Brake valves of the design LBM are used as safety valves for applications such as traction motors in wheel- or track excavators, as well as winch motors. They protect the hydromotor against exceeding speed or cavitation in the inlet side when driving downhill or when loads are dragging. The brake valve is designed as a symmetrical spool valve. The inlet flow into the connected hydromotor is routed via patented flow diverters. Even with a high damping these flow diverter valves allow a quick reverse of the motor without circulating the oil volume flow through the brake valve´s main piston. The brake valve is designed flow-optimized and can be used for volume flows up to 350 l/min with only small pressure losses. That facilitates high driving speed with little power loss. The braking function is regulated between 15 and 40 bar of the inlet pressure. The piston motion is damped. Two different damping variants are offered.


  • Wear-optimized housing and main spool
  • Suitable for "high speed" drives
  • Good cold start behavior
  • Smooth braking
  • Small flow losses
  • Compact design and easy to install
  • Allows flushing of the motor housing to prevent overheating

Technical specifications

DesignPort sizesMaximum pressureFlow rate
LBM track drivesSAE 1"450 bar250l/min
LBM wheel drivesSAE 1"450 bar250l/min