Inverse Proportional Pressure Relief Cartridge Valve series DBDSB-1LG

Inverse proportional pressure relief valves series DBDSB-1LG…  are direct acting screw-in cartridges of sliding-spool design with a falling pressure/current characteristic and a 3/4-16 UNF mounting thread. With these pressure-relief cartridges, the relief pressure is dependent on the electrical control signal and can be continuously varied. When the solenoid is de-energised (initial position), the relief pressure is the nominal pressure of the applicable spring range (failsafe function). Any pressure at port 1 is additive to the valve setting at port 2, therefore port 1 should preferably be connected directly to tank. In control mode, the relief pressure is inversely proportional to the change in the required value (amplifier output current). In order to obtain precise pressure settings over the whole of the required pressure range (optimum resolution), the pressure relief cartridges are available in six spring ranges. If a proportional solenoid is faulty, for example, the integral manual pressure setting enables the required pressure to be set mechanically.