On February 21, 2025, the company obtained a patent titled "A Zero Position Adjustable Electro Hydraulic Servo Valve", with authorization announcement number CN 222502781 U and application date of December 2023.

The patent abstract shows that this utility model belongs to the field of mechanical engineering technology and relates to a zero position adjustable electro-hydraulic servo valve; The electro-hydraulic servo valve mainly includes a pre stage and a slide valve stage; The pre stage is set at the upper end of the slide valve stage, which includes a valve core, a valve sleeve, and a zero position adjustment mechanism; The zero position adjustment mechanism is set at both ends of the valve core; The zero position adjustment mechanism consists of a valve sleeve top block and a zero adjustment screw; A valve sleeve top block is provided between the two end faces of the valve sleeve and the end cover, and the end cover is fixed to the end face of the housing. The zero adjustment screw passes through the threaded hole of the end cover, and the feed amount of the valve sleeve top block can be changed by adjusting the zero adjustment screws on both sides, thereby adjusting the relative position of the valve sleeve, housing, and pre stage along the axis of the valve core, and adjusting the overall zero position of the servo valve. The advantage of this servo valve and zero adjustment method is that it can flexibly adjust the zero position of the servo valve in real time based on the operating conditions and system characteristics of the servo valve, which can significantly improve the matching between the servo valve and the system and effectively reduce the maintenance cost of the servo valve in the field.