environments are also identified as potential applications.
Bringing more control functionality closer to the hydraulic valve itself aligns with a broader industry trend, where components are expected to deliver greater diagnostic capabilities, communication options, and local intelligence. For machine builders, this can simplify system architecture, although it also places greater emphasis on proper configuration and understanding the interaction between the valve, sensors, and the higher-level control system.
The launch should therefore be viewed as a step toward more integrated hydraulic solutions rather than an entirely new valve type. Parker is building on an established valve platform while adding features that can reduce complexity in certain high-dynamic applications. For users already working with the DFplus platform, the D-version may be particularly attractive where closed-loop control is required without adding a separate controller.
