Shuangda Hydraulic Machinery is one of the professional proportional electrohydraulic relief valve manufacturers and suppliers in China,Website:://.chinahydraulic-valve.com, welcome to buy cheap and low price proportional electrohydraulic relief valve made in China from our factory.Usage and characteristicWith the features of good oil-flow ability, ER-G03/06 proportional electro-hydraulic relief valve is composed by a direct-action proportional valve, a safety valve and a main valve. ER-G03/06 valve is suitable for the big flow hydraulic system with many pressure change tiers. ER-G03/06 valve can control the pressure of the hydraulic system by inputting an current proportion. This valve must be used with a dedicated proportional electronic card.