200X pressure reducing valve is an intelligent valve which uses media' s own energy to regulate and control the pressure of pipelines. 200X pressure relief valve is applied for living water supply, fire protection water supply and other industrial water supply systems and it can adjust outlet pressure of the main valve by adjusting the pressure reducing pilot valve. The outlet pressure doesn’t change with changes of inlet pressure and inlet flow, sustaining the outlet pressure at the set value safely and reliably. it can also adjust set value to reach the purpose of reducing pressure according to demands. The valve can reduce pressure accurately, with stable performance, safety and reliability, convenient installation and adjustment and long service life.