Parker Introduces PE06 Proportional Pressure Reducing Valve to Enable Brake-By-Wire Hydraulic Systems

Parker Hannifin Corporation, the global leader in motion and control technologies, is advancing brake-by-wire technologies with the introduction of its PE06 proportional pressure reducing valve which combines a proportional valve piston with an internal hydraulic feedback piston. This design, showcased at CONEXPO-CON/AGG 2026, allows precise control of the reduced pressure along with a high-volume flow over the valve. Other benefits include a low internal leakage rate and a proven, reliable and robust design.
Brake-by-wire is an increasingly common technology particularly for off highway vehicles. It replaces mechanical links with electronic signals to improve safety, efficiency, braking response time, and design flexibility, while also saving on the weight and space needed for heavy hydraulic components. By providing a redundant architecture of the braking systems, it reduces the risk of catastrophic failures in cases of nonperformance of one circuit or electronic path.
Parker’s new, compact proportional pressure reducing valve enables advanced brake-by-wire systems by providing fast, precise hydraulic pressure control for electric/electro-hydraulic braking. Such technology is critical for autonomous and automated vehicle control systems. It is a key part of the growing effort to create hydraulic-free cabins which help to reduce noise, heat and production time, since many cabs come preassembled.
“The design of the new PE06 valve is similar to that of Parker’s successful direct operated proportional directional control valve (D1FB) which means it already has a proven track record,” said Frank Henschke, Product Manager, Motion Systems Group at Parker. “The similarities in design and components allow for a cost-optimized design and cost-effective production. Thanks to its modular design, it’s possible to use approximately 90 percent of the standard components of the D1FB industrial series when specifying the new proportional pressure reducing valve.”