Rexroth Counterbalance Valve Same Hydraulic Cylinder Load Holding Valve

Rexroth counterbalance valve same will only open enough to allow a load to move at a desired flow rate ensuring the load will not "run away" due to external forces, such as gravity. So, unlike a P.O check valve, a counterbalance valve can provide full flow for hoisting while metering flow to provide controlled lowering.

Another key difference and advantage to a counterbalance valve is its relief characteristic. In cylinders with high bore / rod ratios thermal expansion on the cap end can cause pressure on the annular side to rise beyond yield strength of the material which results in an intensification failure. This may materialize as a ballooned barrel, a collapsed rod, a blown-out gland or seal – or a combination of failures.