Shuangda Hydraulic Machinery is one of the professional remote control relief valve manufacturers and suppliers in China,Website:://.chinahydraulic-valve.com, welcome to buy cheap and low price remote control relief valve made in China from our factory.Usage and characteristicRemote controlled relief valve is used to remote control the pressure of controlled pressure valve by connecting to control port of the remote controlled pressure. It can also be used for 2-stage or multi-stage pressure control.