200X Pressure Reducing Valve is one type of intelligent valve to regulate and control pipe pressure through the fluids self-energy. 200X Pressure Reducing Valve is applicable to living water supply, firefighting water supply and Industrial water supply system, it can adjust the main valve outlet pressure by adjusting the pressure reducing pilot valve. The main valve outlet pressure will not change because of affecting by the inlet pressure or inlet flow change, but will keep on the set one safely and reliably. The valve can be also adjusted the set pressure to achieve reducing the pressure.