Bosch Rexroth R900518521

The pressure valve type DBW is a pilot-operated pressure relief valve. They are used for limiting and solenoid-actuated unloading the operating pressure. The valve basically consists of the main valve (1) with main spool insert (3) and pilot control valve (2) with pressure adjustment element and one integrated directional spool valve (16). The function of this valve is basically the same as that of valve type DB. The unloading of the main spool (3) is, however, achieved by controlling the mounted directional spool valve (16). Pressure relief valve with switching shock damping (sandwich plate), version "DBW.../..S6...R12" The opening of the connection from B2 to B1 is delayed by means of the switching shock damping valve (17). Pressure peaks and acoustic decompression shocks in the return line are thus avoided. It is installed between the pilot control valve (2) and the directional valve (16). The degree of damping (decompression shock) is determined by the size of the nozzle (18). Nozzle Ø1.2 mm (ordering code "R12") is recommended.