Parker Hydraulic Group
CB Series Counterbalance Valves, Sandwich

Key Features

  • Controlled movement loads.
  • Load holding via leak-free poppet valve.
  • Secondary relief protection for the actuator.
  • Sizes:
    • CB03 – NFPA D03 / NG6 / CETOP 3
    • CB05 – NFPA D05 / NG10 / CETOP 5
    • CB5H – NFPA D05HE / NG10 / CETOP 5H
    • CB07 – NFPA D07 / NG16 / CETOP 7
    • CB08 – NFPA D08 / NG25 / CETOP 8

Click to Enlarge

Series CB counterbalance valve controls the actuator movement with overrunning loads.

The return flow from the actuator is piloted and controlled by the inlet flow to the actuator, ensuring a cavitation-free lowering of the load.

The counterbalance valve operates as a pressure relief valve. The setting pressure is lowered by the pressure in the inlet line. To ensure safe load holding the setting pressure should be approximately 30% higher than the max. load pressure.