Mainly mounted in construction machinery telescopic cylinder with a plug-in structure. Users can insert it into the valve hole at the appropriate position of the hydraulic cylinder according to their needs. It has good locking performance and excellent function of controlling the smooth extension and contraction of the hydraulic cylinder. 1. Its pilot-operated opening mechanism allows for gentle control, thus preventing hydraulic shock. 2. The valve's long control stroke provides high resolution. 3. Optimizing the throttle groove of the balancing valve core allows for customized flow control. 4. This balancing valve utilizes a reverse-acting design, resulting in excellent locking performance.