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By certification 
Usage and characteristic
DB Pilot operated relief valve and DBW solenoid controlled relief valve are pilot controlled grade-2 concentric relief valve. Both main valve and pilot valve are cone structure. DB valve is mainly used to control the pressure of system. DBW type valve can control the pressure of the system and release the pressure at anytime.
Shuangda Hydraulic Machinery is one of the professional pilot operated relief valve manufacturers and suppliers in China, welcome to buy cheap and low price pilot operated relief valve made in China from our factory.
