Regular Flange ,Pvc Flange,Weld Neck Flange,Companion Flange CHINA·SNGONG FLANGE MANUFACTURING CO., LTD. , https://www.sngonges.comWater pressure control valve is the key control element in hydraulic drive system, which is an important part of hydraulic drive technology research. This paper introduces some main types of hydraulic control valve products at home and abroad and performance, analyzes some typical structure and characteristics of hydraulic control valve, summarizes the current main hydraulic control valve used in engineering materials, and hydraulic control The development of the valve and its application prospect are prospected.