The Zoomlion RK504 Hydraulic Multi-Way Control Valve is a heavy-duty directional control valve engineered specifically for the Zoomlion RK504 (50HP) tractor. Built from high-tensile cast iron with precision hard-chrome spools, it efficiently regulates hydraulic oil flow (up to $60\text{ L/min}$) and operating pressures (up to $20\text{ MPa}$) to power the tractor’s 3-point hitch lift system, front-end loaders, and trailing hydraulic implements. Featuring an integrated safety relief valve and anti-backflow check valve, it delivers leak-free, precise control and dependable lifting performance under demanding agricultural workloads