709-61-11700 VALVE ASSY，（B）

One， The bulldozer shovel control valve assembly is the "nerve center" of the bulldozer hydraulic system, specializing in the three-dimensional motion control of the bulldozer shovel: 1. Vertical dimension: precise control of lifting cylinder stroke (within ± 500mm range) 2. Horizontal dimension: achieve ± 15 ° tilt adjustment of the shovel blade 3. Horizontal dimension: Supports angle shovel 25 ° -30 ° deflection control 4. Pressure management: Integrated 35MPa level safety overflow protection Two、 Advanced structural analysis 1. Modular valve body design Cast with high-strength ductile iron QT500-7 The surface of the flow channel is precision honed (Ra ≤ 0.4 μ m) Modular combination design (3-5 valve blocks) 2. Intelligent valve core system Proportional valve core (displacement accuracy ± 0.1mm) Wear resistant coating (hard chromium thickness ≥ 0.05mm) LVDT displacement feedback (optional) 3. Electro hydraulic control unit CAN bus communication (ISO11898 protocol) Pilot pressure adjustment range 0.5-4MPa Response time ＜ 80ms