Proportional Pressure Relief Cartridge Valve series DBDSB-1L
Pressure relief cartridge valves

Proportional Pressure Relief Cartridge Valve series DBDSB-1L

Pressure [bar]


Flow rate [L/min]


Series DBDSB-1L… proportional pressure-relief valves are direct acting screw-in cartridges of sliding-spool design with 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), connection 2 → 1 is open and the minimum pressure (free flow) depends on the flow rate. 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 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.

  • Compact construction for cavity type AL– 3/4-16 UNF
  • Operated by a proportional solenoid
  • In a power failure, the pressure setting drops to the minimum value
  • 6 pressure ranges available
  • All exposed parts with zinc-nickel plating
  • High pressure wet-armature solenoids
  • The slip-on coil can be rotated, and it can be replaced without opening the hydraulic envelope
  • Various plug-connector systems and voltages are available
  • With integral manual pressure setting
  • Can be fitted in a line-mounting body
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